Nissan Frontier D40. Manual - part 518

P0850 PNP SWITCH

EC-763

< COMPONENT DIAGNOSIS >

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1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 102 and combination meter terminal 7.
Refer to Wiring Diagram.

3.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E152, M31
• Harness for open or short between ECM and combination meter

>> Repair open circuit or short to ground or short to power in harness or connectors.

7.

CHECK PNP INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-III

1.

Check harness continuity between A/T assembly terminal 9 and TCM terminal 8.
Refer to Wiring Diagram.

2.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 8.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-46, "Intermittent Incident"

.

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace.

9.

REPLACE COMBINATION METER

Refer to 

MWI-4, "METER SYSTEM : System Diagram"

.

>> INSPECTION END

M/T MODELS

1.

CHECK PNP SWITCH GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect park/neutral position (PNP) switch harness connector.

3.

Check harness continuity between PNP switch terminal 2 and ground.
Refer to Wiring Diagram.

4.

Also check harness for short to power.

OK or NG

OK

>> GO TO 3

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F14, E5
• Harness for open or short between PNP switch and ground

Continuity should exist.

Continuity should exist.

Continuity should exist.

EC-764

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0850 PNP SWITCH

>> Repair open circuit or short to power in harness or connectors.

3.

CHECK PNP SWITCH INPUT SIGNAL CIRCUIT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 102 and PNP switch terminal 1.
Refer to Wiring Diagram.

3.

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 E5, F14
• 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.

5.

CHECK PNP SWITCH

Refer to 

EC-897, "Wiring Diagram"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace PNP switch.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-46, "Intermittent Incident"

.

>> INSPECTION END

Continuity should exist.

P1148, P1168 CLOSED LOOP CONTROL

EC-765

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P1148, P1168 CLOSED LOOP CONTROL

On Board Diagnosis Logic

INFOID:0000000005273752

These self-diagnoses have the one trip detection logic.

DTC P1148 or P1168 is displayed with another DTC for air fuel ratio (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 being driven 
in the specified condition.

• Harness or connectors

[The air fuel ratio (A/F) sensor 1 circuit is 
open or shorted.]

• Air fuel ratio (A/F) sensor 1
• Air fuel ratio (A/F) sensor 1 heater

P1168
1168
(Bank 2)

The closed loop control function for bank 2 does 
not operate even when vehicle is being driven 
in the specified condition.

EC-766

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[VQ40DE]

P1211 TCS CONTROL UNIT

P1211 TCS CONTROL UNIT

Description

INFOID:0000000005273753

The malfunction information related to TCS is transferred through the CAN communication line from “ABS
actuator and electric unit (control unit)” to ECM.
Be sure to erase the malfunction information such as DTC not only for “ABS actuator and electric unit
(control unit)” but also for ECM after TCS related repair.

On Board Diagnosis Logic

INFOID:0000000005273754

Freeze frame data is not stored in the ECM for this self-diagnosis. The MIL will not illuminate for this
self-diagnosis.

DTC Confirmation Procedure

INFOID:0000000005273755

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5V at idle.

1.

Start engine and let it idle for at least 60 seconds.

2.

Check 1st trip DTC.

3.

If 1st trip DTC is detected, go to 

EC-766, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005273756

Go to 

BRC-10, "Work Flow"

 or 

BRC-185, "Work Flow"

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DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1211
1211

TCS control unit

ECM receives malfunction information from 
“ABS actuator and electric unit (Control unit)”.

• ABS actuator and electric unit (control 

unit)

• TCS related parts