Component Tests and General Diagnostics

Radiator Shutter System Check

* Inspect the AXLE circuit breaker.
If the circuit breaker is not open, proceed with the diagnostic procedures.
Complete the following steps if the circuit breaker is open:

1. Locate the cause of the overload.
2. Repair the cause of the overload.
3. Replace the circuit breaker.

* Inspect the radiator shutters for binding.
* Verify that the engine coolant temperature is below 90.6°C (195°F).
The engine coolant temperature must be below 90.6°C (195°F) for correct operation.
* Inspect for a broken or partially broken wire inside the insulation.
A broken wire inside the insulation may cause system malfunction.
A broken wire inside the insulation may prove GOOD in a continuity/voltage check with a system disconnected.
These circuits may be intermittent or resistive when loaded. Inspect the circuits by monitoring them for a voltage drop with the system operational (under load).
* Inspect for proper installation of aftermarket electronic equipment. Incorrectly installed aftermarket electronic equipment may affect the integrity of other systems.