Infiniti M35/M45 Y50. Manual — part 505
DTC P0850 PNP SWITCH
EC-493
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
NBS0052R
TBWT0985E
EC-494
[VQ35DE]
DTC P0850 PNP SWITCH
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
NBS0052S
1.
CHECK DTC WITH TCM
Refer to
AT-40, "OBD-II Diagnostic Trouble Code (DTC)"
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace.
2.
CHECK STARTING SYSTEM
Turn ignition switch OFF, then turn it to START.
Does starter motor operate?
Yes or No
Yes
>> GO TO 3.
No
>> Refer to
3.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1.
Turn ignition switch OFF.
2.
Disconnect A/T assembly harness connector.
3.
Disconnect “unified meter and A/C amp.” harness connector.
4.
Check harness continuity between A/T assembly terminal 9 and “unified meter and A/C amp.” terminal 2.
Refer to Wiring Diagram.
5.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M72, F102
●
Harness for open or short between A/T assembly and “unified meter and A/C amp.”
>> Repair open circuit or short to ground or short to power in harness or connectors.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
102
G
PNP switch
[Ignition switch: ON]
●
Selector lever: P or N
Approximately 0V
[Ignition switch: ON]
●
Selector lever: Except above
BATTERY VOLTAGE
(11 - 14V)
Continuity should exist.
DTC P0850 PNP SWITCH
EC-495
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
5.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 102 and “unified meter and A/C amp.” terminal 21.
Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-III
1.
Check harness continuity between A/T assembly terminal 9 and TCM terminal 8.
Refer to
AT-108, "DTC P0615 START SIGNAL CIRCUIT"
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK INTERMITTENT INCIDENT
Refer to
EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
8.
REPLACE “UNIFIED METER AND A/C AMP.”
Refer to
DI-28, "UNIFIED METER AND A/C AMP"
.
>> INSPECTION END
Continuity should exist.
Continuity should exist.
EC-496
[VQ35DE]
DTC P1148, P1168 CLOSED LOOP CONTROL
DTC P1148, P1168 CLOSED LOOP CONTROL
PFP:22690
On Board Diagnosis Logic
NBS0052T
These self-diagnoses have the one trip detection logic.
NOTE:
DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1.
Perform the trouble diagnosis for the corresponding DTC.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1148
1148
(Bank 1)
Closed loop control
function
The closed loop control function for bank 1
does not operate even when vehicle is driving
in the specified condition.
●
Harness or connectors
(The A/F sensor 1 circuit is open or
shorted.)
●
A/F sensor 1
●
A/F sensor 1 heater
P1168
1168
(Bank 2)
The closed loop control function for bank 2
does not operate even when vehicle is driving
in the specified condition.
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