Test Procedure
- Turn ignition off. Connect Hi-Scan Pro tool or equivalent to OBD-II Data Link Connector (DLC). See Figure. Turn ignition on. Monitor and verify DTC P0501 is set, go to next step.
- Test drive vehicle and check if speedometer is operating properly. If speedometer is operating properly, go to next step. If speedometer is not operating properly, repair speedometer cable and/or cable drive gear. After repairs go to step 8.
- Turn ignition on. Observe instrument cluster indicators for proper operation. If cluster indicators are operating properly, go to next step. If any cluster indicator is faulty, repair or replace as necessary. See INSTRUMENT PANEL under ACCESSORIES/SAFETY EQUIPMENT in ACCESSORIES & ELECTRICAL article. After repair go to step 8.
- Turn ignition off. Disconnect instrument cluster "M71-3" 14-pin harness connector. See Fig 1. Measure resistance between ground and instrument cluster connector M71-3 terminal No. 8 (White/Black wire) and No. 6 (Blue/Black wire). Resistance should be more than 50 ohms. If resistance is as specified, go to next step. If resistance is not as specified, repair short circuit (in White/Black wire) or (in Blue/Black wire) between VSS and ECM. After repair go to step 8.
- Leave instrument cluster "M71-3" harness connector disconnected. Disconnect ECM 81-pin harness connector. See Figure. Measure resistance between ECM harness connector terminal No. 59. and both instrument cluster connector M71-3 terminal No. 6 (Blue/Black wire) and No. 8 (White/Black wire). Also measure resistance between ground and instrument cluster connector M71-3 terminal No. 2 (Black wire). All resistances should be one ohm or less. If resistances are as specified, go to next step. If any resistance is not as specified, repair open or short circuit (in Blue/Black wire, White/Black wireor Black wire)as necessary. After repair go to step 8.
- With instrument cluster "M71-3" harness connector disconnected and while rotating speedometer shaft. Measure resistance between connector M71-3 terminal No. 2 and both connector M71-3 terminals No. 6 and No. 8 (component side). Resistance should switch from short to open circuit 4 times per speedometer shaftrevolution. If resistance is as specified, go to next step. If resistance is not as specified, replace VSS with known-good component. After repair go to step 8.
- Verify than VSS and ECM connectors are secure. If connectors are okay, replace VSS with known-good component. If after sensor replacement problem persists, replace ECM and go to next step.
- Return vehicle to original condition. Clear codes using Hi-Scan Pro tool or equivalent. Verify repairs by driving vehicle and monitoring for pending codes. If DTC is set during test drive, follow appropriate DTC test procedure.
Courtesy of HYUNDAI MOTOR CO.