For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
The Powertrain Control Module (PCM) sends a CAN bus message to the Totally Integrated Power Module (TIPM) requesting high speed cooling fan operation. The TIPM grounds the coil for the High Speed Cooling Fan Relay through the high speed radiator fan control circuit. The High Speed Cooling Fan Relay then provides battery voltage to the high speed coil in the Cooling Fan Motor.
When Monitored:
With the ignition on.
Battery voltage greater than 10 volts.
With the High Speed Cooling Fan on.
Set Condition:
The TIPM detects a short to voltage in the Rad Fan High Speed Control circuit.
Possible Causes
(K175) RAD FAN HIGH SPEED CONTROL CIRCUIT SHORTED TO VOLTAGE
RADIATOR FAN HIGH RELAY
TOTALLY INTEGRATED POWER MODULE (TIPM)
1.
ACTIVE DTC
1.
Turn the ignition on.
2.
With the scan tool, clear all DTCs.
3.
With the scan tool, actuate Radiator Fan 2.
4.
With the scan tool, read DTCs.
Does the scan tool display DTC: P0694-COOLING FAN 2 CONTROL CIRCUIT HIGH?
Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
