Nissan Murano Z50 (2003 year). Manual — part 89
TROUBLE DIAGNOSIS
EC-143
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FUEL PUMP RLY
●
For 1 second after turning ignition switch ON
●
Engine running or cranking
ON
●
Except above conditions
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 is 94
°
C
(201
°
F) or less
OFF
Engine coolant temperature is
between 95
°
C (203
°
F) and 99
°
C
(210
°
F)
LOW
Engine coolant temperature is 100
°
C
(212
°
F) or more
HI
HO2S1 HTR (B1)
HO2S1 HTR (B2)
●
Engine: After warming up
●
Engine speed: Below 3,600 rpm
ON
●
Engine speed: Above 3,600 rpm
OFF
HO2S2 HTR (B1)
HO2S2 HTR (B2)
●
Engine speed is 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 one minute
and at idle for one 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-II value with the speedometer
indication.
Almost the same speed as the
speedometer indication
TRVL AFTER MIL
●
Ignition switch: ON
Vehicle has traveled after MIL has
turned ON.
0 - 65,535 km
(0 - 40,723 mile)
O2SEN HTR DTY
●
Engine coolant temperature when engine started: More than 80
°
C (176
°
F)
●
Engine speed: Below 3,600 rpm
Approx. 50%
AC PRESS SEN
●
Ignition switch: ON (Engine stopped)
Approx. 0V
●
Engine: Idle
●
Air conditioner switch: ON
1.0 - 4.0V
VEH SPEED SE
●
Turn drive wheels and compare CONSULT-II value with the speedometer
indication.
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
CRUISE switch: Pressed
ON
CRUISE switch: Released
OFF
CANCEL SW
●
Ignition switch: ON
CANCEL switch: Pressed
ON
CANCEL switch: Released
OFF
RESUME/ACC SW
●
Ignition switch: ON
ACCEL/RES switch: Pressed
ON
ACCEL/RES switch: Released
OFF
SET SW
●
Ignition switch: ON
COAST/SET switch: Pressed
ON
COAST/SET switch: Released
OFF
BRAKE SW1
●
Ignition switch: ON
Brake pedal: Fully released
ON
Brake pedal: Slightly depressed
OFF
BRAKE SW2
●
Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
MONITOR ITEM
CONDITION
SPECIFICATION
EC-144
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
*: 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.
CRUISE LAMP
●
Ignition switch: ON
CRUISE switch pressed
ON
CRUISE switch released
OFF
SET LAMP
●
CRUISE switch: ON
●
When vehicle speed is between
40 km/h (25 MPH) and 144 km/h
(89 MPH)
COAST/SET switch pressed
ON
COAST/SET switch released
OFF
MONITOR ITEM
CONDITION
SPECIFICATION
TROUBLE DIAGNOSIS
EC-145
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Major Sensor Reference Graph in Data Monitor Mode
ABS004B4
The following are the major sensor reference graphs in “DATA MONITOR” mode.
CLSD THL POS, ACCEL SEN 1, THRTL SEN 1
Below is the data for “CLSD THL POS”, “ACCEL SEN 1” and “THRTL SEN 1” when depressing the accelera-
tor pedal with the ignition switch “ON” and with selector lever in “D” position.
The signal of “ACCEL SEN 1” and “THRTL SEN 1” should rise gradually without any intermittent drop or rise
after “CLSD THL POS” is changed from “ON” to “OFF”.
ENG SPEED, MAS A/F SE-B1, THRTL SEN 1, HO2S2 (B1), HO2S1 (B1), INJ PULSE-B1
Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL SEN 1”, “HO2S2 (B1)”, “HO2S1 (B1)” and
“INJ PULSE-B1” when revving engine quickly up to 4,800 rpm under no load after warming up engine suffi-
ciently.
Each value is for reference, the exact value may vary.
