Basic Inspection Of Radiator Fan System
- CHECK DTC.
Read the DTC using Subaru Select Monitor. Refer to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .
Is DTC detected?
Yes:
- Repair the corresponding system.
- Go to 2.
No: Go to 2.
- RADIATOR FAN SYSTEM OPERATION CHECK. NOTE: If the radiator fans are always running, refer to COOLING (H4DO)>RADIATOR FAN SYSTEM>INSPECTION>INSPECTION WHEN RADIATOR FANS DO NOT STOP .
- Using the Subaru Select Monitor, perform the active test for the radiator fan relay. (When using the Subaru Select Monitor) Refer to ENGINE (DIAGNOSTICS) (H4DO)>ACTIVE TEST .
- Install the delivery mode fuse, and turn to IG ON. (When not using the Subaru Select Monitor) Refer to PRE-DELIVERY INSPECTION>PRE-DELIVERY INSPECTION (PDI) PROCEDURE>DELIVERY MODE .
- Check the radiator fan operation.
Do the radiator main fan and sub fan rotate in the order of "OFF → Low speed revolution → High speed revolution"?
Yes: System is normal.
Restore the vehicle to its original state.
No: Inspect corresponding malfunction using "Table for Diagnostics Procedure with Phenomenon".
Table for Diagnostics Procedure with Phenomenon
NOTE:
If phenomenon does not match with any of the phenomenon described below, inspect fuse, relay and ground contacts for failure.
| Sub fan | Main fan | Sub fan | Main fan | Sub fan | Main fan | Sub fan | Main fan | |
|---|---|---|---|---|---|---|---|---|
| Stop control | Stop | Stop | Stop | Stop | Stop | Stop | Stop | Stop |
| Low speed control | Stop | Stop | At high speed | Stop | At low speed | At low speed | At low speed | At low speed |
| High speed control | Stop or high speed | Stop or high speed | At high speed | Stop or high speed | At high speed | Stop | Stop | At high speed |
| Reference | Inspection when radiator fans do not rotate (A) Refer to COOLING (H4DO)>RADIATOR FAN SYSTEM>INSPECTION>INSPECTION WHEN RADIATOR FANS DO NOT ROTATE>INSPECTION WHEN RADIATOR FANS DO NOT ROTATE (A) . | Inspection when radiator fans do not rotate (B) Refer to COOLING (H4DO)>RADIATOR FAN SYSTEM>INSPECTION>INSPECTION WHEN RADIATOR FANS DO NOT ROTATE>INSPECTION>WHEN RADIATOR FANS DO NOT ROTATE (B) . | Inspection when radiator fans do not rotate (C) Refer to COOLING (H4DO)>RADIATOR FAN SYSTEM>INSPECTION>INSPECTION WHEN RADIATOR FANS DO NOT ROTATE>INSPECTION WHEN RADIATOR FANS DO NOT ROTATE (C) . | Inspection when radiator fans do not rotate (D) Refer to COOLING (H4DO)>RADIATOR FAN SYSTEM>INSPECTION>INSPECTION WHEN RADIATOR FANS DO NOT ROTATE>INSPECTION WHEN RADIATOR FANS DO NOT ROTATE (D) . | ||||