Basic Inspection Of Radiator Fan System
- CHECK DTC
.
- Turn the ignition switch to ON.
- Using the Subaru Select Monitor, read all DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC displayed?
Yes: Perform the diagnosis for the displayed DTCs.
No: GO TO 2.
- RADIATOR FAN SYSTEM OPERATION CHECK
.NOTE: If the radiator fans are always running, go to "INSPECTION WHEN RADIATOR FANS DO NOT STOP". Ref. to COOLING (H4DO)>RADIATOR FAN SYSTEM>INSPECTION>INSPECTION WHEN RADIATOR FANS DO NOT STOP .
- Using the Subaru Select Monitor, select [Radiator Fan Relay] of [Active Test].
- 2.0 L model: Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.0)>ACTIVE TEST .
- 2.5 L model: Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>ACTIVE TEST .
NOTE: It is also possible to check the operation of the radiator fan system with the mode set to the delivery mode and the ignition switch turned to ON. Ref. 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) Ref. 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) Ref. 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) Ref. 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) Ref. to COOLING (H4DO)>RADIATOR FAN SYSTEM>INSPECTION>INSPECTION WHEN RADIATOR FANS DO NOT ROTATE>INSPECTION WHEN RADIATOR FANS DO NOT ROTATE (D) . - Using the Subaru Select Monitor, select [Radiator Fan Relay] of [Active Test].