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3. RADIATOR FAN CONTROL RELAY CONTROL CIRCUIT Turn the ignition on, engine not running. With a scan tool, select Radiator Cooling Fan Relay #1 Control State, Using a 12–volt test light connected to battery voltage, probe the Radi- Does the test light illuminate and flash on and off? Yes >> Replace the Radiator Fan Control Relay. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) No >> Go To 4 4. (N201) RADIATOR FAN CONTROL RELAY CONTROL CIRCUIT OPEN Turn the ignition off. Remove the FCM from the PDM. Measure the resistance of the (N201) Radiator Fan Control Relay Con- Is the resistance below 5.0 ohms? Yes >> Go To 5 No >> Replace the PDM in accordance with the Service informa- tion. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 5. (N201) RADIATOR FAN CONTROL RELAY CONTROL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (N201) Radiator Fan Is the resistance below 100 ohms? Yes >> Replace the PDM in accordance with the Service informa- tion. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) No >> Replace Front Control Module in accordance with the Ser- vice Information. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 9 - 480 ENGINE ELECTRICAL DIAGNOSTICS LX |