For a complete wiring diagram Refer to Section 8W.When Monitored:With the ignition on. Battery voltage greater than 10 volts.Set Condition:The PCM is requesting the TIPM to turn on the Cooling Fan On and it is not operating. The TIPM detects an open or short to ground in the Relay Coil Control circuit. One Trip Fault. Three good trips to turn off the MIL.Possible Causes(K175) HIGH SPEED COOLING FAN RELAY CONTROL CIRCUIT SHORTED TO GROUND(K175) HIGH SPEED COOLING FAN RELAY CONTROL CIRCUIT OPENHIGH SPEED COOLING FAN RELAYTOTALLY INTEGRATED POWER MODULEAlways perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).1. COOLING FAN RELAY OPERATIONIgnition on, engine not running.With a scan tool, actuate the High Speed Cooling Fan Relay RAD FAN 2.Is the Cooling Fan operating?YesRefer to the INTERMITTENT CONDITION Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).NoGo To 22. HIGH SPEED COOLING FAN RELAYTurn the ignition off.Verify the High Speed Cooling Fan Relay is installed properly and that the terminals are making a tight fit.Remove the High Speed Cooling Fan Relay and substitute it with a known good Relay.Ignition on, engine not running.With a scan tool, actuate the High Speed Cooling Fan Relay.Is the Cooling Fan operating?YesReplace the High Speed Cooling Fan Relay.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE).NoGo To 3 3. (K175) HIGH SPEED COOLING FAN RELAY CONTROL CIRCUIT SHORT TO GROUND

Turn the ignition off.Disconnect the C3 TIPM harness connector.Remove the High Speed Cooling Fan Relay.Measure the resistance between ground and the (K175) High Speed Cooling Fan Relay Control circuit at the relay connection.Is the resistance below 100 ohms?YesRepair the short to ground in the (K175) High Speed Cooling Fan Relay Control circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE).NoGo To 44. (K175) HIGH SPEED COOLING FAN RELAY CONTROL CIRCUIT OPEN

Measure the resistance of the (K175) High Speed Cooling Fan Relay Control circuit from the C3 TIPM harness connector to the Relay connection.Is the resistance above 5.0 ohms?YesRepair the open or excessive resistance in the (K175) High Speed Cooling Fan Relay Control circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE).NoGo To 5 5. TOTALLY INTEGRATED POWER MODULEBefore continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.Were any problems found?YesRepair as necessary.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE).NoReplace the Totally Integrated Power Module per Service Information.Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).