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REPORT NUMBER - TOYCO98412 MAKE TOYOTA | MODEL COROLLA YEAR 02-1998 | ENGINE 4A-FE 4 cylinder
Customer Complaint
Engine overheating in traffic. Especially in city driving.
Problem Summary
After road testing found that both engine and A/C thermo fans not operating when engine hot or when A/C switched on.
Diagnostic Sequence
1) General inspection of vehicle thermo fan wiring and testing all in car and under bonnet fuses.
2) No power supply to fan fuse, 30 amp, in main under bonnet fuse box(1).
3) Power to this fan fuse comes from Main Engine Relay(2).
Fault Solution
1) Confirm power supply problem to fan fuse, 30 amp, in engine bay fuse box.
2) Remove and test power supply, via fuseable links, and switching voltage to main engine relay.
3) Test current draw across both fan motors. Should be approx 15 amps. Start up current can be as high as 25 amps.
4) Source new main engine relay from Toyota
Part no. 9098704002 Eng Relay Main(3)
5) Fit new relay and retest power supply to fan fuse when engine running. Recheck both fans operating when A/C on if applicable.
Recommended Time
Labour time was 2.5 hours, taking into account research time, location of parts and actual time spent fixing the problem
Useful Tips
Whenever replacing thermo fan relays, we recommend testing for current draw of thermo fans be done.
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