LEMON Manuals: Even more car manuals for everyone
Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 106 (Chassis Diagnostic Procedures - Anti-Lock Brake System) >> Diagnostic Information And Procedures >> Brakes (Cab) - Symptoms >> Symptom List: PUMP MOTOR CIRCUIT OPEN - 67; PUMP MOTOR STALLED - 68 >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. ABS PUMP MOTOR INTERMITTENT DTC
  2. FUSED B(+) CIRCUIT INTERMITTENTLY SHORTED TO GROUND
  3. FUSED B(+) CIRCUIT SHORTED TO GROUND
  4. CAB - FUSED B(+) CIRCUIT SHORTED TO GROUND
  5. FUSE OPEN - PUMP MOTOR CIRCUIT
  6. NO B+ SUPPLY TO FUSE
  7. ABS PUMP MOTOR INOPERATIVE
  8. FUSED B(+) CIRCUIT OPEN
  9. GROUND CIRCUIT OPEN
  10. GROUND CIRCUIT HIGH RESISTANCE
  11. CAB - INTERNAL FAULT
TEST ACTION AND APPLICABILITY

TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII®, read DTC's.
With the DRBIII®, erase DTC's.
Turn the ignition off.
Turn the ignition on.
Turn the ignition off.
With the DRBIII®, actuate the ABS pump motor.
Did the Pump Motor operate when actuated?
  1. No --> Go To 2
  2. Yes --> Go To 11
 All
2 Turn the ignition off.
Remove and inspect the ABS Pump Motor fuse.
Is the Fuse open?
  1. Yes --> Go To 3
  2. No --> Go To 6
 All
3 Turn the ignition off.
Make sure the Pump Motor connector is secure.
Visually inspect the Fused B(+) circuit in the wiring harness from the ABS PUMP fuse to the CAB harness connector. Look for any sign of an intermittent short to ground.
Is the wiring harness OK?
  1. Yes --> Go To 4
  2. No --> Repair the Fused B(+) circuit short to ground.

    Perform ABS VERIFICATION TEST - VER 1.

 All
4 Turn the ignition off.
Remove the ABS PUMP Fuse.
Disconnect the CAB harness connector.
Make sure the ABS Pump Motor connector is secure.
NOTE: Check connector - Clean/repair as necessary.

Measure the resistance of the Fused B(+) circuit to ground.
Is the resistance above 5.0 ohms?
  1. Yes --> Go To 5
  2. No --> Repair the Fused B(+) circuit short to ground.

    Perform ABS VERIFICATION TEST - VER 1.

 All
5 Turn the ignition off.
Make sure the Pump Motor connector is secure.
Remove the ABS PUMP Fuse.
NOTE: The CAB must be connected for the results of this test to be valid.

Measure the resistance between Fused (B)+ circuit and ground.
Is the resistance open?
  1. Yes --> Replace the ABS Pump Motor Fuse. If the fuse is open make sure to check for a short to ground.

    Perform ABS VERIFICATION TEST - VER 1.

  2. No --> Replace the Controller Antilock Brake in accordance with the Service Information. Refer to the SYMPTOM: *REPLACING THE CONTROLLER ANTILOCK BRAKE  for additional information.

    Perform ABS VERIFICATION TEST - VER 1.

 All
6 Turn the ignition off.
Remove the ABS PUMP Fuse.
Disconnect the CAB harness connector.
NOTE: Check connector - Clean/repair as necessary.

Measure the resistance of the Fused B (+) circuit between the ABS PUMP Fuse Terminal and the CAB harness connector.
Is the resistance below 5 ohms?
  1. Yes --> Go To 7
  2. No --> Repair the Fused B(+) circuit for an open.

    Perform ABS VERIFICATION TEST - VER 1.

 All
7 Turn the ignition on.
Measure the voltage of the B(+) supply at the ABS PUMP Fuse terminal.
Is the voltage above 11 volts?
  1. Yes --> Go To 8
  2. No --> Repair the B+ supply for an open.

    Perform ABS VERIFICATION TEST - VER 1.

 All
8 Turn the ignition off.
Disconnect the ABS Pump Motor connector.
Connect a 10 gauge jumper wire between ABS Pump Motor Fused B (+) circuit and a 40 Amp Fused B (+) circuit.
Connect a 10 gauge jumper wire between ABS Pump Motor ground circuit and ground.
Monitor ABS Pump Motor operation.
Is the ABS Pump Motor operating?
  1. Yes --> Go To 9
  2. No --> Replace the ABS Pump Motor/Hydraulic Control Unit assembly.

    Perform ABS VERIFICATION TEST - VER 1.

 All
9 Turn the ignition off.
Disconnect the CAB harness connector.
NOTE: Check connector - Clean/repair as necessary.

Measure the resistance of the CAB Ground circuits.
Is the resistance below 5.0 ohms?
  1. Yes --> Go To 10
  2. No --> Repair the ground circuit for an open.

    Perform ABS VERIFICATION TEST - VER 1.

 All
10 Make sure the ABS Pump Motor connector is secure.
Turn the ignition on.
With the DRBIII®, enable ABS Pump Motor actuation.
NOTE: ABS Pump Motor will not operate, but voltage will be applied.

Measure the voltage drop across the ABS Ground circuit connection, with ABS Pump Motor actuation enabled.
Is the voltage below 0.1 volt?
  1. Yes --> Replace the Controller Antilock Brake in accordance with the Service Information.

    Perform ABS VERIFICATION TEST - VER 1.

  2. No --> Repair the Ground circuit for an open.

    Perform ABS VERIFICATION TEST - VER 1.

 All
11 Turn the ignition off.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Make sure the Pump Motor connecter is secure.
Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Refer to any Hotline letters or Technical Service Bulletins that may apply.
Were any problems found?
  1. Yes --> Repair as necessary.

    Perform ABS VERIFICATION TEST - VER 1.

  2. No --> Test Complete.
 All
scientia non olet · About LEMON Manuals