Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Control Valve Control Module, Checking: Notes
Observe all safety precautions: SAFETY PRECAUTIONS
View clean working conditions: CLEAN WORKING CONDITIONS
Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.
For wiring diagrams, component locations, and connector views, Refer to the appropriate System Wiring Diagram.
Special tools and workshop equipment required
- Multimeter.
- Wiring diagram.
Test requirements
- The Engine Control Module - J623- fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched OFF.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched OFF.
- Ground (GND) connections between engine/transmission/chassis OK.
- Throttle valve must not be damaged or dirty.
- Coolant Temperature at least 80° C.
Function
Control Valve operation occurs via an electric motor Control Flap Adjustment Motor -V380-, Control Valve Position Sensor -G584-, and Control Valve Control Module -J808-.
The Control Valve Control Module -J808- cannot be serviced separately and must be serviced as a unit.
Test procedure
-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .
Start diagnosis
-- Remove the engine cover with air filter. Refer to appropriate Service Information.
-- Disconnect the connector from the control valve control module -J808 electrical harness connector -3-.
Checking resistance
-- Using a multimeter, check the Control Valve Position Sensor -G584- at the Control Valve Control Module -J808- terminals 2 to 3 for resistance.
Specified value: 2.0 to 5.0 Ω (at 20° C)
If the specified value was Not obtained:
-- Replace the Control Valve Control Module -J808-. Refer to appropriate Service Information.
-- Go to Final procedures.
If the specified value was obtained:
-- Check the voltage supply of the Control Valve Control Module -J808- to the Engine Control Module -J623-.
Checking voltage supply and wiring
-- Switch the ignition ON.
-- Using a Multimeter, check the Control Valve Control Module -J808- at the electrical harness connector terminals 1 to 3 for voltage.
Specified value: at least 4.5 V
-- Switch the ignition OFF.
Continue test according to the following table:
| Value | Cause | Test |
|---|---|---|
| If the specified value was not obtained: | Open or shorted circuit | CONTROL VALVE CONTROL MODULE, CHECKING => Checking wiring |
| If the specified value was obtained: | Check reference signal circuit | CONTROL VALVE CONTROL MODULE, CHECKING => Checking wiring |
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.