P2105

P2105-ABS VALVE SUPPLY VOLTAGE CIRCUIT LOW






For the ABS circuit diagram refer to brakes, schematics and diagrams..
^ 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, a DTC is set.

Possible Causes
LOW VOLTAGE AT THE ABM
ABM INTERNAL

Diagnostic Test

1. LOW VOLTAGE AT THE ABM





With the scan tool read battery voltage and ignition 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 a half of volt?
Yes >> Replace the ABM per service information. Verification Tests
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 (A107) Fused B+, (All 1) Fused B+ and (F500) Fused ignition switch output.
Is test light bright like when connected to the battery?
Yes >> Replace the ABM per service information. Verification Tests
No >> Repair the high resistance in the circuits. Verification Tests