Nissan Murano Z51 (2008 year). Manual — part 232
BLOWER MOTOR
HAC-187
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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BLOWER MOTOR
Description
INFOID:0000000003469349
COMPONENT DESCRIPTION
Brush-less Motor
The blower motor utilizes a brush-less motor with a rotating magnet.
Quietness is improved over previous motors where the brush was
the point of contact and the coil rotated.
Blower Motor Circuit
Component Function Check
INFOID:0000000003469350
1.
CHECK OPERATION
1.
Warm up the engine.
2.
Operate the fan control dial. Check that the fan speed and indicator are switched for all fan speeds.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis for the blower motor. Refer to
HAC-187, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000003469351
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
Is any DTC No. displayed?
YES
>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to
.
NO
>> GO TO 2.
2.
CHECK WITH ACTIVE TEST OF CONSULT-III
1.
Using CONSULT-III, perform “HVAC TEST” “ACTIVE TEST” of HVAC to check each output device. Refer
to
HAC-157, "CONSULT-III Function"
NOTE:
Perform the ACTIVE TEST after starting the engine because the compressor is operated.
ZHA152H
JSIIA0999ZZ
Revision: 2008 October
2009 Murano
HAC-188
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
BLOWER MOTOR
2.
Check that the blower motor control signal changes according to each indicator signal.
NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated.
Does it operate normally?
YES
>> INSPECTION END
NO
>> GO TO 3.
3.
CHECK POWER SUPPLY FOR BLOWER MOTOR
1.
Disconnect blower motor connector.
2.
Turn ignition switch ON.
3.
Check voltage between blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 7.
4.
CHECK BLOWER MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK BLOWER MOTOR CIRCUIT CONTINUITY
1.
Disconnect A/C auto amp. connector.
2.
Check continuity between blower motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 6.
Test item
MODE 1
MODE 2
MODE 3
MODE 4
MODE 5
MODE 6
MODE 7
Mode door position
VENT1
VENT2
B/L1
B/L2
FOOT
D/F
DEF
Intake door position
REC
REC
20%FRE
20%FRE
FRE
FRE
FRE
Air mix door position
(driver & passenger
side)
FULL COLD
FULL HOT
FULL COLD
FULL HOT
FULL HOT
FULL HOT
FULL HOT
Blower motor duty ratio
35%
35%
61%
61%
81%
81%
35%
Compressor (Magnet
clutch)
ON
ON
ON
ON
OFF
OFF
ON
Upper ventilator door
OPEN
SHUT
OPEN
SHUT
SHUT
SHUT
SHUT
(+)
(
−
)
Voltage
Blower motor
—
Connector
Terminal
M98
1
Ground
Battery voltage
Blower motor
—
Continuity
Connector
Terminal
M98
3
Ground
Existed
Blower motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M98
2
M50
32
Existed
Revision: 2008 October
2009 Murano
BLOWER MOTOR
HAC-189
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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NO
>> Repair harness or connector.
6.
CHECK A/C AUTO AMP. OUTPUT SIGNAL
1.
Reconnect blower motor connector and A/C auto amp. connector.
2.
Turn ignition switch ON.
3.
Set MODE switch to the VENT position.
4.
Check the output waveform between blower motor harness connector and ground using an oscilloscope,
while varying the fan speed from 1 to 7.
Is the inspection result normal?
YES
>> Replace the blower motor.
NO
>> Replace the A/C auto amp.
7.
CHECK POWER VOLTAGE OF BLOWER RELAY
1.
Turn the ignition switch OFF.
2.
Remove the blower relay. Refer to
PG-101, "Fuse, Connector and Terminal Arrangement"
3.
Turn the ignition switch ON.
4.
Check the voltage between blower relay fuse block side terminal and ground. Refer to
Connector and Terminal Arrangement"
for relay terminal assignment.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Inspection the power supply circuit. Refer to
PG-59, "Wiring Diagram - IGNITION POWER SUP-
8.
CHECK BLOWER RELAY
1.
Turn the ignition switch OFF.
2.
Install the blower relay. Refer to
PG-101, "Fuse, Connector and Terminal Arrangement"
.
3.
Turn the ignition switch ON.
4.
