Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Caliber. 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.
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Cycle the ignition switch from off to on.
4. Road test the vehicle over 25 mph (40 km/h).
  NOTE: Vehicle must be driven above 25 mph (40 km/h) for set conditions to be meet.
5. With the scan tool, read the DTCs.
  NOTE: The Anti-Lock Brake Module must sense ALL 4 wheels at 7.5 mph (12 km/h) before it will extinguish the ABS indicators.
  
  Does the scan tool display: C1073-ABS PUMP MOTOR CONTROL CIRCUIT?
  
  Yes
  - Go to step 2
  No
  - The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched or partially broken wires.
  - Perform the ABS-INTERMITTENT CONDITION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
INSPECT RELATED WIRING HARNESS, TERMINALS, AND CONNECTORS
1. Turn the ignition off.
2. Visually inspect the related wiring harness. Look for any pinched, chafed, pierced and partially broken wires.
3. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out and corroded terminals.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Go to step 3
CHECK THE ABS PUMP MOTOR FUSED B+ FOR AN OPEN
1. Turn the ignition off.
2. Remove and visually inspect the ABS Pump Motor B+ fuse.
  Is the ABS Pump Motor B+ fuse open?
  
  Yes
  - Go to step 4
  No
  - Go to step 6
CHECK THE (A921) FUSED B(+) FOR A SHORT TO GROUND

Fig 1: CHECKING FUSED B(+) FOR SHORT TO GROUND
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Anti-Lock Brake Module harness connector.
3. Using a 12-volt test light connected to 12 volts, probe the (A921) Fused B+ circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Repair the (A921) Fused B(+) circuit for a short to ground.
  - Perform the ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Go to step 5
CHECK THE (A921) FUSED B(+) CIRCUIT
1. Turn the ignition off.
2. Visually inspect the (A921) Fused B(+) circuit in the wiring harness.
3. Look for any signs of intermittent short to ground.
  Is the wiring harness OK?
  
  Yes
  - Go to step 6
  No
  - Repair the (A921) Fused B(+) circuit for a short to ground.
  - Perform the ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
CHECK THE VOLTAGE ON THE (A921) FUSED B(+) CIRCUIT

Fig 2: CHECKING FUSED B(+) CIRCUIT VOLTAGE
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Anti-Lock Brake Module harness connector.
3. Measure the voltage of the (A921) Fused B(+) circuit in the Anti-Lock Brake Module harness connector.
  Is the voltage above 10 volts?
  
  Yes
  - Go to step 7
  No
  - Repair the (A921) Fused B(+) circuit for an open.
  - Perform the ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
CHECK THE (Z901) GROUND CIRCUITS FOR AN OPEN

Fig 3: CHECKING GROUND CIRCUITS FOR OPEN
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (Z901) Ground circuits between the Anti-Lock Brake Module harness connector and ground
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the ICU per service information.
  - Perform the ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Repair the high resistance in the affected circuit.
  - Perform the ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .