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Cooling Fan ECU
- Disconnect negative battery cable. Turn ignition off and wait 20 seconds. Remove cover under instrument panel. Remove lower instrument panel cover and glove box door assembly. Disconnect cooling fan ECU.
- Reconnect negative battery cable. Using a DVOM, measure resistance and voltage as indicated in COOLING FAN ECU SPECIFICATIONS table. Make all measurements from harness side of connector. Repair harness as necessary.
COOLING FAN ECU SPECIFICATIONS
| Terminals |
Condition |
Value |
| 1 & Ground |
Ignition On |
Battery Voltage |
| 2 & 3 |
77°F (25°C) |
Approx. 7.8 Ohms |
| 4 & Ground |
N/A |
Continuity |
| 5 & Ground |
Throttle Valve Open |
No Continuity |
| 5 & Ground |
Throttle Valve Closed |
Continuity |
| 8 & Ground |
A/C Press. Sw. Disc. |
No Continuity |
| 8 & Ground |
A/C Press. Sw. Disc. |
No Continuity |
| 9 & 10 |
176°F (80°C) |
Approx. 1.52 Ohms |