ENGINE AND EMISSION CONTROL SYSTEM
6E1-39
B-7 RADIATOR FAN CONTROL SYSTEM CHECK
1. Radiator fan motor
2. Radiator fan control (RFC) relay
3. ECM
4. Main relay
5. Engine coolant temp. (ECT) sensor
6. Vehicle speed sensor
7. A/C signal
STEP
ACTION
YES
NO
1
Check radiator fan control system referring to
p. 6E1-71.
Is it in good condition?
RFC system is in good
condition.
Go to Step 2.
2
Check RFC relay referring to p. 6E1-71.
Is it in good condition?
Go to Step 3.
Faulty RFC relay.
3
Check wire harnesses and connections for open
or short.
Are they in good condition?
Poor performance of ECT
sensor. If ECT sensor is OK,
substitute a known-good
ECM and recheck.
Wire open or short
Poor connection or
Faulty radiator fan
motor