Engine Running Test

1) Verify that engine is at normal operating temperature. Run engine at 2000 RPM for 2 minutes. Turn key off and immediately restart engine while observing voltmeter.

2) Voltmeter should pulse 4 times. These are initialization pulses. After pulses occur, hold steel bar against manifold near knock sensor. Tap bar lightly with hammer for 15 seconds. Observe and record service codes.

NOTE: If more than 4 initialization pulses appear, check for open circuit between coil and MCU connector pin No. 8.

3) When codes are complete stop engine, remove test equipment and reconnect PCV valve. Perform tests for codes in the order that codes were displayed.