Inspection Chart For Diagnostic Trouble Codes (Fault Tree)

INSPECTION CHART FOR DIAGNOSTIC TROUBLE CODES (FAULT TREE)

NOTE
1. Do not replace the engine control module (ECM) until a thorough terminal check reveals there are no short/open circuits.
2. After the ECM detects a malfunction, a diagnostic trouble code is recorded the next time the engine started and the same malfunction is re-detected. However, for items marked with a "*", the diagnostic trouble code is recorded on the first detection of the malfunction.
3. O2 : Heated oxygen sensor
4. Sensor 1 : indicates sensors which are mounted closest to the engine.
5. Sensor 2 : indicates sensors which are mounted next-closest to the engine.