ENGINE (DIAGNOSTICS)(H4DOTC DIESEL) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P1560 BACK-UP VOLTAGE CIRCUIT MALFUNCTION

DTC DETECTING CONDITION:

Immediately at fault recognition

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode and Inspection Mode .

WIRING DIAGRAM:

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1.CHECK INPUT SIGNAL OF ECM.

1) Turn the ignition switch to OFF.

2) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B135) No. 1 (+) — Chassis ground (−):

Is the voltage 10 V or more?

Repair the poor contact of ECM connector.

2.CHECK HARNESS BETWEEN ECM AND MAIN FUSE BOX CONNECTOR.

1) Disconnect the connector from ECM.

2) Measure the resistance between ECM connector and chassis ground.

Connector & terminal

(B135) No. 1 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the short circuit to ground in harness between ECM connector and battery terminal.

3.CHECK FUSE NO. 13.

Is the fuse blown out?

Replace the fuse.

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit in harness between ECM connector and battery

• Poor contact of ECM connector

• Poor contact of battery terminal