Diagnostic Test

WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR A DTC C1073-ABS PUMP MOTOR CONTROL CIRCUIT
NOTE: This DTC must be active for the results of this test to be valid. If present, diagnose and repair DTC C2116-ABS PUMP MOTOR SUPPLY LOW VOLTAGE before diagnosing this DTC.

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.

NOTE: The Anti-Lock Brake Module must sense ALL 4 wheels at 12 km/h (7.5 mph) before it will extinguish the ABS indicators.

Does the scan tool display: C1073-ABS PUMP MOTOR CONTROL CIRCUIT?

Yes
1. Go To 2.
No
1. Refer to the ABS INTERMITTENT CONDITION diagnostic procedure.
INSPECT RELATED WIRING HARNESS, TERMINALS, & CONNECTORS
Turn the ignition off.

Visually inspect the related wiring harness. Look for any pinched, chafed, pierced, and partially broken wires.

Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, and corroded terminals.

Were any problems found?

Yes
1. Repair as necessary.
2. Perform ABS VERIFICATION TEST .
No
1. Go To 3.
CHECK THE ABS PUMP MOTOR FUSED B+ FOR AN OPEN
Turn the ignition off.

Remove and visually inspect the ABS Pump Motor B+ fuse.

Is the ABS Pump Motor B+ fuse open?

Yes
1. Go To 4.
No
1. Go To 6.
CHECK THE (A107) FUSED B(+) FOR A SHORT TO GROUND

Fig 1: Checking (A107) Fused B(+) For A Short To Ground
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Anti-Lock Brake Module harness connector.

Using a 12-volt test light connected to 12-volts, probe the (A107) Fused B+ circuit.

Does the test light illuminate brightly?

Yes
1. Repair the (A107) Fused B(+) circuit for a short to ground.
2. Perform ABS VERIFICATION TEST .
No
1. Go To 5.
CHECK THE (A107) FUSED B(+) CIRCUIT
Turn the ignition off.

Visually inspect the (A107) Fused B(+) circuit in the wiring harness.

Look for any signs of intermittent short to ground.

Is the wiring harness OK?

Yes
1. Go To 6.
No
1. Repair the (A107) Fused B(+) circuit for a short to ground.
2. Perform ABS VERIFICATION TEST .
CHECK THE VOLTAGE ON THE (A107) FUSED B(+) CIRCUIT

Fig 2: Checking Voltage On (A107) Fused B(+) Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Anti-Lock Brake Module harness connector.

Measure the voltage of the (A107) Fused B(+) circuit in the Anti-Lock Brake Module harness connector.

Is the voltage above 10 volts?

Yes
1. Go To 7.
No
1. Repair the (A107) Fused B(+) circuit for an open.
2. Perform ABS VERIFICATION TEST .
CHECK THE (Z931) GROUND CIRCUITS FOR AN OPEN

Fig 3: Checking (Z903) Ground Circuits
Courtesy of CHRYSLER LLC

Using a 12-volt test light connected to 12-volts, probe the (Z931) ground circuit.

Does the test light illuminate brightly?

Yes
1. Go To 8.
No
1. Repair the high resistance in the affected circuit.
2. Perform ABS VERIFICATION TEST .
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 .

Turn the ignition on.

With the scan tool, read ABS DTCs.

Does this DTC reset?

Yes
1. Replace the Hydraulic Control Unit in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST .
No
1. Perform ABS VERIFICATION TEST .