Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Engine Cooling Schematics Connector End View Reference: Cooling System Connector End Views DEFINITION: The auxiliary cooling fan is always ON. | |||
1 | Did you perform the Engine Cooling Diagnostic System Check? | Go to Step 2 | |
2 | Is the auxiliary cooling fan always ON? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 | Disconnect the pusher cooling fan relay located in the left rear fuse block. Does the auxiliary cooling fan turn OFF? | Go to Step 5 | Go to Step 4 |
4 | Repair the short to voltage in the auxiliary cooling fan motor supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 11 | -- |
5 | Probe the control circuit of the auxiliary fan relay with a test lamp connected to battery positive voltage. Does the test lamp illuminate? | Go to Step 8 | Go to Step 6 |
6 | Inspect for poor connections at the pusher cooling fan relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 |
7 | Inspect the auxiliary cooling fan relay control circuit for a short to ground. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
8 | Inspect for poor connections at the harness connector of the Engine Control Module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
9 | Replace the pusher cooling fan relay. Did you complete the replacement? | Go to Step 11 | -- |
10 |
Important:: Perform the programming procedure for the ECM. Replace the ECM. Refer to Engine Control Module Replacement in Engine Controls. Did you complete the repair? | Go to Step 11 | -- |
11 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
