Possible Cause
- ABS/TCS control module malfunction.
- Open circuit between ABS/TCS/HU/CM terminal "R" and PCM terminal "1Q".
- Short to ground circuit between ABS/TCS/HU/CM terminal "R" and PCM terminal "1Q".
- Short to power circuit between ABS/TCS/HU/CM terminal "R" and PCM terminal "1Q".
- Poor connection at ABS/TCS/HU/CM or PCM connector.
- PCM malfunction.