Test Procedure

Step	Procedure	Result / Action to Take
1	PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK . -- Was Complaint verified?	YES: GO TO Step 2. NO: GATHER more information from customer about the complaint.
2	IGNITION: OFF. DISCONNECT: Knock Sensor 1 -G61- harness connector. CHECK: Knock Sensor 1 -G61- terminals 1 to 2 for resistance. SPECIFIED VALUE: ∞ Ω or OL (Infinity). -- Was Value obtained?	YES: GO TO Step 3. NO: REPLACE: Knock Sensor 1 -G61-. Refer to appropriate repair information. GO TO: Step 4.
3	REMOVE: Engine Control Module - J623-. Refer to appropriate repair information. CHECK: Knock Sensor 1 -G61- harness connector terminal 1 to the Engine Control Module - J623- harness connector T60 / 39 for resistance. CHECK: Knock Sensor 1 -G61- electrical connector terminal 2 to the Engine Control Module - J623- electrical connector terminal T60 / 54 for resistance. CHECK: Knock Sensor 1 -G61- electrical connector terminal 3 to the Engine Control Module - J623- electrical connector terminal T60 / 52 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	YES: REPLACE Engine Control Module -J623-. Refer to appropriate repair information. GO TO: Step 4. NO: CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 4.
4	Final Procedure Perform a road test to verify repair. Do any DTC's return:	YES: Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY . Perform the diagnostic procedure for that DTC. NO: Repair is complete. Generate readiness code. Refer to READINESS CODE . Return vehicle to Customer.