Check the operating sound of blower relay.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace the blower relay.
9.
CHECK FUSE
Check 15A fuses (Nos. 21 and 22).
NOTE:
JPIIA0616GB
(+)
(
−
)
Voltage
Blower relay
—
1
Ground
Battery voltage
3
Revision: 2008 October
2009 Murano
HAC-190
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
BLOWER MOTOR
PG-101, "Fuse, Connector and Terminal Arrangement"
Is the inspection result normal?
YES
>> Repair the harnesses or connectors.
NO
>> Replace the fuse after repairing the applicable circuit.
Component Inspection
INFOID:0000000003469352
1.
CHECK BLOWER MOTOR
1.
Remove the blower motor. Refer to
.
2.
Check that the blower motor rotates smoothly.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace blower motor.
Revision: 2008 October
2009 Murano
MAGNET CLUTCH
HAC-191
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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MAGNET CLUTCH
Description
INFOID:0000000003469353
The magnet clutch drives the compressor, by an IPDM E/R signal.
Component Function Check
INFOID:0000000003469354
1.
FUNCTION INSPECTION
1.
Press AUTO switch.
2.
“AUTO” is indicated on the display.
3.
Press the A/C switch.
4.
Check that the indicator of the A/C switch turns on. Check visually and by sound that the compressor is
operating (the discharge air temperature or fan speed varies depending on the ambient temperature, in-
vehicle temperature, and temperature setting).
5.
Press the A/C switch again.
6.
Check that the indicator of the A/C switch turns OFF. Check visually and by sound that the compressor
stops.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis for the compressor. Refer to
HAC-191, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000003469355
1.
INSPECTION IN AUTO ACTIVE TEST MODE
Perform “AUTO ACTIVE TEST”. Refer to
PCS-10, "Diagnosis Description"
Does it operate normally?
YES
>> GO TO 5.
NO
>> GO TO 2.
2.
CHECK MAGNET CLUTCH
1.
Turn the ignition switch OFF.
2.
Disconnect the magnet clutch connector.
3.
Directly apply the battery voltage to the magnet clutch. Check for operation visually and by sound.
Does it operate normally?
YES
>> GO TO 3.
NO
>> Replace the compressor.
3.
CHECK MAGNET CLUTCH CIRCUIT CONTINUITY
1.
Turn the ignition switch OFF.
2.
Disconnect IPDM E/R connector.
3.
Check continuity between magnet clutch harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK FUSE
Check 10A fuse (No. 49).
NOTE:
Refer to
PG-103, "Fuse, Connector and Terminal Arrangement"
for fuse location.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
IPDM E/R
Compressor
Continuity
Connector
Terminal
Connector
Terminal
F12
48
F18
1
Existed
Revision: 2008 October
2009 Murano
HAC-192
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
MAGNET CLUTCH
NO
>> Replace the fuse after repairing the applicable circuit.
5.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
Is any DTC No. displayed?
YES
>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to
.
NO
>> GO TO 6.
6.
CHECK A/C AUTO AMP. INPUT SIGNAL
Using CONSULT-III, check “On/Off” of “COMP REQ SIG” and “FAN REQ SIG” in “DATA MONITOR” of HVAC.
Refer to
HAC-157, "CONSULT-III Function"
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace A/C auto amp.
7.
CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace malfunctioning parts.
A/C SWITCH ON
: COMP REQ SIG On
A/C SWITCH OFF
: COMP REQ SIG Off
FAN CONTROL DIAL ON
: FAN REQ SIG On
FAN CONTROL DIAL OFF
: FAN REQ SIG Off
Revision: 2008 October
2009 Murano
POWER SUPPLY AND GROUND CIRCUIT
HAC-193
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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HAC
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POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Description
INFOID:0000000003469356
COMPONENT DESCRIPTION
A/C Auto Amp. (Air Conditioner Automatic Amplifier)
The A/C auto amp. (1) has a built-in microcomputer that processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor(s), the mode door motor, the
intake door motor, the upper ventilator door motor, the blower motor
and the compressor are then controlled.
When the various switches and temperature control dial are oper-
ated, data is input to the A/C auto amp. from the AV control unit
using CAN communication.
