Code 63 - Vehicle Speed Sensor Signal
NOTE:
See appropriate wiring diagram in L - WIRING DIAGRAM
article for terminal and connector identification.
Code 63 can be set, without a system failure, under following conditions:
- Automatic Transmission In Drive position, with brake pedal depressed and accelerator pedal depressed more than halfway for more than 3 seconds.
- Manual Transmission
Under severe climbing conditions, with vehicle stationary, accelerator pedal depressed more than halfway for more than 3 seconds, and clutch partially engaged.NOTE: Test numbers refer to numbers on diagnostic chart.
- Check for continuity between ECM 22-pin connector terminal No. 5 (White/Green wire) and ground. Disconnect speedometer cable at transmission. Tester should pulsate between open and continuity as speedometer cable is rotated slowly.NOTE: Instrument cluster has two 12-pin connectors. Ensure appropriate wire color is tested.
- Ensure continuity exists on White/Green wire between ECM 22-pin connector terminal No. 5 and instrument cluster 12-pin connector terminal No. 9. Ensure continuity exists on Black/White wire between instrument cluster 12-pin connector terminal No. 9 and ground.
- Remove instrument cluster assembly. Check continuity between terminals No. 1 and 2. Tester should pulsate between open and continuity as speedometer inner shaft is rotated slowly.