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	DISCONNECT: Motronic Engine Control Module Power Supply Relay -J271- from the SB Fuse box in the engine compartment. CHECK: Motronic Engine Control Module Power Supply Relay -J271- socket terminal 30 to ground for voltage. CHECK: Motronic Engine Control Module Power Supply Relay -J271- socket terminal 86 to ground for voltage. 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, SB fusebox or connector. REPLACE: Any open fuses. GO TO: Step 6
3	REMOVE: Engine Control Module -J623-. Refer to appropriate service information. CONNECT: Jumper wire, Motronic Engine Control Module Power Supply Relay -J271- socket terminals 30 and 87. CHECK: Engine Control Module -J623- harness connector T94 / 3 and 5 to ground for voltage. SPECIFIED VALUE: Battery voltage. -- Were Values obtained?	-- YES: GO TO: Step 4 -- NO: GO TO: Step 5
4	REMOVE: Jumper wire, 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 Control Module -J623- harness connector T94 / 69 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: REPLACE: Motronic Engine Control Module Power Supply Relay -J271-. Refer to appropriate service information. 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. REPLACE: Any open fuses. GO TO: Step 6
5	REMOVE: Jumper wire, Motronic Engine Control Module Power Supply Relay -J271- socket terminals 30 and 87. REMOVE: Engine Control Module -J623-. Refer to appropriate service information. REMOVE: Fuse 2 (On Fuse Panel B) -SB2-. Refer to appropriate service information. CHECK: Downstream (output) side of Fuse 2 (On Fuse Panel B) -SB2- to Engine Control Module -J623- harness connector T94 / 3 and 5 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: REPLACE: Fuse Panel B -SB- fuse box. Refer to appropriate service information. 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. REPLACE: Any open fuses. GO TO: Step 6
6	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 service 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.