Nissan Pathfinder (2005 year). Instruction — part 193
DTC P0550 PSP SENSOR
EC-395
C
D
E
F
G
H
I
J
K
L
M
A
EC
2005 Pathfinder
6.
CHECK INTERMITTENT INCIDENT
Refer to
EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
UBS00KBA
POWER STEERING PRESSURE SENSOR
1.
Reconnect all harness connectors disconnected.
2.
Start engine and let it idle.
3.
Check voltage between ECM terminal 12 and ground under the
following conditions.
Removal and Installation
UBS00KBB
POWER STEERING PRESSURE SENSOR
Refer to
.
Condition
Voltage
Steering wheel is being turned.
0.5 - 4.5V
Steering wheel is not being turned.
0.4 - 0.8V
MBIB0126E
EC-396
DTC P0605 ECM
2005 Pathfinder
DTC P0605 ECM
PFP:23710
Component Description
UBS00KBC
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
On Board Diagnosis Logic
UBS00KBD
This self-diagnosis has one or two trip detection logic.
FAIL-SAFE MODE
ECM enters fail-safe mode when the malfunction A is detected.
DTC Confirmation Procedure
UBS00KBE
Perform “PROCEDURE FOR MALFUNCTION A” first. If the 1st trip DTC cannot be confirmed, perform
PROCEDURE FOR MALFUNCTION B. If there is no malfunction on PROCEDURE FOR MALFUNCTION
B, perform PROCEDURE FOR MALFUNCTION C.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
PROCEDURE FOR MALFUNCTION A
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
If 1st trip DTC is detected, go to
EC-397, "Diagnostic Procedure"
.
With GST
Follow the procedure “With CONSULT-II” above.
PBIB1164E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0605
0605
Engine control module
A)
ECM calculation function is malfunctioning.
●
ECM
B)
ECM EEP-ROM system is malfunctioning.
C)
ECM self shut-off function is malfunctioning.
Detected items
Engine operation condition in fail-safe mode
Malfunction A
●
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5
degrees) by the return spring.
●
ECM deactivates ASCD operation.
SEF058Y
DTC P0605 ECM
EC-397
C
D
E
F
G
H
I
J
K
L
M
A
EC
2005 Pathfinder
PROCEDURE FOR MALFUNCTION B
With CONSULT-II
1.
Turn ignition switch ON and wait at least 1 second.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Turn ignition switch OFF, wait at least 10 seconds, and then turn
ON.
4.
If 1st trip DTC is detected, go to
EC-397, "Diagnostic Procedure"
.
With GST
Follow the procedure “With CONSULT-II” above.
PROCEDURE FOR MALFUNCTION C
With CONSULT-II
1.
Turn ignition switch ON and wait at least 1 second.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Turn ignition switch OFF, wait at least 10 seconds, and then turn
ON.
4.
Repeat step 3 for 32 times.
5.
If 1st trip DTC is detected, go to
EC-397, "Diagnostic Procedure"
.
With GST
Follow the procedure “With CONSULT-II” above.
Diagnostic Procedure
UBS00KBF
1.
INSPECTION START
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “SELF DIAG RESULTS” mode with CONSULT-II.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
.
5.
Is the 1st trip DTC P0605 displayed again?
With GST
1.
Turn ignition switch ON.
2.
Select Service $04 with GST.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
.
5.
Is the 1st trip DTC P0605 displayed again?
Yes or No
Yes
>> GO TO 2.
No
>> INSPECTION END
SEF058Y
SEF058Y
EC-398
DTC P0605 ECM
2005 Pathfinder
2.
REPLACE ECM
1.
Replace ECM.
2.
Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. Refer to
BL-101, "ECM Re-communicating Function"
.
3.
Perform
.
4.
Perform
EC-88, "Accelerator Pedal Released Position Learning"
.
5.
Perform
EC-88, "Throttle Valve Closed Position Learning"
.
6.
Perform
EC-89, "Idle Air Volume Learning"
.
>> INSPECTION END
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER
EC-399
C
D
E
F
G
H
I
J
K
L
M
A
EC
2005 Pathfinder
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER
PFP:22693
Description
UBS00KBG
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the air fuel ratio (A/F) sensor 1 heater corresponding to the engine
operating condition to keep the temperature of air fuel ratio (A/F) sensor 1 element at the specified range.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KBH
Specification data are reference values.
On Board Diagnosis Logic
UBS00KBI
DTC Confirmation Procedure
UBS00KBJ
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10.5V and 16V at
idle.
With CONSULT-II
WITH CONSULT-II
1.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2.
Start engine and let it idle for at least 10 seconds.
3.
If 1st trip DTC is detected, go to
EC-404, "Diagnostic Procedure"
.
Sensor
Input Signal to ECM
ECM function
Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine speed
Air fuel ratio (A/F) sensor 1
heater control
Air fuel ratio (A/F) sensor 1 heater
Mass air flow sensor
Amount of intake air
MONITOR ITEM
CONDITION
SPECIFICATION
A/F S1 HTR (B1)
A/F S1 HTR (B2)
●
Engine: After warming up, idle the engine
0 - 100%
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1031
1031
(Bank 1)
Air fuel ratio (A/F) sensor
1 heater control circuit
low
The current amperage in the heated air fuel ratio
(A/F) sensor 1 heater circuit is out of the normal
range.
(An excessively low voltage signal is sent to ECM
through the heated air fuel ratio (A/F) sensor 1
heater.)
●
Harness or connectors
(The air fuel ratio (A/F) sensor 1
heater circuit is open or shorted.)
●
Air fuel ratio (A/F) sensor 1 heater
P1051
1051
(Bank 2)
P1032
1032
(Bank 1)
Air fuel ratio (A/F) sensor
1 heater control circuit
high
The current amperage in the heated air fuel ratio
(A/F) sensor 1 heater circuit is out of the normal
range.
(An excessively high voltage signal is sent to ECM
through the heated air fuel ratio (A/F) sensor 1
heater.)
●
Harness or connectors
(The air fuel ratio (A/F) sensor 1
heater circuit is shorted.)
●
Air fuel ratio (A/F) sensor 1 heater
P1052
1052
(Bank 2)
SEF058Y
EC-400
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER
2005 Pathfinder
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER
EC-401
C
D
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F
G
H
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K
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M
A
EC
2005 Pathfinder
Wiring Diagram
UBS00KBK
BANK 1
BBWA1732E
EC-402
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER
2005 Pathfinder
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
2
G
A/F sensor 1 heater
(Bank 1)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 5V
PBIB1584E
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