PBIB0198E
SEF241Y
EC-146
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
PBIB0668E
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-147
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
PFP:00031
Description
ABS004B5
The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:
●
B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)
●
A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
●
MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing Condition
ABS004B6
●
Vehicle driven distance: More than 5,000 km (3,017 miles)
●
Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm
2
, 14.25 - 15.12 psi)
●
Atmospheric temperature: 20 - 30
°
C (68 - 86
°
F)
●
Engine coolant temperature: 75 - 95
°
C (167 - 203
°
F)
●
Transmission: Warmed-up*
1
●
Electrical load: Not applied*
2
●
Engine speed: Idle
*1: After the engine is warmed up to normal operating temperature, drive vehicle until “FLUID TEMP SE” (CVT
fluid temperature sensor signal) indicates more than 60
°
C (140
°
F).
*2: Rear window defogger switch, air conditioner switch, lighting switch are “OFF”. Steering wheel is straight
ahead.
Inspection Procedure
ABS004B7
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1.
Perform
.
2.
Confirm that the testing conditions indicated above are met.
3.
Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2”
and “MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode with
CONSULT-II.
4.
Make sure that monitor items are within the SP value.
5.
EC-148, "Diagnostic Procedure"
SEF601Z
EC-148
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision; 2004 April
2003 Murano
Diagnostic Procedure
ABS004B8
SEF613ZD
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-149
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Revision; 2004 April
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SEF768Z
EC-150
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision; 2004 April
2003 Murano
SEF615ZA
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
EC-151
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TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
PFP:00006
Description
ABS004B9
Intermittent incidents (I/I) may occur. In many cases, the malfunction resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the customer's
complaint often do not recur on (1st trip) DTC visits. Realize also that the most frequent cause of I/I occur-
rences is poor electrical connections. Because of this, the conditions under which the incident occurred may
not be clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indicate the
specific malfunctioning area.
Common I/I Report Situations
Diagnostic Procedure
ABS004BA
1.
INSPECTION START
Erase (1st trip) DTCs. Refer to
EC-81, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMA-
>> GO TO 2.
2.
CHECK GROUND TERMINALS
Check ground terminals for corroding or loose connection.
Refer to
GI-26, "How to Perform Efficient Diagnosis for an Electrical Incident"
, "CIRCUIT INSPECTION",
"Ground Inspection".
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace.
3.
SEARCH FOR ELECTRICAL INCIDENT
Perform
GI-26, "How to Perform Efficient Diagnosis for an Electrical Incident"
, "INCIDENT SIMULATION
TESTS".
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace.
4.
CHECK CONNECTOR TERMINALS
Refer to
GI-23, "How to Check Terminal"
, "HOW TO PROBE CONNECTORS", “How to Check Enlarged Con-
tact Spring of Terminal”.
OK or NG
OK
>> INSPECTION END
NG
>> Repair or replace connector.
STEP in Work Flow
Situation
II
The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than “0” or “[1t]”.
III
The symptom described by the customer does not recur.
IV
(1st trip) DTC does not appear during the DTC Confirmation Procedure.
VI
The Diagnostic Procedure for PXXXX does not indicate the malfunctioning area.
EC-152
POWER SUPPLY CIRCUIT FOR ECM
Revision; 2004 April
2003 Murano
POWER SUPPLY CIRCUIT FOR ECM
PFP:24110
Wiring Diagram
ABS004BB
TBWA0341E
POWER SUPPLY CIRCUIT FOR ECM
EC-153
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Revision; 2004 April
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
109
R
Ignition switch
[Ignition switch “OFF”]
0V
[Ignition switch “ON”]
BATTERY VOLTAGE
(11 - 14V)
111
W/B
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch “OFF”]
●
For a few seconds after turning ignition
switch “OFF”
0 - 1.5V
[Ignition switch “OFF”]
●
A few seconds passed after turning ignition
switch “OFF”
BATTERY VOLTAGE
(11 - 14V)
119
120
R/B
R/B
Power supply for ECM
[Ignition switch “ON”]
BATTERY VOLTAGE
(11 - 14V)
EC-154
POWER SUPPLY CIRCUIT FOR ECM
Revision; 2004 April
2003 Murano
TBWA0342E
POWER SUPPLY CIRCUIT FOR ECM
EC-155
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Revision; 2004 April
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
ABS004BC
1.
