Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

REMOTE RADIO SWITCH CIRCUIT OPEN - DIAGNOSTIC PROCEDURE

TEST	ACTION
1	Turn the ignition on. NOTE: Make sure the DRB can communicate with the Radio before continuing. With the DRBIII(R), erase the CTM DTC's. Cycle the ignition switch from off to on and wait 10 seconds. With the DRBIII(R), read the CTM DTC's. Did this DTC reset? Yes --> Go To 2 No --> Refer to the SYSTEM WIRING DIAGRAMS to help isolate a possible intermittent open or short. Perform BODY VERIFICATION TEST - VER 1 .
2	WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait 2 minutes before proceeding. CAUTION: Do not place an intact undeployed airbag module face down on a hard surface, the airbag module will propel into the air if accidently deployed. Remove the Driver Airbag Module.Disconnect either remote radio switch harness connector.Turn the ignition on, reconnect the battery.Measure the voltage between the Radio Control MUX circuit and the ground circuit at the remote radio switch connector.Is the voltage above 3.6 volts? Yes --> Go To 3 No --> Go To 5
3	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Turn the ignition on. Measure the voltage of the Radio Control MUX circuit at the clockspring C1 harness connector. Is the voltage above 5.0 volts? Yes --> Go To 4 No --> Repair the radio control MUX circuit for a short to voltage between the clockspring and the splice. If OK, replace the clockspring. Perform BODY VERIFICATION TEST - VER 1 .
4	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Disconnect the CTM C1 harness connector. Turn the ignition on. Measure the voltage of the Radio Control MUX circuit at the clockspring C1 harness connector. Is the voltage above 5.0 volts? Yes --> Repair the radio control MUX circuit for a short to voltage between the CTM and the Clockspring. Perform BODY VERIFICATION TEST - VER 1 . No --> Replace the Central Timer Module in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .
5	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Turn the ignition on. Turn the Radio on. Connect a jumper wire between the Radio Control MUX circuit (cav 1) and the Ground circuit (cav 2). Did the radio change stations? Yes --> Repair the ground circuit or the radio control MUX circuit for an open between the clockspring and the splice. If OK, replace the Clockspring. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 6
6	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Measure the resistance between ground and the Ground circuit at the Clockspring C1 harness connector cavity 2. Is the resistance below 5.0 ohms? Yes --> Go To 7 No --> Repair the Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1 .
7	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Disconnect the CTM C1 harness connector. Measure the resistance of the Radio Control MUX circuit between the CTM C1 connector and the Clockspring C1 connector. Is the resistance below 5.0 ohms? Yes --> Go To 8 No --> Repair the Radio Control MUX circuit for an open between the clockspring and the CTM. Perform BODY VERIFICATION TEST - VER 1 .
8	If there are no possible causes remaining, view repair. Repair Replace the Central Timer Module in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .