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.
Checking Wiring
If the manufacturers test box is being used, perform the following step.
-- Install the test box.
If the manufacturers test box is not being used, perform the following step.
-- Remove the Motronic Engine Control Module (ECM) - J623 -. Refer to appropriate service information.
-- Using a Multimeter, check the Radiator Identification Sensor -G611- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 for resistance.
| Radiator Identification Sensor - G611- electrical harness connector. | Motronic Engine Control Module (ECM) electrical harness connector T94 terminals or test box sockets |
|---|---|
| 1 | 52 |
Specified value: 1.5 Ω Max.
If the specified value was Not obtained:
-- Check the wiring connection for an open circuit, short circuit to Battery positive or Ground
-- Check the wiring connection for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
-- Go to Final procedures
If the specified value was obtained:
-- With the Motronic Engine Control Module (ECM) Connectors still unplugged - J623 -. Refer to appropriate service information.
-- Use a Multimeter, Check the Radiator Identification Sensor -G611- electrical harness connector terminal 1 to engine ground for continuity
If Specified value is 1.5 Ω or less
-- Check the wiring connection for a short circuit to Engine Ground
-- If necessary, repair the faulty wiring or connection, If no faults were found Replace the Motronic Engine Control Module (ECM) - J623 -. Refer to appropriate service information.
-- Go to Final procedures
If the manufacturers test box is being used, perform the following step.
-- Install the test box.
If the manufacturers test box is not being used, perform the following step.
-- Remove the Motronic Engine Control Module (ECM) - J623 -. Refer to appropriate service information.
-- Using a Multimeter, check the Radiator Identification Sensor -G611- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 for resistance.
| Radiator Identification Sensor -G611- electrical harness connector terminals | Motronic Engine Control Module (ECM) -J623- electrical connector T94 terminals or test box sockets |
|---|---|
| 2 | 64 |
Specified value: 1.5 Ω Max.
If the specified value was Not obtained:
-- Check the wiring connection for an open circuit, short circuit to Battery positive or Ground
-- Check the wiring connection for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
-- Go to Final procedures
If the specified value was obtained:
-- Replace the Radiator Identification Sensor - G611- (with radiator assembly). Refer to the appropriate service information.
Final procedures
-- Reinstall the engine cover with air filter, if necessary. Refer to the appropriate service information.
-- After the repair work, the following work steps must be performed in the following sequence:
- Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
- If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
- If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .
NO RELATED
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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.