P0501-VEHICLE SPEED SENSOR 1 PERFORMANCE
For a complete wiring diagram Refer to Section 8W
- When Monitored:
Continuously while the system is active.
- Set Condition:
There is an error in the vehicle speed message received over the CAN Bus from the Anti-lock Brake Module.
| Possible Causes |
| INTERMITTENT DTC |
| CAN BUS OPEN OR SHORTED CONDITION |
| ANTI-LOCK BRAKE MODULE |
| ENGINE CONTROL MODULE (ECM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
Diagnostic Test
1. ACTIVE DTCNOTE: Diagnose all CAN B and C communication DTCs before continuing.
Test drive the vehicle
With a scan tool, view DTCs.
Is the status Active for this DTC?
Yes
- Go To 2
No
- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
- Perform the ECM Verification Test Ver. 1.
2. DTCS PRESENT IN THE ANTI-LOCK BRAKE MODULE
With a scan tool check for DTCs in the Anti-lock Brake Module.
Are there any DTCs active in the Anti-lock Brake Module at this time?
Yes
- Repair Anti-Lock Brake Module DTC's.
No
- Replace and program the Engine Control Module (ECM) in accordance with the Service Information.
- Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)