Component Testing

TROUBLESHOOTING HINTS:
If there is damaged or disconnected wiring or a short-circuit in the vehicle speed sensor signal circuit, the engine may stall when the vehicle speed is reduced and the vehicle is stopped.

HARNESS INSPECTION:





STEP 1. Check for continuity in the vehicle speed sensor output circuit.
- Engine control module connector: Disconnected
- Move the vehicle.
Continuity: Continuity and no-continuity are repeated alternately.
OK: GO TO STEP 4
NG: GO TO STEP 2





STEP 2. Check for an open or short-circuit between the vehicle speed sensor and the engine control module.
- Engine control module connector: Disconnected
- Vehicle speed sensor connector: Disconnected
OK: GO TO STEP 3
NG: Repair the harness. (A1 - 80)





STEP 3. Check for continuity in the ground circuit.
- Vehicle speed sensor connector: Disconnected
OK: GO TO STEP 4
NG: Repair the harness. (B43 - Ground)





STEP 4. Measure the applied voltage.
- Vehicle speed sensor connector: Disconnected
- Engine control module connector: Connected
- Ignition switch: ON
Voltage (V): 4.5 - 4.9
OK: STOP
NG: Replace the engine control module.