C2116-ABS PUMP MOTOR SUPPLY LOW VOLTAGE

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition on.
Set Condition:
When the Anti-Lock Brake Module indicates the ABS Pump Motor circuit fails the diagnostic test.

Possible Causes

WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE

ABS PUMP MOTOR FUSE OPEN

(A107) FUSED B(+) CIRCUIT SHORTED TO GROUND OR OPEN

GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE

ANTI-LOCK BRAKE MODULE

Diagnostic Test

1.CHECK FOR A DTC C2116-ABS PUMP MOTOR SUPPLY LOW VOLTAGE

NOTE: This DTC must be active for the results of this test to be valid.

CAUTION: Ensure braking capability is available before road testing.

Does the scan tool display: C2116-ABS PUMP MOTOR SUPPLY LOW VOLTAGE?

Yes

Go To 2

Refer to the INTERMITTENT CONDITION diagnostic procedure.
Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TESTING)

2.CHECK ABS PUMP OPERATION WITH SCAN TOOL

Did the ABS Pump Motor operate?

Yes

Refer to the INTERMITTENT CONDITION diagnostic procedure.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).

Go To 3

3.CHECK THE ABS PUMP MOTOR FUSE FOR AN OPEN

Is the ABS Pump Motor fuse open?

Yes

Go To 4

Go To 5

4.CHECK THE (A107) FUSED B(+) FOR A SHORT TO GROUND

Is the (A107) Fused B(+) circuit in the wiring harness OK?

Yes

Go To 5

Repair the (A107) Fused B(+) circuit as necessary. Replace the fuse.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).

5.CHECK THE WIRING HARNESS, TERMINALS, AND CONNECTORS

NOTE: Check all related wiring for bruised, chafed, pierced, or partially broken wires. Check all related connectors for broken, bent, pushed out, or corroded terminals.

Were any problems found?

Yes

Repair as necessary.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).

Go To 6

6.(A107) FUSED B(+) CIRCUIT OPEN

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes

Go To 7

Repair the (A107) Fused B(+) circuit for an open circuit or high resistance.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).

7.GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes

Replace the Anti-Lock Brake Module in accordance with the Service Information.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).

Repair the Ground circuit(s) for an open circuit or high resistance.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).