C2116-ABS PUMP MOTOR SUPPLY LOW VOLTAGE

For a complete wiring diagram, refer to the Wiring Information.

NOTE:
The Electronic Stability Control (ESC) may also be referred to as Electronic Stability Program (ESP) depending on the vehicle model year and configuration. Certain components may also reference ESP, ESC, or use the traction control symbol.

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 Brake System (ABS) 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
(A917) FUSED B(+) CIRCUIT SHORTED TO GROUND, OPEN, OR HIGH RESISTANCE
(Z907) OR (Z917) GROUND CIRCUIT OPEN, OR HIGH RESISTANCE
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
PUMP MOTOR (HYDRAULIC CONTROL UNIT)

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.

1.	Turn the ignition on.

2.	With the scan tool, record and erase DTCs.

3.	Cycle the ignition switch from off to on.

4.	Road test the vehicle over 40 km/h (25 mph).

NOTE: Vehicle must be driven above 40 km/h (25 mph) for set conditions to be meet.

5.	With the scan tool, read DTCs.

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

Yes

Go To 2

Perform the ABS-INTERMITTENT CONDITION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).

2. INSPECT RELATED WIRING HARNESS, TERMINALS, AND CONNECTORS

1.	Turn the ignition off.

2.	Visually inspect the ABS Module harness connector and wiring harness for damage.

3.	Check all related wiring for pinched, chafed, pierced, and partially broken wires.

4.	Check all related connectors for broken, bent, pushed out, and corroded terminals.

Were any problems found?

Yes

Repair as necessary.
Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).

Go To 3

3. CHECK ABS PUMP MOTOR FUSE

1.	Remove and visually inspect the ABS Pump Motor fuse.

Is the fuse open?

Yes

Go To 4

Go To 5

4. CHECK (A917) FUSED B(+) CIRCUIT FOR A SHORT TO GROUND

1.	Disconnect the ABS Module harness connector.

2.	Measure the resistance of the (A917) Fused B(+) circuit between ground and the ABS Module harness connector.

Is the resistance below 10k Ohms?

Yes

Repair the (A917) Fused B(+) circuit for a short to ground.
Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).

Go To 5

5. CHECK (A917) FUSED B(+) CIRCUIT FOR AN OPEN OR HIGH RESISTANCE

1.	Replace the ABS Pump Motor fuse.

2.	Using a 12-volt test light connected to ground, probe the (A917) Fused B(+) circuit.

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

Repair the (A917) Fused B(+) circuit for an open or high resistance.
Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).

6. CHECK (Z907) OR (Z917) GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE

1.	Using a 12-volt test light connected to 12 volts, probe the (Z907) and (Z917) Ground circuit.

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

Repair (Z907) or (Z917) circuit for an open or high resistance.
Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).

7. REPLACE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE AND VERIFY IF DTC IS STILL ACTIVE

1.	Replace the Anti-Lock Brake System (ABS) Module in accordance with the Service Information.

2.	Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).

3.	Turn the ignition on.

4.	With the scan tool, read ABS DTCs.

Does this DTC reset?

Yes

Replace the Hydraulic Control Unit in accordance with the Service Information.
Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).

Perform the ABS-INTERMITTENT CONDITION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).

C2116-ABS PUMP MOTOR SUPPLY LOW VOLTAGE

C2116-ABS PUMP MOTOR SUPPLY LOW VOLTAGE

Possible Causes