Code 9, Open Wheel Speed Sensor Circuit
- Turn ignition off. Disconnect speed sensor connector. Measure resistance across sensor terminals. See Figure. If resistance is greater than 2000 ohms, replace speed sensor.
- If resistance is 1000-2000 ohms, disconnect RWAL ECM connector. Reconnect speed sensor connector. Measure resistance between ECM terminals No. 9 and 10. If resistance is greater than 2000 ohms, repair open in speed sensor wiring. If resistance is 1000-2000 ohms, replace RWAL ECM.