Malfunction In Vehicle Speed Sensor Circuit (Non-Turbo)
- Check service data for vehicle speed sensor. See SERVICE DATA INSPECTION under TESTING & DIAGNOSIS. If vehicle speed sensor service data test as specified, go to next step. If vehicle speed sensor service data do not test as specified, go to step 4).
- Select TOUR mode using ECS switch. While monitoring service data indication for item No. 61, vary simulated vehicle speed using Multi-Use Tester (MUT). See SERVICE DATA INSPECTION . See HIGH SPEED SENSITIVITY CONTROL TEST SPECIFICATIONS table. Repeat this step for items No. 62, 63 and 64.
- If high speed sensitivity control tests as specified, ECS system is okay. If high speed sensitivity control does not test as specified, replace ECS control unit.
- Remove knee protector, steering column covers and meter bezel. Remove instrument cluster, and disconnect combination meter harness connector. Check for continuity between combination meter harness connector terminal No. 64 (Black wire) and ground. See Fig 1. Repair wiring harness if continuity is not present.
- Check for continuity between combination meter harness connector terminal No. 109 (Yellow/White wire) and ECS control unit harness connector terminal No. 53 (Yellow/White wire). See Figure and Fig 1. If continuity is present, go to next step. If continuity is not present, repair harness.
- Test vehicle speed sensor. See VEHICLE SPEED SENSOR under COMPONENT TESTING. If vehicle speed sensor is okay, replace ECS control unit. If vehicle speed sensor is faulty, replace combination meter.
HIGH SPEED SENSITIVITY CONTROL TEST SPECIFICATIONS
| Simulated Vehicle Speed Change | MUT Service Data Indication Change |
|---|---|
| Accelerate From 80 MPH To 81 MPH | From SOFT To MEDIUM |
| Decelerate From 75 MPH To 74 MPH | From MEDIUM To SOFT |