Nissan Pathfinder. Manual - part 514

EC-362

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1217 ENGINE OVER TEMPERATURE

>> Repair or replace malfunctioning part.

4.

CHECK RADIATOR CAP

Check radiator cap. Refer to 

CO-10, "System Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace radiator cap. Refer to 

CO-15, "Removal and Installation"

.

5.

CHECK THERMOSTAT

Check thermostat. Refer to 

CO-24, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace thermostat. Refer to 

CO-24, "Removal and Installation"

.

6.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EC-205, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace engine coolant temperature sensor. Refer to 

CO-26, "Removal and Installation"

.

7.

OVERHEATING CAUSE ANALYSIS

If the cause cannot be isolated, check the 

CO-6, "Troubleshooting Chart"

.

>> INSPECTION END

P1225 TP SENSOR

EC-363

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P1225 TP SENSOR

DTC Logic

INFOID:0000000009178275

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-364, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178276

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1. Turn ignition switch OFF.

2. Remove the intake air duct. Refer to 

EM-24, "Removal and Installation"

.

3. Check if foreign matter is caught between the throttle valve and

the housing.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside, and then perform throttle valve

closed position learning. Refer to 

EC-142, "Description"

.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator. Refer to 

EM-26, "Removal and Installation"

.

2. Go to 

EC-143, "Description"

.

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1225

CTP LEARNING-B1
(Closed throttle position learning 
performance)

Closed throttle position learning value is excessively 
low.

• Electric throttle control actuator

(TP sensor 1 and 2)

JSBIA2864ZZ

EC-364

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1226 TP SENSOR

P1226 TP SENSOR

DTC Logic

INFOID:0000000009178277

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Repeat steps 2 and 3 for 32 times.

5. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-365, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178278

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1. Turn ignition switch OFF.

2. Remove the intake air duct. Refer to 

EM-24, "Removal and Installation"

.

3. Check if foreign matter is caught between the throttle valve and

the housing.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside, and then perform throttle valve

closed position learning. Refer to 

EC-142, "Description"

.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator. Refer to 

EM-26, "Removal and Installation"

.

2. Go to 

EC-143, "Description"

.

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1226

CTP LEARNING-B1
(Closed throttle position learn-
ing performance)

Closed throttle position learning is not performed 
successfully, repeatedly.

• Electric throttle control actuator

(TP sensor 1 and 2)

JSBIA2864ZZ

P1550 BATTERY CURRENT SENSOR

EC-365

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P1550 BATTERY CURRENT SENSOR

DTC Logic

INFOID:0000000009178279

DTC DETECTION LOGIC

NOTE:

If DTC P1550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to

EC-354, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and wait at least 10 seconds.

2. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-366, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178280

1.

CHECK BATTERY CURRENT SENSOR POWER SUPPLY

1. Disconnect battery current sensor harness connector.

2. Turn ignition switch ON.

3. Check the voltage between battery current sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between battery current sensor harness connector and ECM harness connector.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1550

BAT CURRENT SENSOR
(Battery current sensor circuit 
range/performance)

The output voltage of the battery current 
sensor remains within the specified 
range while engine is running.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Battery current sensor

Battery current sensor

Ground

Voltage (V)

Connector

Terminal

F34

1

Ground

Approx. 5