C2105

C2105-ABS VALVE SUPPLY VOLTAGE CIRCUIT LOW





For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
Continuously.

- Set Condition:
The monitor function test the supply voltage of the valves via the valve feedback lines. If three or more valve response faults occur simultaneously or battery voltage and relay voltage differ by 0.8 volts for 500 mSec, a DTC is set.





Diagnostic Test

1. LOW VOLTAGE AT THE ABM
With the scan tool read ABS Valve Feed and Power Supply Voltage in the ABM and compare the two reading to actual battery voltage from a voltmeter.

NOTE: Battery must be fully charged.

Are all readings within.8 of a volt?

Yes

- Replace the ABM.
- PERFORM ABS VERIFICATION TEST. ABS Verification Test

No

- Go To 2


2. ABM INTERNAL
Turn key off.
Disconnect the ABM harness connector.

NOTE: Check connector - Clean/repair as necessary.

Turn key on, engine off.
With a test light check (A111) Fused B+ and (F500) Fused ignition switch output.

Is test light bright like when connected to the battery?

Yes

- Replace the ABM.
- PERFORM ABS VERIFICATION TEST. ABS Verification Test

No

- Repair the high resistance in the circuits.
- PERFORM ABS VERIFICATION TEST. ABS Verification Test