Circuit/System Verification
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, verify that DTC P0480, P0691, or P0692, is not set.
- If a DTC is set, refer to DTC P0480, P0691, or P0692 (LF4) DTC P0480, P0691, or P0692 (LCV or LTG without V03) DTC P0480, P0691, or P0692 (LGX without Y4Q) DTC P0480, P0691, or P0692 (LGX with Y4Q) DTC P0480, P0691, or P0692 (LTG with V03) for further diagnosis.
- Command the cooling fan ON from 0-90 % with a scan tool. Verify that the cooling fan turns ON and operates as commanded.
- If the cooling fan does not respond to the commanded states, refer to Cooling Fan Inoperative (LCV, LGX or LTG) Cooling Fan Inoperative (LTG w/V03 or Manual Transmission) Cooling Fan Inoperative (LF4) for further diagnosis.
- Ignition ON.
- Verify the KR33 Auxiliary Heater Coolant Pump Relay turns on and off/clicks when commanding the KR33 Auxiliary Heater Coolant Pump Relay On and Off with a scan tool
- Verify the parameters listed below do not display Malfunction when commanding the KR33 Auxiliary Heater Coolant Pump Relay ON and OFF On and Off with a scan tool
- Auxiliary Coolant Pump Relay Control Circuit Open Test Status
- Auxiliary Coolant Pump Relay Control Circuit Low Voltage Test Status
- Auxiliary Coolant Pump Relay Control Circuit High Voltage Test Status
- If Malfunction is displayed
Refer to Circuit/System Testing
- If Malfunction is not displayed
- All OK.
NOTE:
There is a slight delay before the cooling fan activates and reaches full speed.