P1669

Cooling Fan Link Malfunction

P1669 - Cooling fan ECM link.: Open circuit or No signal.

Possible causes:
1. Connector MS43 ECM C331, Cooling fan controller unit C1680.
2. Open circuit C331/4 (UW) - C1680/1 (UW).
3. Short circuit C331/4 (UW) - Ground.
4. Short circuit C1680/1 (UW) - Supply.
5. Cooling fan controller unit.
6. MS43 ECM.

1. Connector MS43 ECM C331, Cooling fan controller unit C1680.
CONNECTOR
Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

2. Open circuit C331/4 (UW) - C1680/1 (UW).
OPEN_CIRCUIT
Check resistance > 1M Ohms.

3. Short circuit C331/4 (UW) - Ground.
SHORT_CIRCUIT
Check resistance < 5.0 Ohms.

4. Short circuit C1680/1 (UW) - Supply.
PASS VALUES: 0 - 6 Volts

5. Cooling fan controller unit
No detail available for this fault

6. MS43 ECM.
No detail available for this fault