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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: *VEHICLE SPEED SIGNAL OUTPUT >> 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. CONTROLLER ANTILOCK BRAKE DTC'S PRESENT
  2. INTERMITTENT VEHICLE SPEED SIGNAL
  3. VEHICLE SPEED SIGNAL CIRCUIT SHORTED OR OPEN
  4. CAB- NO SPEED SIGNAL OUTPUT
  5. PCM - CAN'T READ VEHICLE SPEED SIGNAL
TEST ACTION AND APPLICABILITY

TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII®, read DTC's.
Is the Good Trip Counter for P-0500 displayed and Equal to 0?
  1. Yes --> Go To 2
  2. No --> Go To 5
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2 Turn the ignition on.
With the DRBIII®, read DTCs.
Check for Controller Antilock Brake DTC's.
Are any CAB DTC's present?
  1. Yes --> Repair all Controller Antilock Brake DTC's before proceeding.

    Perform ABS VERIFICATION TEST - VER 1.

  2. No --> Go To 3
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3 Turn the ignition off.
Disconnect the Powertrain Control Module harness connectors.
Disconnect the CAB connector.
Ignition on, engine not running.
Check the Vehicle Speed Signal circuit for a short to B+, short to ground and for an open.
Is the Vehicle Speed Signal circuit OK?
  1. Yes --> Go To 4
  2. No --> Repair the open Vehicle Speed Signal circuit for a short or an open.

    Perform ABS VERIFICATION TEST - VER 1.

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4 Turn ignition off.
Disconnect the CAB connector.
Connect a jumper wire to the Vehicle Speed Signal circuit in the CAB harness connector.
Turn ignition on.
Quickly and repeatedly tap the jumper wire to ground.
With the DRBIII® read the Vehicle Speed Signal display.
Is the DRBIII® reading Vehicle Speed above 0 MPH?
  1. Yes --> 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.

  2. No --> Replace the Powertrain Control Module in accordance with the Service Information.

    Perform POWERTRAIN VERIFICATION TEST VER - 5.

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5 At this time, the conditions required to set the DTC are not present.
NOTE: Use the Freeze Frame Data to help duplicate the conditions that set the DTC. Pay particular attention to the DTC set conditions, such as, VSS, MAP, ECT, and Load.
NOTE: Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
NOTE: Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
NOTE: 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
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