Test Procedure

Step	Procedure	Result / Action to Take
1	PERFORM: Preliminary Check to verify the customers concern. Refer to PRELIMINARY CHECK . -- Was Complaint verified?	YES: GO TO Step 2. NO: GATHER more information from customer about the concern.
2	IGNITION: ON. DISCONNECT: Leak Detection Pump -V144- harness connector. CHECK: Leak Detection Pump -V144- harness connector terminal 4 to ground. SPECIFIED VALUE: Battery voltage. IGNITION: OFF. -- Was Value obtained?	YES: GO TO: Step 3. NO: CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. REPLACE: Any open fuses. GO TO: Step 4.
3	REMOVE: Engine Control Module - J623-. Refer to appropriate repair information. CHECK: Leak Detection Pump -V144- harness connector terminal 1 to the Engine Control Module - J623- harness connector T91 / 78 for resistance. CHECK: Leak Detection Pump -V144- harness connector terminal 2 to the Engine Control Module - J623- harness connector T91 / 23 for resistance. CHECK: Leak Detection Pump -V144- harness connector terminal 3 to the Engine Control Module - J623- harness connector T91 / 39 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	YES: REPLACE Leak Detection Pump -V144-. 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: FAULT DOES RETURN: REPLACE: Engine Control Module - J623-. Refer to appropriate repair information. FAULT DOES NOT RETURN: 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.