Intake Flap Control Unit -GX14-, Checking

General Description

The Intake Flap Control Unit -GX14- is controlled by the Engine Control Module - J623- to increase the EGR rate by reducing the overpressure in the intake manifold. The Intake Manifold Runner Position Sensor -G336- provides the position of the Intake Flap Motor -V157-. to the Engine Control Module - J623-.

The Intake Flap Control Unit -GX14- contains the following components:

Intake Flap Motor -V157-.
Intake Manifold Runner Position Sensor -G336-.

The Intake Flap Control Unit -GX14- components cannot be serviced separately, and they must be serviced as a unit.

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 automatic transmission, ensure the selector lever position is in "P".
Vehicles with manual transmission, ensure the shifter lever position is in "N" with the parking brake applied.
Observe all safety precautions: SAFETY PRECAUTIONS .
View clean working conditions: CLEAN WORKING CONDITIONS .

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. REMOVE: Intake Flap Control Unit -GX14- far enough so that the harness connector terminals are accessible. DISCONNECT: Intake Flap Control Unit -GX14- harness connector. IGNITION: ON. CHECK: Intake Flap Control Unit -GX14- harness connector terminals 1 to 3 for voltage. IGNITION: OFF. SPECIFIED VALUE: About 5.0 V. -- Was Value obtained?	-- YES: GO TO: Step 3. -- NO: GO TO: Step 4.
3	REMOVE: Engine Control Module - J623-. Refer to appropriate Service Information. CHECK: Intake Flap Control Unit -GX14- harness connector terminal 2 to the Engine Control Module - J623- harness connector T105 / 100 for resistance. CHECK: Intake Flap Control Unit -GX14- harness connector terminal 4 to the Engine Control Module - J623- harness connector T105 / 4 for resistance. CHECK: Intake Flap Control Unit -GX14- harness connector terminal 5 to the Engine Control Module - J623- harness connector T105 / 25 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: REPLACE: Intake Flap Control Unit -GX14-. Refer to appropriate Service Information. GO TO: Step 5. -- 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 5.
4	REMOVE: Engine Control Module - J623-. Refer to appropriate Service Information. CHECK: Intake Flap Control Unit -GX14- harness connector terminal 1 to the Engine Control Module - J623- harness connector T105 / 60 for resistance. CHECK: Intake Flap Control Unit -GX14- harness connector terminal 3 to the Engine Control Module - J623- harness connector T105 / 59 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: GO TO: Step 5. -- 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 5.
5	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 Service 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.