Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the A10 inside rearview mirror.
- Test for less than 10 Ω between the appropriate ground circuit terminal listed below and ground:
- Terminal 5 (-UVC)
- Terminal 8 (UVC)
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Test for 500-900 Ω between the appropriate signal circuit terminal listed below and ground:
- Terminal 3 (-UVC)
- Terminal 11 (UVC)
- If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the K73 telematics communication interface control module.
- If greater than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the K73 telematics communication interface control module.
- Ignition ON, test for less than 1 V between the signal circuit listed below and ground.
- Terminal 3 (-UVC)
- Terminal 11 (UVC)
- If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K73 telematics communication interface control module.
- Test for 8.5-10.5 V between the appropriate 10 V reference circuit terminal listed below and ground:
- Terminal 4 (-UVC)
- Terminal 12 (UVC)
- If less than the specified range, test the 10 V reference circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K73 telematics communication interface control module.
- If greater than the specified range, test the 10 V reference circuit for a short to voltage. If the circuit tests normal, replace the K73 telematics communication interface control module.
- If all circuits test normal, test or replace the A10 rearview mirror.