JJ: Overdrive Off Indicator Never/Always ON

Pinpoint Test JJ - Overdrive Off Indicator Never/Always On

JJ1 - Check Electronic Instrument Cluster For Indicator

- Turn ignition switch to RUN.
- Wait past prove out time.
- Check electronic instrument cluster display to determine whether the indicator is always on or never on.

Is OVERDRIVE OFF indicator always on?

YES GO to JJ2.
NO GO to JJ4.

JJ2 - Check Powertrain Control Module For Shorted Circuit

- Disconnect powertrain control module.
- Check electronic instrument cluster for indicator.

Is OVERDRIVE OFF indicator illuminated?

YES GO to JJ3.
NO REPLACE powertrain control module.

JJ3 - Check Continuity Of Circuit 911 (W/LG)

- Turn ignition switch to OFF.
- Disconnect electronic instrument cluster.
- Check continuity in connector pin C1-14, circuit 911 (W/LG)

Is continuity present?

YES REPLACE electronic instrument cluster. RESTORE vehicle. RETEST system.
NO SERVICE circuit 911 (W/LG). RESTORE vehicle. RETEST system.

JJ4 - Check Powertrain Control Module For Open Circuit

- Turn ignition switch to OFF.
- Disconnect connector at powertrain control module.
- Connect a jumper wire from pin 79, circuit 911 (W/LG) at harness connector to ground.
- Turn ignition switch to RUN.
- Check electronic instrument cluster for warning.

Is OVERDRIVE OFF indicator illuminated?

YES REPLACE powertrain control module.
NO GO to JJ5.

JJ5 - Check Indicator Supply Circuit Continuity

- Remove jumper.
- Disconnect electronic instrument cluster.
- Check continuity in connector pin C1-14, circuit 911 (W/LG)

Is continuity present?

YES REPLACE electronic instrument cluster. RESTORE vehicle. RETEST system.
NO SERVICE circuit 911 (W/LG). RESTORE vehicle. RETEST system