P0693-COOLING FAN 2 CONTROL CIRCUIT LOW - 3.6L
For a complete wiring diagram, refer to the Wiring Information.
 |
Theory of Operation
The pulse-width modulated (PWM) fan receives a duty cycle signal from the Totally Integrated Power Module (TIPM) on the (K175) Rad Fan High Speed Control circuit. Based on the requested fan speed from the PCM, the TIPM outputs a 10 Hz duty cycle signal on the (K175) Rad Fan High Speed Control circuit to the Radiator Cooling Fan. The Radiator Cooling Fan receives the duty cycle signal from the TIPM and controls the fan accordingly. The High Speed Cooling Fan Relay is not used to control any components and has no external function.
-
When Monitored:
With the ignition on.
Battery voltage greater than 10 volts.
Cooling Fan off.
-
Set Condition:
The TIPM detects an open or short to ground in the (K175) Rad Fan High Speed Control circuit.
Possible Causes |
|---|
| (K175) RAD FAN HIGH SPEED CONTROL CIRCUIT OPEN |
| (K175) RAD FAN HIGH SPEED CONTROL CIRCUIT SHORTED TO GROUND |
| RADIATOR COOLING FAN MODULE |
| TOTALLY INTEGRATED POWER MODULE (TIPM) |
1. CHECK FOR AN INTERMITTENT CONDITION
| 1. | Turn the ignition on. |
| 2. | With the scan tool, clear all DTCs. |
| 3. | With the scan tool, read DTCs. |
Does the scan tool display DTC: P0693-COOLING FAN 2 CONTROL CIRCUIT LOW?
Yes
- Go To 2
No
- 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.
- Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
2. CHECK THE (K175) RAD FAN HIGH SPEED CONTROL CIRCUIT FOR AN OPEN IN THE HARNESS
 |
| 1. | Turn the ignition off. |
| 2. | Disconnect the TIPM C3 harness connector. |
| 3. | Disconnect the Radiator Cooling Fan Module harness connector. |
| 4. | Measure the resistance of the (K175) Rad Fan High Speed Control circuit between the TIPM C3 harness connector and Radiator Cooling Fan Module harness connector. |
Is the resistance below 5.0 Ohms?
Yes
- Go To 3
No
- Repair the open or excessive resistance in the (K175) Rad Fan High Speed Control circuit.
-
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).
3. CHECK THE (K175) RAD FAN HIGH SPEED CONTROL CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS
 |
| 1. | Turn the ignition off. |
| 2. | Measure the resistance between ground and the (K175) Rad Fan High Speed Control circuit at the Radiator Cooling Fan Module harness connector. |
Is the resistance above 10k Ohms?
Yes
- Go To 4
No
- Repair the short to ground in the (K175) Rad Fan High Speed Control circuit.
-
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).
4. CHECK THE TIPM FOR CORRECT OPERATION
 |
| NOTE: | Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary. |
| 1. | Reconnect the TIPM C3 harness connector. |
| 2. | Turn the ignition on. |
| 3. | Using a 12-volt test light connected to 12-volts, check the (K175) Rad Fan High Speed Control circuit. |
| 4. | With the scan tool, actuate the Radiator Fan 2 actuator using the On and Off commands. |
Does the test light dimly blink on and off while Radiator Fan 2 is commanded on?
Yes
- Replace the Cooling Fan Module in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
No
- Replace the Totally Integrated Power Module in accordance with the Service Information.
-
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).