Nissan Juke Service and Repair Manual : PTC branch line circuit

Diagnosis Procedure

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the PTC heater control unit for damage, bend and loose connection (unit side and connector side).

Is the inspection result normal? YES >> GO TO 2.

NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of PTC heater control unit.

2. Check the resistance between the PTC heater control unit harness connector terminals.

Is the measurement value within the specification?


Is the measurement value within the specification? YES >> GO TO 3.

NO >> Repair the PTC heater control unit branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the PTC heater control unit. Refer to HAC-280, "PTC HEATER CONTROL UNIT : Diagnosis Procedure".

Is the inspection result normal? YES (Present error)>>Replace the PTC heater control unit. Refer to HAC.

YES (Past error)>>Error was detected in the PTC heater control unit branch line.

NO >> Repair the power supply and the ground circuit.

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