N1 Service DTC C1230 Check Rear Axle Speed Sensor

- Ignition OFF.

- Install Rotunda(r) breakout box 014-00322 or equivalent. Using the Breakout Box For Circuit Checks

- Measure resistance between Pins 22 and 21.

- Is reading between 800 and 1400 ohms?

YES -- Go to N7. N7 Check Coil Circuit Component Connector Resistance

NO -- Go to N2. N2 Check Resistance at Rear Axle Speed Sensor