The A/C auto amp. is operated with control mechanisms. Signals
from various switches and Potentio Temperature Control (PTC) are
directly entered into the A/C auto amp.
Power Supply and Ground Circuit for A/C Auto Amp.
A/C AUTO AMP. : Component Function Check
INFOID:0000000003469357
1.
CHECK OPERATION
1.
Press the AUTO switch, and then check that “AUTO” is shown on the display.
2.
Operate the temperature control dial (driver side). Check that the fan speed or outlet changes. (The dis-
charge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting.)
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis for the A/C system. Refer to
HAC-193, "A/C AUTO AMP. : Diagnosis
.
A/C AUTO AMP. : Diagnosis Procedure
INFOID:0000000003469358
1.
INSPECTION BY FAIL-SAFE FUNCTION
1.
Turn the ignition switch ON.
2.
After approximately 30 seconds, check that the air conditioner is operated by the fail-safe function (the
operation display of air conditioner is not performed). Refer to
.
Is the fail-safe function operated?
YES
>> GO TO 5.
NO
>> GO TO 2.
2.
CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT
1.
Disconnect the A/C auto amp. connector.
2.
Check voltage between A/C auto amp. harness connector and ground.
JPIIA0609ZZ
JPIIA0617GB
Revision: 2008 October
2009 Murano
HAC-194
< COMPONENT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK FUSE
Check 10A fuses [Nos. 3, 6 and 19, located in the fuse block (J/B)].
NOTE:
Refer to
PG-101, "Fuse, Connector and Terminal Arrangement"
Is the inspection result normal?
YES
>> Repair the harnesses or connectors.
NO
>> Replace the fuse after repairing the applicable circuit.
4.
CHECK A/C AUTO AMP. CIRCUIT CONTINUITY
1.
Turn ignition switch OFF.
2.
Check continuity between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair the harnesses or connectors.
5.
CHECK PRESET SWITCH
Check the preset switch. Refer to
(bose audio without navigation) or
(bose audio with navigation).
Is the inspection result normal?
YES
>> Replace the A/C auto amp.
NO
>> Repair or replace parts according to the inspection results.
(+)
(
−
)
Voltage
A/C auto amp.
—
Ignition switch position
Connector
Terminal
OFF
ACC
ON
M50
17
Ground
Approx. 0 V
Battery voltage
Battery voltage
20
Approx. 0 V
Approx. 0 V
Battery voltage
40
Battery voltage
Battery voltage
Battery voltage
A/C auto amp.
—
Continuity
Connector
Terminal
M50
19
Ground
Existed
39
Revision: 2008 October
2009 Murano
ECM
HAC-195
< ECU DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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ECU DIAGNOSIS
ECM
Reference Value
INFOID:0000000003671422
VALUES ON THE DIAGNOSIS TOOL
Remarks:
z
Specification data are reference values.
z
Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
I.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show
the specification data in spite of the ignition timing not being adjusted to the specification data. This IGN TIM-
ING monitors the data calculated by the ECM according to the signals input from the camshaft position sensor
and other ignition timing related sensors.
Monitor Item
Condition
Values/Status
ENG SPEED
Run engine and compare CONSULT-III value with the tachometer indication.
Almost the same speed as
the tachometer indication.
MAS A/F SE-B1
See
.
B/FUEL SCHDL
See
.
A/F ALPHA-B1
See
.
A/F ALPHA-B2
See
.
COOLAN TEMP/S
• Engine: After warming up
More than 70
°
C (158
°
F)
A/F SEN1 (B1)
• Engine: After warming up
Maintaining engine speed at 2,000 rpm
Fluctuates around 2.2 V
A/F SEN1 (B2)
• Engine: After warming up
Maintaining engine speed at 2,000 rpm
Fluctuates around 2.2 V
HO2S2 (B1)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
0 - 0.3 V
←→
Approx. 0.6 -
1.0 V
HO2S2 (B2)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
0 - 0.3 V
←→
Approx. 0.6 -
1.0 V
HO2S2 MNTR (B1)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
LEAN
←→
RICH
HO2S2 MNTR (B2)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
LEAN
←→
RICH
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.
