TSB : Circuit/System Testing

Details

Vehicle OFF and all vehicle systems OFF, disconnect the connector at the A26 Heater and Air Conditioning User Interface Control - Front and the X1 connector at the A22 Radio Control. It may take up to 10 min for all vehicle systems to power down. Vehicle in Service Mode. Test for less than 1 V between the signal circuit terminal 5 and ground. If greater than 1 V Repair the short to voltage on circuit 11766 Go to next step: If less than 1 V Vehicle OFF and all vehicle systems OFF. Test for infinite resistance between signal circuit terminal 5 and ground If less than infinite resistance Repair the short to ground on circuit 11766 Go to next step: If infinite resistance Test for less than 2 Ω in circuit 11766 end to end If greater than 2 Ω Repair the open/high resistance on circuit 11766 Go to next step: If greater than 2 Ω Replace the A26 Heater and Air Conditioning User Interface Control - Front. Connect all connectors. Verify the DTC does not set or the symptom does not occur while operating the vehicle within the Conditions for Running the DTC. If the DTC or symptom is not corrected Replace the A22 Radio control Go to next step: If the DTC or symptom is corrected All OK