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	CONNECT: Scan Tool. IGNITION: ON CHECK: throttle valve position closed: SPECIFIED VALUE: 3 - 25% DEPRESS: Accelerator pedal slowly to WOT while observing the percentage display. The percentage display must increase uniformly CHECK: throttle valve position at WOT: SPECIFIED VALUE: 84 - 97% IGNITION: OFF -- Was value obtained?	-- YES: Go to Step 3 -- NO: Go to Step 4
3	CONDITION: may be intermittent PERFORM: Visual Inspection of wiring and component CHECK: wiring for open, high resistance, short or electrical connector for damage, corrosion, loose or broken terminals REPAIR: faulty wiring or connector	GO TO: Step 7
4	REMOVE: Throttle Valve Control Module -J338 - far enough so that the harness connector terminals are accessible. DISCONNECT: Throttle Valve Control Module -J338- harness connector IGNITION: ON CHECK: Throttle Valve Control Module -J338- harness connector terminals 2 to 6 for voltage. CHECK: Throttle Valve Control Module -J338- harness connector terminals 2 to Ground for voltage. SPECIFIED VALUE: About 5.0 V IGNITION: OFF -- Was value obtained?	-- YES: Go to Step 5 -- NO: Go to Step 6
5	REMOVE: Engine Control Module - J623-. Refer to appropriate service information. CHECK: Throttle Valve Control Module -J338- harness connector terminal 1 to the Engine Control Module - J623- harness connector terminal T60 / 27 for resistance. CHECK: Throttle Valve Control Module -J338- harness connector terminal 4 to the Engine Control Module - J623- harness connector terminal T60 / 12 for resistance. CHECK: Throttle Valve Control Module -J338- harness connector terminal 3 to the Engine Control Module - J623- harness connector terminal T60 / 15 for resistance. CHECK: Throttle Valve Control Module -J338- harness connector terminal 5 to the Engine Control Module - J623- harness connector terminal T60 / 30 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω) -- Was value obtained?	-- YES: REPLACE: Throttle Valve Control Module -J338-. Refer to appropriate repair information. GO TO: Step 7 -- NO: CHECK: wiring for open, high resistance, short or electrical connector for damage, corrosion, loose or broken terminals REPAIR: faulty wiring or connector GO TO: Step 7
6	REMOVE: Engine Control Module - J623-. Refer to appropriate service information. CHECK: Throttle Valve Control Module -J338- harness connector terminal 2 to the Engine Control Module - J623- harness connector terminal T60 / 28 for resistance. CHECK: Throttle Valve Control Module -J338- harness connector terminal 6 to the Engine Control Module - J623- harness connector terminal T60 / 29 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 7 -- NO: CHECK: wiring for open, high resistance, short or electrical connector for damage, corrosion, loose or broken terminals REPAIR: faulty wiring or connector GO TO: Step 7
7	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