Checking System Integrity

Visually check all wiring, harnesses, connectors and components for evidence of damage, overheating, shorting or looseness. If a fault is found, repair as necessary. If no faults are found, go to next step.

1) Checking VSS Input Signal  With key off, install breakout box and leave ECA disconnected. Disconnect speedometer cable from transaxle. Measure continuity between VSS test pin and ground.

2)  Rotate speedometer cable. Continuity should exist 4 times per speedometer cable revolution. If continuity is correct, VSS circuit is okay. If continuity is not correct, go to next step.

3)  Disconnect VSS connector. With speedometer cable disconnected from transaxle, rotate speedometer cable. Measure continuity between speed sensor VSS terminal and ground terminal. Continuity should exist 4 times per speedometer cable revolution.

4)  If continuity is correct and speedometer is working, repair VSS or GND circuit between VSS sensor and ECA. If continuity is not correct, and speedometer is working, replace instrument cluster.

5)  If continuity is correct and speedometer is not working, check speedometer drive gear. If okay, repair VSS or GND circuit between VSS sensor and ECA. If continuity is not correct, and speedometer is not working, check speedometer cable. If okay, replace instrument cluster.