Check the vehicle for Diagnostic Trouble Codes (DTCs).

Are any DTCs present?

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Go to Diagnostic Trouble Code (DTC) List in Engine Controls

Go to Step 2

1. Disconnect the Powertrain Control Module (PCM) connector C2.
2. Connect a fused (3 amp) jumper between the PCM harness connector C2 terminal 5 and ground.

Is the SERVICE ENGINE SOON indicator on?

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Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls

Go to Step 3

Check for a poor connection or open in CKT 419.

Is there a poor connection or an open in CKT 419?

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Go to Step 4

Go to Step 5

Repair the poor connection or open in CKT 419.

Has the repair been made and the system rechecked?

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System OK

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1. Check the SERVICE ENGINE SOON indicator bulb and bulb connection.
2. If OK, replace the instrument cluster. Refer to Instrument Cluster Replacement .

Has the repair been made and the system rechecked?

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System OK

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