Nissan Pathfinder (2012 year). Instruction — part 278
P0550 PSP SENSOR
EC-305
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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2.
CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect power steering pressure (PSP) sensor harness con-
nector.
2. Turn ignition switch ON.
3. Check voltage between PSP sensor terminal 3 and ground with
CONSULT or tester.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
3.
CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between PSP sensor terminal 1 and ECM terminal 67.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 12 and PSP sensor terminal 2.
2. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK PSP SENSOR
EC-306, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace PSP sensor. Refer to
ST-25, "Removal and Installation"
6.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
BBIA0552E
Voltage: Approximately 5V
PBIB1872E
Continuity should exist.
Continuity should exist.
August 2012
2012 Pathfinder
EC-306
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0550 PSP SENSOR
Component Inspection
INFOID:0000000007358232
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.
Condition
Voltage
Steering wheel: being turned
0.5 - 4.5V
Steering wheel: not being turned
0.4 - 0.8V
MBIB0126E
August 2012
2012 Pathfinder
P0603 ECM POWER SUPPLY
EC-307
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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P0603 ECM POWER SUPPLY
Component Description
INFOID:0000000007358233
Battery voltage is supplied to the ECM even when the ignition switch
is turned OFF for the ECM memory function of the DTC memory, the
air-fuel ratio feedback compensation value memory, the idle air vol-
ume learning value memory, etc.
On Board Diagnosis Logic
INFOID:0000000007358234
DTC Confirmation Procedure
INFOID:0000000007358235
1. If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON, wait at least 10 seconds.
3. Turn ignition switch OFF, wait at least 5 minutes.
4. Turn ignition switch ON, wait at least 10 seconds.
5. Repeat steps 2 to 3 for 5 times.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000007358236
1.
CHECK ECM POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check voltage between ECM terminal 121 and ground with
CONSULT or tester.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
PBIB1164E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0603
0603
ECM power supply cir-
cuit
ECM back up RAM system does not function
properly.
• Harness or connectors
[ECM power supply (back up) circuit is
open or shorted.]
• ECM
Voltage: Battery voltage
MBIB0026E
August 2012
2012 Pathfinder
EC-308
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0603 ECM POWER SUPPLY
Check the following.
• 20 A fuse(No.53)
• IPDM E/R harness connector E121
• Harness for open or short between ECM and battery
>> Repair open circuit in harness or connectors.
3.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness or connectors.
4.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn ignition switch ON.
2. Select “SELF DIAG RESULTS” mode with CONSULT.
3. Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
EC-307, "DTC Confirmation Procedure"
5. Is the 1st trip DTC P0603 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3.
Perform DTC Confirmation Procedure.
EC-307, "DTC Confirmation Procedure"
4. Is the 1st trip DTC P0603 displayed again?
Yes or No
Yes
>> GO TO 5.
No
>>
INSPECTION END
5.
REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. Refer to
SEC-10, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"
(with Intelligent Key system) or
SEC-120, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
(without Intelligent Key system).
3. Perform
4. Perform
EC-25, "Accelerator Pedal Released Position Learning"
5. Perform
EC-25, "Throttle Valve Closed Position Learning"
.
6. Perform
EC-25, "Idle Air Volume Learning"
>>
INSPECTION END
August 2012
2012 Pathfinder
P0605 ECM
EC-309
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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P0605 ECM
Component Description
INFOID:0000000007358237
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
INFOID:0000000007358238
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
INFOID:0000000007358239
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 perform the following before conduct-
ing the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
PROCEDURE FOR MALFUNCTION A
1. Turn ignition switch ON.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to
PROCEDURE FOR MALFUNCTION B
With CONSULT
1. Turn ignition switch ON and wait at least 1 second.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to
PROCEDURE FOR MALFUNCTION C
With CONSULT
1. Turn ignition switch ON and wait at least 1 second.
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.
August 2012
2012 Pathfinder
EC-310
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0605 ECM
2. Turn ignition switch OFF, wait at least 10 seconds, and then turn it ON.
3. Repeat step 2 for 32 times.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000007358240
1.
INSPECTION START
With CONSULT
1. Turn ignition switch ON.
2. Select “SELF DIAG RESULTS” mode with CONSULT.
3. Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
EC-309, "DTC Confirmation Procedure"
5. Is the 1st trip DTC P0605 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3.
Perform DTC Confirmation Procedure.
EC-309, "DTC Confirmation Procedure"
4. Is the 1st trip DTC P0605 displayed again?
Yes or No
Yes
>> GO TO 2.
No
>>
INSPECTION END
2.
REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-10, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"
(with Intelligent Key system) or
SEC-120, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
(without Intelligent Key system).
3. Perform
4. Perform
EC-25, "Accelerator Pedal Released Position Learning"
5. Perform
EC-25, "Throttle Valve Closed Position Learning"
.
6. Perform
EC-25, "Idle Air Volume Learning"
>>
INSPECTION END
August 2012
2012 Pathfinder
P0607 ECM
EC-311
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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P0607 ECM
Description
INFOID:0000000007358241
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
On Board Diagnosis Logic
INFOID:0000000007358242
This self-diagnosis has the one trip detection logic.
DTC Confirmation Procedure
INFOID:0000000007358243
1. Turn ignition switch ON.
2. Check DTC.
3. If DTC is detected, go to
.
Diagnosis Procedure
INFOID:0000000007358244
1.
INSPECTION START
With CONSULT
1. Turn ignition switch ON.
2. Select “SELF-DIAG RESULTS” mode with CONSULT.
3. Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
EC-311, "DTC Confirmation Procedure"
5. Is the DTC P0607 displayed again?
With GST
1. Turn ignition switch ON.
2. Select “Service $04” with GST.
3.
Perform DTC Confirmation Procedure.
EC-311, "DTC Confirmation Procedure"
4. Is the DTC P0607 displayed again?
Yes or No
Yes
>> GO TO 2.
No
>>
INSPECTION END
2.
REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-10, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"
(with Intelligent Key system) or
SEC-120, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
(without Intelligent Key system).
3. Perform
4. Perform
EC-25, "Accelerator Pedal Released Position Learning"
5. Perform
EC-25, "Throttle Valve Closed Position Learning"
.
6. Perform
EC-25, "Idle Air Volume Learning"
>>
INSPECTION END
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
U0607
0607
CAN communication bus
When detecting error during the initial diagno-
sis of CAN controller of ECM.
• ECM
August 2012
2012 Pathfinder
EC-312
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0643 SENSOR POWER SUPPLY
P0643 SENSOR POWER SUPPLY
On Board Diagnosis Logic
INFOID:0000000007358245
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL illuminates.
DTC Confirmation Procedure
INFOID:0000000007358246
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
1. Start engine and let it idle for 1 second.
2. Check 1st trip DTC.
3. If DTC is detected, go to
.
Diagnosis Procedure
INFOID:0000000007358247
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground three screws on the body. Refer to
.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P0643
0643
Sensor power supply
circuit short
ECM detects that the voltage of power
source for sensor is excessively low or high.
• Harness or connectors
(APP sensor 1 circuit is shorted.)
(PSP sensor circuit is shorted.)
(Refrigerant pressure sensor circuit is short-
ed.)
(Battery current sensor circuit is shorted.)
(EVAP control system pressure sensor circuit
is shorted.)
• Accelerator pedal position sensor
(APP sensor 1)
• EVAP control system pressure sensor
• Power steering pressure sensor
• Refrigerant pressure sensor
• Battery current sensor
Engine operation condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.
BBIA0539E
August 2012
2012 Pathfinder
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