Nissan Juke Service and Repair Manual : P1643 thermoplunger control unit

DTC Logic

DTC DETECTION LOGIC

Diagnosis Procedure


Diagnosis Procedure

1.CHECK THERMOPLUNGER CONTROL UNIT POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect thermoplunger control unit harness connector.

3. Check the voltage between thermoplunger control unit harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 3.

NO >> GO TO 2.

2.DETECT MALFUNCTIONING PART

Check the following.

100A fusible link (letter B) Harness for open and short between thermoplunger control unit and battery

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

3.CHECK THERMOPLUNGER CONTROL UNIT GROUND CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.

2. Check the continuity between thermoplunger control unit harness connector and ECM harness connector.

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


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

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair open circuit or short to ground or short to power in harness or connectors.

4.CHECK INTERMITTENT INCIDENT

Refer to GI-42, "Intermittent Incident", ???INCIDENT SIMULATION TESTS??? and ???GROUND INSPECTION???.

Is the inspection result normal? YES >> Replace thermoplunger control unit.

NO >> Repair or replace.

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