Diesel Data: Automotive Repair

Component Inspection


Fig. 1 Checking Cooling Fan Motor Relay:






COOLING FAN MOTOR RELAY
1. Using an ohmmeter, check for continuity between relay terminals 1 and 2, Fig. 1, then see that continuity is present between terminals 3 and 4. If continuity is not present in either case, replace relay.
2. Apply battery voltage across terminals 1 and 2, then check that no continuity exists between terminals 3 and 4. If continuity is found, replace relay.

Fig. 3 Checking Fan Motor:






FAN MOTOR
1. Connect an ammeter and battery to fan motor connector, Fig. 3.
a. On 1989 models, see that fan rotates smoothly and that current is 3.2-4.4 amps for 3S-FE and 3S-GE engines with manual transaxle, 5.8-7.4 amps for 3S-FE and 3S-GE engines with automatic transaxles and 8.6-11.6 amps for 3S-GTE engines.
b. On 1990 models, ensure that fan rotates smoothly and that current is 5.4-7.4 amps for all engines.
c. On 1991 and '92 models, check that fan rotates smoothly and that current measures 5.8-7.4 amps for 4A-FE and 5S-FE engines and 8.8-10.8 amps for 3S-GTE engine.


Fig. 5 Checking Water Temperature Switch.:




Fig. 6 Checking Water Temperature Switch.:






WATER TEMPERATURE SWITCH
1. Using an ohmmeter, check for continuity at temperature switch located on water inlet housing as shown in Figs. 5 and 6.
2. Ensure that no continuity exists when water temperature is above 199°F.
3. Check that continuity exists when water temperature is below 181°F.
4. If switch does not perform as specified, replace switch.