Almost the same speed as
speedometer indication
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14 V
ACCEL SEN 1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.5 - 1.0 V
Accelerator pedal: Fully depressed
4.2 - 4.8 V
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.5 - 1.0 V
Accelerator pedal: Fully depressed
4.2 - 4.8 V
Revision: 2008 October
2009 Murano
HAC-196
< ECU DIAGNOSIS >
[WITH 7 INCH DISPLAY]
ECM
TP SEN 1-B1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D position
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
TP SEN 2-B1*
1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D position
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
FUEL T/TMP SE
• Ignition switch: ON
Indicates fuel tank tempera-
ture
INT/A TEMP SE
• Ignition switch: ON
Indicates intake air tempera-
ture
EVAP SYS PRES
• Ignition switch: ON
Approx. 1.8 - 4.8 V
FUEL LEVEL SE
• Ignition switch: ON
Depending on fuel level of
fuel tank
START SIGNAL
• Ignition switch: ON
→
START
→
ON
OFF
→
ON
→
OFF
CLSD THL POS
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
ON
Accelerator pedal: Slightly depressed
OFF
AIR COND SIG
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates.)
ON
P/N POSI SW
• Ignition switch: ON
Selector lever: P or N position
ON
Selector lever: Except above position
OFF
PW/ST SIGNAL
• Engine: After warming up, idle the
engine
Steering wheel: Not being turned
OFF
Steering wheel: Being turned
ON
LOAD SIGNAL
• Ignition switch: ON
Rear window defogger switch: ON
and/or
Lighting switch: 2nd position
ON
Rear window defogger switch and lighting
switch: OFF
OFF
IGNITION SW
• Ignition switch: ON
→
OFF
→
ON
ON
→
OFF
→
ON
HEATER FAN SW
• Engine: After warming up, idle the
engine
Heater fan switch: ON
ON
Heater fan switch: OFF
OFF
BRAKE SW
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
INJ PULSE-B1
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
INJ PULSE-B2
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
IGN TIMING
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
7 - 17
°
BTDC
2,000 rpm
25 - 45
°
BTDC
CAL/LD VALUE
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
5 - 35%
2,500 rpm
5 - 35%
MASS AIRFLOW
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
2.0 - 6.0 g·m/s
2,500 rpm
7.0 - 20.0 g·m/s
Monitor Item
Condition
Values/Status
Revision: 2008 October
2009 Murano
ECM
HAC-197
< ECU DIAGNOSIS >
[WITH 7 INCH DISPLAY]
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HAC
N
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PURG VOL C/V
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal: Not depressed even
slightly, after engine starting.)
0%
2,000 rpm
—
INT/V TIM (B1)
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
−
5 - 5
°
CA
2,000 rpm
Approx. 0 - 30
°
CA
INT/V TIM (B2)
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
−
5 - 5
°
CA
2,000 rpm
Approx. 0 - 30
°
CA
INT/V SOL (B1)
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
0 - 2%
2,000 rpm
Approx. 0 - 50%
INT/V SOL (B2)
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
0 - 2%
2,000 rpm
Approx. 0 - 50%
VIAS S/V-1
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
When revving engine up to 5,000 rpm
quickly
OFF
→
ON
→
OFF
VIAS S/V-2
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
When revving engine up to 5,000 rpm
quickly
OFF
→
ON
→
OFF
AIR COND RLY
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates)
ON
ENGINE MOUNT
• Engine: After warming up
Below 950 rpm
IDLE
Above 950 rpm
TRVL
FUEL PUMP RLY
• For 1 second after turning ignition switch: ON
• Engine running or cranking
ON
• Except above
OFF
VENT CONT/V
• Ignition switch: ON
OFF
THRTL RELAY
• Ignition switch: ON
ON
COOLING FAN
• Engine: After warming up, idle the
engine
• Air conditioner switch: OFF
Engine coolant temperature: 97
°
C
(206
°
F) or less
OFF
Engine coolant temperature: Between
98
°
C (208
°
F) and 99
°
C (210
°
F)
LOW
Engine coolant temperature: Between
100
°
C (212
°
F) and 104
°
C (219
°
F)
MID
Engine coolant temperature: 105
°
C
(221
°
F) or more
HI
HO2S2 HTR (B1)
• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
ON
• Engine speed: Above 3,600 rpm
OFF
Monitor Item
Condition
Values/Status
Revision: 2008 October
2009 Murano
HAC-198
< ECU DIAGNOSIS >
[WITH 7 INCH DISPLAY]
ECM
HO2S2 HTR (B2)
• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
ON
• Engine speed: Above 3,600 rpm
OFF
I/P PULLY SPD
• Vehicle speed: More than 20 km/h (12 MPH)
Almost the same speed as
the tachometer indication
VEHICLE SPEED
• Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.
