Circuit/System Testing
NOTE:
The ignition circuit supplied by the radio controls the Display Module, Display Module Actuator, Antenna module, and Audio Amplifier (UQA). Each of the modules/components will need to be disconnected if the ignition circuit test fails for a short to voltage or short to ground. Disconnect one module/component at a time while testing the ignition circuit for a short to voltage or short to ground. If the fault is no longer present when disconnecting a module/component replace that module/component. If the fault is still present with all the modules/components disconnected, repair the circuit.
Display Power/Display Actuator Malfunction
- Ignition OFF, disconnect one of the connectors listed below at an inoperative module/component:
- Antenna Module
- Radio/HVAC Display X1
- Radio/HVAC Display X2
- Audio Amplifier X3 (UQA only)
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal listed below and ground.
- Antenna Module - terminal 1
- Radio/HVAC Display X1 - terminal 4
- Radio/HVAC Display X2 - terminal 3
- Audio Amplifier (UQA only) - terminal 8
- If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the radio.
- If all circuits test normal, replace the module/component that was disconnected in step 1.