C2116–ABS PUMP MOTOR SUPPLY LOW VOLTAGE
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition on and the ABS Pump Motor deactivated, but not if supply voltage faults are detected.
Or, if the control is switched off.
- Set Condition:
If the Anti-Lock Brakes Module detects either a low voltage condition when the ABS Pump Motor is activated or deactivated or a high voltage condition when the ABS Pump Motor is deactivated.
| Possible Causes |
| WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE |
| ABS PUMP MOTOR FUSE OPEN |
| (A107) FUSED B(+) CIRCUIT SHORTED TO GROUND, OPEN, OR HIGH RESISTANCE |
| (Z127) OR (Z107) GROUND CIRCUIT OPEN, OR HIGH RESISTANCE |
| ANTI-LOCK BRAKES MODULE |
| PUMP MOTOR (HYDRAULIC CONTROL UNIT) |
Diagnostic Test
1.CHECK FOR A DTC C2116–ABS PUMP MOTOR SUPPLY LOW VOLTAGENOTE: This DTC must be active for the results of this test to be valid.
NOTE: Vehicle must be driven above 40 km/h (25 mph) for set conditions to be meet.
Does the scan tool display: C2116–ABS PUMP MOTOR SUPPLY LOW VOLTAGE?
Yes
- Go To 2
No
- Perform the ABS Intermittent Condition diagnostic procedure in this Section.
- Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TESTING)
Diagnostic Test
2.INSPECT RELATED WIRING HARNESS, TERMINALS, & CONNECTORSWere any problems found?
Yes
- Repair as necessary.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
- Go To 3
3.CHECK ABS PUMP MOTOR FUSE
Is the fuse open?
Yes
- Go To 4
No
- Go To 5
4.CHECK (A107) FUSED B(+) CIRCUIT FOR A SHORT TO GROUND
Is the resistance below 10k ohms?
Yes
- Repair the (A107) Fused B(+) circuit for a short to ground.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
- Go To 5
5.CHECK (A107) FUSED B(+) CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
NOTE: The test light should illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light illuminate brightly?
Yes
- Go To 6
No
- Repair the (A107) Fused B(+) circuit for an open or high resistance.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
6.CHECK (Z127) OR (Z107)GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
NOTE: The test light should illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light illuminate brightly on both circuits?
Yes
- Go To 7
No
- Repair (Z127) or (Z107) circuit for an open or high resistance.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
7.REPLACE ANTI-LOCK BRAKES MODULE & VERIFY IF DTC IS STILL ACTIVE
(Refer to 5 - BRAKES - STANDARD PROCEDURE)
Does this DTC reset?
Yes
- Replace the Hydraulic Control Unit in accordance with the Service Information.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
- Perform the ABS Intermittent Condition diagnostic procedure in this Section.
- Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TESTING)