Vehicle Speed Signal Output (EBC125)

VEHICLE SPEED SIGNAL OUTPUT (EBC125)

Possible Causes
- INTERMITTENT VEHICLE SPEED SIGNAL
- VEHICLE SPEED SIGNAL DTC SET IN POWERTRAIN CONTROL MODULE
- ANTI-LOCK BRAKE MODULE DTCS PRESENT

Diagnostic Test
1. VEHICLE SPEED SIGNAL DTC SET IN PCM
1. Turn the ignition on.
2. With the scan tool, select view DTCs in the Powertrain Control Module.
Q: Is the status Active for P0500?
Yes: Refer to Computer and Control Systems and perform the appropriate diagnostic procedure.
No: Go To 2

2. ANTI-LOCK BRAKE MODULE DTCS PRESENT
1. With the scan tool, select view DTCs in the AntiLock Brake Module.
Q: Are there any DTCs present in the Anti-lock Brake Module?
Yes: Perform the appropriate diagnostic procedure. Perform ABS VERIFICATION TEST - VER 1. RWAL - Verification Test - VER 1 (EBC125)
No: Go To 3

3. INTERMITTENT VEHICLE SPEED SIGNAL
1. At this time, no DTCs are present.
2. Inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
3. Inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
4. Using the schematics as a guide, wiggle test the related circuit(s) while monitoring the scan tool data relative to the vehicle speed sensor circuit(s). Look for the data to change or for a DTC to set.
5. Refer to any technical service bulletins that may apply.
Q: Were any problems found?
Yes: Repair as necessary. Perform ABS VERIFICATION TEST - VER 1. RWAL - Verification Test - VER 1 (EBC125)
No: Test Complete.