ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P1518 STARTER SWITCH CIRCUIT LOW INPUT

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:

Failure of engine to start

CAUTION:

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

WIRING DIAGRAM:

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1.CHECK FOR ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Check DTC using “List of Diagnostic Trouble Code (DTC)”.

2.CHECK HARNESS BETWEEN ECM AND STARTER RELAY CONNECTOR.

1) Turn the ignition switch to OFF.

2) Remove the starter relay.

3) Disconnect the connectors from ECM, starter relay and starter motor.

4) Measure the resistance of harness between ECM and starter relay connector.

NOTE:

For AT model, place the select lever in “P” range or “N” range.

Connector & terminal

Euro 4 LHD model

(B135) No. 21 — (B225) No. 10:

Euro 4 RHD model

(B135) No. 21 — (B225) No. 25:

Euro 5 LHD model

(B136) No. 34 — (B225) No. 10:

Euro 5 RHD model

(B136) No. 34 — (B225) No. 25:

Is the resistance less than 1 Ω?

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit of harness between ECM and starter relay connector

• Poor contact of coupling connector (RHD model)

3.CHECK HARNESS BETWEEN ECM AND STARTER RELAY CONNECTOR.

Measure the resistance between ECM and chassis ground.

Connector & terminal

Euro 4 model

(B135) No. 21 — Chassis ground:

Euro 5 model

(B136) No. 34 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the poor contact of ECM connector.

Repair the short circuit to ground in harness between ECM and starter relay connector.