Charge Air Temperature Sensor In Front Of Charge Air Cooler -G810-, Checking

General Description

The Engine Control Module -J623- uses the Charge Air Temperature Sensor In Front Of Charge Air Cooler -G810- signal to calculate a correction value for the charge air pressure. Evaluation of the signal gives consideration to the influence of temperature on the density of the charge air.

Special Tools And Workshop Equipment Required

Multimeter.
Wiring Diagram.
Scan Tool.

Test Requirements

Fuses OK.
Battery voltage OK.
Switch OFF all electrical and electronic accessories.
Vehicles with Auto. Transmission, ensure Selector Lever position is in "P".
Vehicles with Man. Transmission, ensure Shifter Lever position is in "N" with Parking Brake applied.
Observe all safety precautions, refer to SAFETY PRECAUTIONS .
View clean working conditions, refer to CLEAN WORKING CONDITIONS .
For Hybrid vehicle's refer to: HIGH VOLTAGE SYSTEM GENERAL WARNINGS .

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: Charge Air Temperature Sensor In Front Of Charge Air Cooler -G810- harness connector. CHECK: Charge Air Temperature Sensor In Front Of Charge Air Cooler -G810- harness connector terminals 1 to 2 for resistance. SPECIFIED VALUE: 1500 Ω (+/- 325 Ω @ approx. 20° C). -- Was Value obtained?	-- YES: GO TO Step 3 -- NO: REPLACE: Charge Air Temperature Sensor In Front Of Charge Air Cooler -G810-. Refer to appropriate repair information. GO TO: Step 4
3	REMOVE: Engine Control Module - J623-. Refer to appropriate repair information. CHECK: Charge Air Temperature Sensor In Front Of Charge Air Cooler -G810- harness connector terminal 1 to the Engine Control Module - J623- harness connector terminal T60 / 24 for resistance. CHECK: Charge Air Temperature Sensor In Front Of Charge Air Cooler -G810- harness connector terminal 2 to the Engine Control Module - J623- harness connector terminal T60 / 40 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: REPLACE: Charge Air Temperature Sensor In Front Of Charge Air Cooler -G810-. Refer to appropriate repair information. GO TO: Step 4 -- 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 4
4	Final Procedure Perform a road test to verify repair. -- Does the original DTC return?	-- YES: CHECK: Engine Control Module -J623- harness connector for any damaged, pushed-out pins. REPAIR: As necessary. If all electrical connections are OK: REPLACE: Engine Control Module -J623-. Refer to appropriate repair information. 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.