Circuit/System Testing
- Ignition OFF, disconnect the harness connector X2 at the radio. Disconnect the harness connector X1 at the instrument panel cluster.
- Test for less than 5 ohms on the vehicle speed signal between the radio harness connector X2 terminal E and the IPC connector X1 terminal 21.
- If less than the specified range, repair the open/high resistance. If the circuit tests normal, replace the radio.