Almost the same speed as
the speedometer indication
IDL A/V LEARN
• Engine: Running
Idle air volume learning has not been per-
formed yet.
YET
Idle air volume learning has already been
performed successfully.
CMPLT
ENG OIL TEMP
• Engine: After warming up
More than 70
°
C (158
°
F)
TRVL AFTER MIL
• Ignition switch: ON
Vehicle has traveled after MIL has illumi-
nated.
0 - 65,535 km
(0 - 40,723 miles)
A/F S1 HTR (B1)
• Engine: After warming up, idle the engine
(More than 140 seconds after starting engine)
4 - 100%
A/F S1 HTR (B2)
• Engine: After warming up, idle the engine
(More than 140 seconds after starting engine)
4 - 100%
AC PRESS SEN
• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)
1.0 - 4.0 V
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.
Almost the same speed as
the speedometer indication
SET VHCL SPD
• Engine: Running
ASCD: Operating
The preset vehicle speed is
displayed
MAIN SW
• Ignition switch: ON
MAIN switch: Pressed
ON
MAIN switch: Released
OFF
CANCEL SW
• Ignition switch: ON
CANCEL switch: Pressed
ON
CANCEL switch: Released
OFF
RESUME/ACC SW
• Ignition switch: ON
RESUME/ACCELERATE switch:
Pressed
ON
RESUME/ACCELERATE switch: Re-
leased
OFF
SET SW
• Ignition switch: ON
SET/COAST switch: Pressed
ON
SET/COAST switch: Released
OFF
BRAKE SW1
(ASCD brake switch)
• Ignition switch: ON
Brake pedal: Fully released
ON
Brake pedal: Slightly depressed
OFF
BRAKE SW2
(Stop lamp switch)
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
VHCL SPD CUT
• Ignition switch: ON
NON
LO SPEED CUT
• Ignition switch: ON
NON
AT OD MONITOR
• Ignition switch: ON
OFF
AT OD CANCEL
• Ignition switch: ON
OFF
CRUISE LAMP
• Ignition switch: ON
MAIN switch: Pressed at the 1st time
→
at the 2nd time
ON
→
OFF
SET LAMP
• MAIN switch: ON
• When vehicle speed is between
40 km/h (25 MPH) and 144 km/h
(89 MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
Monitor Item
Condition
Values/Status
Revision: 2008 October
2009 Murano
ECM
HAC-199
< ECU DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.
*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
• ECM is located in the engine room left side near battery.
• Specification data are reference values.
• Pulse signal is measured by CONSULT-III.
ALT DUTY
• Engine: Idle
0 - 80%
A/F ADJ-B1
• Engine: Running
−
0.330 - 0.330
A/F ADJ-B2
• Engine: Running
−
0.330 - 0.330
BAT CUR SEN
• Engine speed: Idle
• Battery: Fully charged*
2
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Approx. 2,600 - 3,500 mV
ALT DUTY SIG
• Power generation voltage variable control: Operating
ON
• Power generation voltage variable control: Not operating
OFF
Monitor Item
Condition
Values/Status
PBIA9221J
Terminal No.
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
1
(P/B)
112
(B)
Fuel injector No. 6
Output
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle
BATTERY VOLTAGE
(11 - 14 V)
3
(L/W)
Fuel injector No. 5
29
(LG/R)
Fuel injector No. 4
30
(R/Y)
Fuel injector No. 3
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14 V)
31
(R/W)
Fuel injector No. 2
32
(R/B)
Fuel injector No. 1
2
(G/W)
112
(B)
Throttle control motor power
supply
Input
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
JMBIA0047GB
JMBIA0048GB
Revision: 2008 October
2009 Murano
HAC-200
< ECU DIAGNOSIS >
[WITH 7 INCH DISPLAY]
ECM
4
(BR/Y)
112
(B)
A/F sensor 1 heater
(bank 1)
Output
[Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after
starting engine)
2.9 - 8.8 V
5
(L)
112
(B)
Throttle control motor (Open)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully de-
pressed
0 - 14 V
[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully re-
leased
0 - 14 V
6
(P)
112
(B)
Throttle control motor (Close)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully re-
leased
0 - 14 V
8
(SB)
112
(B)
A/F sensor 1 heater (bank 2)
Output
[Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after
starting engine)
2.9 - 8.8 V
Terminal No.
