Radiator Shutter System Check for Chevrolet Chevrolet C-Series Medium Duty Truck B7 2000
| • | Inspect the IGN 1 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 ENG 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)
in order for the radiator shutters to close. |
| • | 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. |
