Test Procedure

Step	Procedure	Result / Action to Take
1	PERFORM: Preliminary Check to verify the customers complaint. Refer to: 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: Motronic Engine Control Module Power Supply Relay -J271- from the Fuse Panel B -SB- in the engine compartment (refer to appropriate wiring diagram). IGNITION: ON. CHECK: Motronic Engine Control Module Power Supply Relay -J271- socket terminals 30 and 86 to ground for voltage. IGNITION: OFF. SPECIFIED VALUE: Battery voltage. -- Were Values obtained?	-- YES: GO TO: Step 3. -- NO: PERFORM: Visual Inspection of wiring and component. 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 6.
3	REMOVE: Engine/Motor Control Module -J623-. CONNECT: Jumper wire, between the Motronic Engine Control Module Power Supply Relay -J271- socket terminals 30 and 87. IGNITION: ON. CHECK: Engine/Motor Control Module -J623- harness connector T91 / 3, T91 / 5 and T91 / 6 to ground for voltage. IGNITION: OFF. SPECIFIED VALUE: Battery voltage. -- Were Values obtained?	-- YES: GO TO: Step 4. -- NO: GO TO: Step 5.
4	DISCONNECT: Jumper wire, between the Motronic Engine Control Module Power Supply Relay -J271- socket terminals 30 and 87. CHECK: Motronic Engine Control Module Power Supply Relay -J271- socket terminal 85 to the Engine/Motor Control Module -J623- harness connector T91 / 89 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: REPLACE: Motronic Engine Control Module Power Supply Relay -J271-. GO TO: Step 6. -- NO: PERFORM: Visual Inspection of wiring and component. 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 6.
5	DISCONNECT: Jumper wire, between the Motronic Engine Control Module Power Supply Relay -J271- socket terminals 30 and 87. REMOVE: Appropriate fuse (refer to appropriate wiring diagram for correct fuse). CHECK: Downstream (output) side of appropriate fuse to the Engine/Motor Control Module -J623- harness connector T91 / 3, T91 / 5 and T91 / 6 for resistance (refer to appropriate wiring diagram for correct fuse). SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: REPLACE: Fuse panel. GO TO: Step 6. -- NO: PERFORM: Visual Inspection of wiring and component. 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 6.
6	Final Procedure Perform a road test to verify repair. -- Does the original DTC return?	-- YES: CHECK: Engine/Motor Control Module -J623- harness connector for any damaged, pushed out pins. REPAIR: As necessary. If all electrical connections are OK: REPLACE: Engine/Motor Control Module -J623-. Clear the DTC's. Refer to: DIAGNOSTIC MODE 04 - ERASE DTC MEMORY . Repair is complete. Generate Readiness Code. Refer to: READINESS CODE . Return vehicle to Customer. -- NO: Perform the diagnostic procedure for any DTC's. If no DTC's return, the repair is complete. Return vehicle to customer.