1. Radiator fan motor 1
2. Radiator fan relay 1 (High / Low)
3. Radiator fan relay 2 (High)
4. Radiator fan relay 3 (Low)
5. Radiator fan motor 2
6. ECM
7. “REAR DEFG” fuse (25 A)
8. From battery
9. Double relay
ENGINE DIAGNOSIS (RHZ ENGINE WITH TRIPLE-CONNECTOR ECM) 6-1-35
DTC P1108 RADIATOR FAN HIGH SPEED CIRCUIT MALFUNCTION
WIRING DIAGRAM
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3) Start engine and warm up completely.
4) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 Check Wire Harness
1) Disconnect connector at ECM.
2) Check voltage between E227-18 and ground with
ignition switch ON.
Is it about 12 V?
Poor C51-25
connection.
Go to Step 3.
3 Check Radiator Fan Relay
1) Check radiator fan relay 1 and 2 referring to
Section 6E3.
Are they in good condition?
D “YEL/WHT” wire
open or short to
ground,
D “YEL/GRN” wire
open or short to
ground,
D Fuse broken
Faulty radiator fan
relay 1 or 2.
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