Disconnect the Cluster connectors and inspect for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Reconnect the connectors.
Connect the GDS and go to “Current Data”.
Monitor MIL values in Current Data, check and wiggle the harness(es), connector(s), and terminal(s).
Any change in the values indicates a poor connection. Was a connector problem found?
![]() | ▶ Repair the connector. Go to "Verification of Vehicle Repair" procedure. |
![]() | ▶ Go to "Control Circuit Inspection" procedure. |
IG "OFF".
Disconnect PCM/ECM harness connector.
IG "ON".
Using a suitable wire, jumper the terminal 92 of the PCM/ECM harness connector to chassis ground.
Is MIL bulb illuminated?
![]() | ▶ Go to next step as below |
![]() | ▶ Remove instrument cluster and inspect MIL bulb. If it is burned out, replace bulb. If bulb is okay, locate source of open between bulb and Meter Fuse. Repair as necessary and go to "Verification of Vehicle Repair" procedure |
Remove wire from PCM/ECM harness connector
Does MIL bulb go out?
![]() | ▶ Check for poor connection between PCM/ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure |
![]() | ▶ Check for source of short to GND between bulb and PCM/ECM. Repair as necessary and go to "Verification of Vehicle Repair" procedure |