INSPECTION START
Start engine.
Is engine running?
Yes or No
Yes
>> GO TO 7.
No
>> GO TO 2.
2.
CHECK ECM POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch “OFF” and then “ON”.
2.
Check voltage between ECM terminal 109 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Fuse block (J/B) connector M1
●
10A fuse
●
Harness for open or short between ECM and fuse
>> Repair harness or connectors.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
1
B
ECM ground
[Engine is running]
●
Idle speed
Engine ground
115
116
B
B
ECM ground
[Engine is running]
●
Idle speed
Engine ground
Voltage: Battery voltage
MBIB0015E
EC-156
POWER SUPPLY CIRCUIT FOR ECM
Revision; 2004 April
2003 Murano
4.
CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminals 1, 115, 116 and ground.
Refer to Wiring Diagram.
4.
Also check harness for short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Joint connector-1
●
Harness connectors F102, M82
●
Harness for open or short between ECM and ground
>> Repair open circuit or short to power in harness or connectors.
6.
CHECK ECM POWER SUPPLY CIRCUIT-II
1.
Reconnect ECM harness connector.
2.
Turn ignition switch “ON”.
3.
Check voltage between IPDM E/R terminal 35 and ground with
CONSULT-II or tester.
OK or NG
OK
>> Go to
.
NG
>> GO TO 7.
7.
CHECK ECM POWER SUPPLY CIRCUIT-III
1.
Turn ignition switch “ON” and then “OFF”.
2.
Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK
>> GO TO 16.
NG (Battery voltage does not exist.)>>GO TO 8.
NG (Battery voltage exists for more than a few seconds.)>>GO TO
16.
Continuity should exist.
Voltage: Battery voltage
PBIB1396E
Voltage:
After turning ignition switch “OFF”, battery
voltage will exist for a few seconds, then
drop approximately 0V.
MBIB0016E
POWER SUPPLY CIRCUIT FOR ECM
EC-157
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8.
CHECK ECM POWER SUPPLY CIRCUIT-V
1.
Turn ignition switch “OFF”.
2.
Check voltage between ECM terminal 111 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 11.
9.
CHECK ECM POWER SUPPLY CIRCUIT-VI
1.
Disconnect ECM harness connector.
2.
Disconnect IPDM E/R harness connector E8.
3.
Check harness continuity between ECM terminals 119, 120 and IPDM E/R terminal 33.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 14.
NG
>> GO TO 10.
10.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness or connectors E110, M7
●
Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
11.
CHECK ECM POWER SUPPLY CIRCUIT-VII
1.
Disconnect ECM harness connector.
2.
Disconnect IPDM E/R harness connector.
3.
Check harness continuity between ECM terminal 111 and IPDM E/R terminal 44.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 13.
NG
>> GO TO 12.
12.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness or connectors E109, M6
●
Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
Voltage: Battery voltage
PBIB1191E
Continuity should exist.
Continuity should exist.
EC-158
POWER SUPPLY CIRCUIT FOR ECM
Revision; 2004 April
2003 Murano
13.
CHECK 15A FUSE
1.
Disconnect 15A fuse from IPDM E/R.
2.
Check 15A fuse.
OK or NG
OK
>> GO TO 16.
NG
>> Replace 15A fuse.
14.
CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminals 1, 115, 116 and ground.
Refer to Wiring Diagram.
4.
Also check harness for short to power.
OK or NG
OK
>> GO TO 16.
NG
>> GO TO 15.
15.
DETECT MALFUNCTIONING PART
Check the following.
●
Joint connector-1
●
Harness connectors F102, M82
●
Harness for open or short between ECM and ground
>> Repair open circuit or short to power in harness or connectors.
16.
CHECK INTERMITTENT INCIDENT
Refer to
EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
OK or NG
OK
>> Replace IPDM E/R.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
Continuity should exist.
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