Es250 Cooling Fan Ecu
Turn ignition off. Disconnect cooling fan ECU. See Figure. Using a DVOM, measure resistance and voltage as indicated in the COOLING FAN ECU SPECIFICATIONS table. Make all measurements from harness side of connector. See Fig 1. Repair harness as necessary.
COOLING FAN ECU SPECIFICATIONS
| Terminals | Condition | Value | ||
|---|---|---|---|---|
| 2 & Ground | N/A | Continuity | ||
| 3 & Ground | Ignition On | Battery Voltage | ||
| 4 & Ground | Ignition On | Battery Voltage | ||
| 5 & 7 | (1) 176°F (80°C) | Approx. 1530 Ohms | ||
| 5 & 7 | (1) 194°F (90°C) | Approx. 1180 Ohms | ||
| 5 & 7 | (1) 203°F (95°C) | Approx. 1030 Ohms | ||
| 6 & Ground | N/A | Continuity | ||
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