C2116–ABS PUMP MOTOR SUPPLY LOW VOLTAGE
For a complete wiring diagram Refer to Section 8W.
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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.
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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
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WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
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ABS PUMP MOTOR FUSE OPEN
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(A107) FUSED B(+) CIRCUIT SHORTED TO GROUND, OPEN, OR HIGH RESISTANCE
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(Z127) OR (Z107) GROUND CIRCUIT OPEN, OR HIGH RESISTANCE
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ANTI-LOCK BRAKES MODULE
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PUMP MOTOR (HYDRAULIC CONTROL UNIT)
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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.
Turn the ignition on.
With the scan tool, record and erase DTCs.
Cycle the ignition switch from off to on.
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.
With the scan tool, read DTCs.
Does the scan tool display: C2116–ABS PUMP MOTOR SUPPLY LOW VOLTAGE?
Yes
No
Diagnostic Test
2.
INSPECT RELATED WIRING HARNESS, TERMINALS, & CONNECTORS
Turn the ignition off.
Visually inspect the Anti-Lock Brakes Module harness connector and wiring harness for damage.
Check all related wiring for pinched, chafed, pierced, and partially broken wires.
Check all related connectors for broken, bent, pushed out, and corroded terminals.
Were any problems found?
Yes
No
3.
CHECK ABS PUMP MOTOR FUSE
Remove and visually inspect the ABS Pump Motor fuse.
Is the fuse open?
Yes
No
4.
CHECK (A107) FUSED B(+) CIRCUIT FOR A SHORT TO GROUND
Disconnect the Anti-Lock Brakes Module harness connector.
Measure the resistance of the (A107) Fused B(+) circuit between ground and the Anti-Lock Brakes Module harness connector.
Is the resistance below 10k ohms?
Yes
No
5.
CHECK (A107) FUSED B(+) CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
Replace the ABS Pump Motor fuse.
Using a 12-volt test light connected to ground, probe the (A107) 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
No
6.
CHECK (Z127) OR (Z107)GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
Using a 12-volt test light connected to 12 volts, probe the (Z127) and (Z107) 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
No
7.
REPLACE ANTI-LOCK BRAKES MODULE & VERIFY IF DTC IS STILL ACTIVE
Replace the Anti-Lock Brakes Module in accordance with the Service Information.
Perform ABS VERIFICATION TEST.
(Refer to 5 - BRAKES - STANDARD PROCEDURE).
Turn the ignition on.
With the scan tool, read ABS DTCs.
Does this DTC reset?
Yes
No