Nissan Maxima. Manual — part 478
EC-396
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0643 SENSOR POWER SUPPLY
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 8.
8.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly. Refer to
ACC-3, "Removal and Installation"
2. Go to
EC-469, "Special Repair Requirement"
.
>> INSPECTION END
9.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
>> INSPECTION END
P0850 PNP SWITCH
EC-397
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0850 PNP SWITCH
Description
INFOID:0000000010095080
When the selector lever position is P or N, park/neutral position (PNP) signal from the TCM is sent to ECM.
DTC Logic
INFOID:0000000010095081
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
INSPECTION START
Will CONSULT be used?
Will CONSULT be used?
YES
>> GO TO 2.
NO
>> GO TO 5.
2.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
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.
>> GO TO 3.
3.
CHECK PNP SIGNAL
With CONSULT
1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode with CONSULT. Then check the “P/N POSI SW” signal
under the following conditions.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Go to
4.
PERFORM DTC CONFIRMATION PROCEDURE
1. Select “DATA MONITOR” mode with CONSULT.
2. Start engine and warm it up to normal operating temperature.
3. Maintain the following conditions for at least 50 consecutive seconds.
CAUTION:
Always drive vehicle at a safe speed.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0850
Park/neutral position
switch
The park/neutral position (PNP) signal does not
change during driving after the engine is start-
ed.
• Harness or connectors
(The sensor circuit is open or shorted.)
• TCM
Position (Selector lever)
Known-good signal
N or P position
ON
Except above position
OFF
ENG SPEED
1,100 - 6,375 rpm
COOLAN TEMP/S
More than 70
°C (158°F)
B/FUEL SCHDL
4.0 - 31.8 msec
EC-398
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0850 PNP SWITCH
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
5.
PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to
EC-398, "Component Function Check"
NOTE:
Use component function check to check the overall function of the park/neutral position (PNP) signal circuit.
During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Component Function Check
INFOID:0000000010095082
Regarding Wiring Diagram information, refer to
.
1.
PERFORM COMPONENT FUNCTION CHECK
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connectors.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000010095083
Regarding Wiring Diagram information, refer to
.
1.
CHECK DTC WITH TCM
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning part.
2.
CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect TCM harness connector.
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between TCM harness connector and IPDM E/R harness connector.
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 3.
VHCL SPEED SE
More than 64 km/h (40 mph)
Selector lever
Suitable position
ECM
Condition
Voltage
Connector
+
–
Terminal
Terminal
E10
102
112
Selector lever
P or N
Battery voltage
Except above
Approx. 0 V
JMBIA1874ZZ
TCM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F15
20
F10
72
Existed
P0850 PNP SWITCH
EC-399
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect IPDM E/R harness connectors.
2. Disconnect ECM harness connector.
3. Check the continuity between ECM harness connector and IPDM E/R harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Junction block harness connectors E45, E50
• Harness for open or short between ECM and IPDM E/R
>> Repair or replace harness or connectors.
5.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-35, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning part.
ECM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
E10
102
E18
30
Existed
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