MALFUNCTION INDICATOR LIGHT DOES NOT BLINK AT A CYCLE OF 3 Hz.

/ 9-2X (9346) / 2005 / 2. Engine / ENGINE (DIAGNOSTICS), 2.0T / Malfunction Indicator Light / Fault diagnosis, fault codes / MALFUNCTION INDICATOR LIGHT DOES NOT BLINK AT A CYCLE OF 3 Hz.

DIAGNOSIS:

•

The malfunction indicator light circuit is open or shorted.

•

Test mode connector circuit is open.

TROUBLE SYMPTOM:

During inspection mode, malfunction indicator light does not blink at a cycle of 3 Hz.

WIRING DIAGRAM:

CHECK STATUS OF MALFUNCTION INDICATOR LIGHT.

Turn the ignition switch to OFF.

Disconnect the test mode connector.

Turn the ignition switch to ON. (engine OFF)

Does the malfunction indicator light come on?

Yes

Repair the malfunction indicator light circuit.

CHECK HARNESS BETWEEN COMBINATION METER AND ECM CONNECTOR.

Turn the ignition switch to OFF.

Disconnect the connector from ECM.

Turn the ignition switch to ON.

Does the malfunction indicator light come on?

Yes

Repair the ground short circuit in harness between combination meter and ECM connector.

CHECK HARNESS BETWEEN TEST MODE CONNECTOR AND CHASSIS GROUND.

Turn the ignition switch to OFF.

Disconnect the connector from ECM.

Measure the resistance of harness between test mode connector and chassis ground.

Connector & terminal

(B76) No. 1 — Chassis ground:

Is the resistance less than 1 Ω?

Yes

•

Repair the harness and connector.

•

Note
In this case, repair the following:
•	Open circuit in harness between test mode connector and chassis ground

CHECK POOR CONTACT.

Check poor contact in ECM connector.

Is there poor contact in ECM connector?

Yes

Repair the poor contact in ECM connector.

CHECK HARNESS BETWEEN ECM AND TEST MODE CONNECTOR.

Connect the test mode connector.

Measure the resistance of harness between ECM and chassis ground.

Connector & terminal

(B134) No. 14 — Chassis ground:

Is the resistance less than 1 Ω?

Yes

Repair the open circuit in harness between ECM and test mode connector.

CHECK POOR CONTACT.

Check poor contact in ECM connector.

Is there poor contact in ECM connector?

Yes

Repair the poor contact in ECM connector.

Replace the ECM.

MALFUNCTION INDICATOR LIGHT DOES NOT BLINK AT A CYCLE OF 3 Hz.

CHECK STATUS OF MALFUNCTION INDICATOR LIGHT.

Does the malfunction indicator light come on?

CHECK HARNESS BETWEEN COMBINATION METER AND ECM CONNECTOR.

Does the malfunction indicator light come on?

CHECK HARNESS BETWEEN TEST MODE CONNECTOR AND CHASSIS GROUND.

Is the resistance less than 1 Ω?

CHECK POOR CONTACT.

Is there poor contact in ECM connector?

CHECK HARNESS BETWEEN ECM AND TEST MODE CONNECTOR.

Is the resistance less than 1 Ω?

CHECK POOR CONTACT.

Is there poor contact in ECM connector?

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