Circuit/System Testing
- Ignition OFF. Disconnect the harness connector at the cellular microphone.
- Ignition ON, test for 9 - 11 volts at signal circuit terminal B.
- If greater than specified value, repair short to B+ or replace the VCIM.
- If less than specified value, repair short to ground or open/high resistance or replace the VCIM.
- Disconnect the VCIM C2 harness connector.
- Test for less than 1 volt at the cellular microphone terminal A.
- If greater than specified value, repair short to B+.
- Test for greater than 1 ohm of resistance between terminal A and ground.
- If less than specified value, repair short to ground.
- Test for less than 1 ohm of resistance between terminal A and terminal 10.
- If greater than the specified value, repair open/high resistance.
- If all circuits test normal, test or replace the cellular microphone.