Infiniti G37 Coupe. Manual — part 545
P0850 PNP SWITCH
EC-361
< COMPONENT DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0850 PNP SWITCH
Description
INFOID:0000000001734175
When the selector lever position is P or N (A/T), Neutral position (M/T), park/neutral position (PNP) switch is
ON.
ECM detects the position because the continuity of the line (the ON signal) exists.
DTC Logic
INFOID:0000000001734176
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
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 SWITCH FUNCTION
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “P/N POSI SW” in “DATA MONITOR” mode with CONSULT-III. Then check the “P/N POSI SW” sig-
nal 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-III.
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 signal of the park/neutral position (PNP)
switch is not changed in the process of engine
starting and driving.
• Harness or connectors
[The park/neutral position (PNP) switch
circuit is open or shorted.]
• Park/neutral position (PNP) switch
• TCM (A/T models)
Position (Selector lever)
Known-good signal
N or P position (A/T)
Neutral position (M/T)
ON
Except above position
OFF
EC-362
< COMPONENT DIAGNOSIS >
[VQ37VHR]
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-362, "Component Function Check"
NOTE:
Use component function check the overall function of the park/neutral position (PNP) switch 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:0000000001734177
1.
PERFORM COMPONENT FUNCTION CHECK
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000001734178
1.
INSPECTION START
Check which type of transmission the vehicle is equipped with.
Which type of transmission?
A/T
>> GO TO 2.
M/T
>> GO TO 7.
2.
CHECK DTC WITH TCM
TM-108, "Diagnosis Description"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace.
3.
CHECK STARTING SYSTEM
Turn ignition switch OFF, then turn it to START.
Does starter motor operate?
YES
>> GO TO 4.
ENG SPEED
1,400 - 6,375 rpm
COOLAN TEMP/S
More than 70
°
C (158
°
F)
B/FUEL SCHDL
2.0 - 31.8 msec
VHCL SPEED SE
More than 64 km/h (40 mph)
Selector lever
Suitable position
ECM
Ground
Condition
Voltage
Connector
Terminal
M107
109
Ground
Selector lever
P or N (A/T)
Neutral (M/T)
Approx. 0V
Except above
Battery voltage
P0850 PNP SWITCH
EC-363
< COMPONENT DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Check DTC with BCM. Refer to
DLK-50, "COMMON ITEM : CONSULT-III Function (BCM - COM-
4.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect A/T assembly harness connector.
3.
Disconnect ECM harness connector.
4.
Check the continuity between A/T assembly harness connector and ECM harness connector.
5.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F1, E3
• Harness connectors E106, M6
• Harness for open or short between A/T assembly and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
.
>> INSPECTION END
7.
CHECK PNP SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect park/neutral position (PNP) switch harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between PNP switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E3, F1
• 10A fuse (No. 43)
• IPDM E/R harness connector E7
• Harness for open or short between PNP switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between PNP switch harness connector and ECM harness connector.
A/T assembly
ECM
Continuity
Connector
Terminal
Connector
Terminal
F51
9
M107
109
Existed
PNP switch
Ground
Voltage
Connector
Terminal
F55
2
Ground
Battery voltage
EC-364
< COMPONENT DIAGNOSIS >
[VQ37VHR]
P0850 PNP SWITCH
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> GO TO 10.
10.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F103, M116
• Harness for open or short between PNP switch and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
11.
CHECK PNP SWITCH
.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Replace PNP switch.
12.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> Repair or replace.
PNP switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
F55
1
M107
109
Existed
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