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0902GB
JMBIA0031GB
JMBIA0032GB
JMBIA1125GB
JMBIA0030GB
Revision: 2008 October
2009 Murano
ECM
HAC-201
< ECU DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
9
(L/B)
112
(B)
Ignition signal No. 3
Output
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle
0 - 0.2 V
10
(G/R)
Ignition signal No. 2
11
(Y/R)
Ignition signal No. 1
18
(GR/R)
Ignition signal No. 6
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
0.1 - 0.4 V
19
(P)
Ignition signal No. 5
21
(W)
Ignition signal No. 4
12
(B)
—
ECM ground
—
—
—
13
(P/B)
112
(B)
Heated oxygen sensor 2 heat-
er (bank 1)
Output
[Engine is running]
• Engine speed: Below 3,600
rpm after the following condi-
tions are met
- Engine: after warming up
- Keeping the engine speed be-
tween 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load
10 V
[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600
rpm
BATTERY VOLTAGE
(11 - 14 V)
14
(GR)
112
(B)
Fuel pump relay
Output
[Ignition switch: ON]
• For 1 second after turning ig-
nition switch ON
[Engine is running]
0 - 1.5 V
[Ignition switch: ON]
• More than 1 second after turn-
ing ignition switch ON
BATTERY VOLTAGE
(11 - 14 V)
15
(O)
112
(B)
Throttle control motor relay
Output
[Ignition switch: ON
→
OFF]
0 - 1.0 V
→
BATTERY VOLTAGE
(11 - 14 V)
→
0 V
[Ignition switch: ON]
0 - 1.0 V
16
(B/Y)
—
ECM ground
—
—
—
Terminal No.
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0035GB
JMBIA0036GB
JMBIA0902GB
Revision: 2008 October
2009 Murano
HAC-202
< ECU DIAGNOSIS >
[WITH 7 INCH DISPLAY]
ECM
17
(R)
112
(B)
Heated oxygen sensor 2 heat-
er (bank 2)
Output
[Engine is running]
• Engine speed: Below 3,600
rpm after the following condi-
tions are met
- Engine: after warming up
- Keeping the engine speed be-
tween 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load
10 V
[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600
rpm
BATTERY VOLTAGE
(11 - 14 V)
24
(W/B)
112
(B)
ECM relay
(Self shut-off)
Output
[Engine is running]
[Ignition switch: OFF]
• A few seconds after turning
ignition switch OFF
0 - 1.5 V
[Ignition switch: OFF]
• More than a few seconds after
turning ignition switch OFF
BATTERY VOLTAGE
(11 - 14 V)
25
(P/L)
112
(B)
EVAP canister purge volume
control solenoid valve
Output
[Engine is running]
• Idle speed
• Accelerator pedal: Not de-
pressed even slightly, after
engine starting
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Engine speed: approximately
2,000 rpm (More than 100
seconds after starting engine)
BATTERY VOLTAGE
(11 - 14 V)
26
(GR/R)*
3
(GR/B)*
4
112
(B)
VIAS control solenoid valve 2
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• When revving engine up to
5,000 rpm quickly
BATTERY VOLTAGE (11 - 14 V)
↓
0 - 1.0 V
↓
BATTERY VOLTAGE (11 - 14 V)
27
(V)
112
(B)
VIAS control solenoid valve 1
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• When revving engine up to
5,000 rpm quickly
BATTERY VOLTAGE (11 - 14 V)
↓
0 - 1.0 V
↓
BATTERY VOLTAGE (11 - 14 V)
Terminal No.
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0902GB
JMBIA0039GB
JMBIA0040GB
Revision: 2008 October
2009 Murano
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