Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.

DTCs related to the following system/component = Not Set
- B34 Engine Coolant Temperature Sensor
- If a related DTC is set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If a related DTC is not set
Ignition/Vehicle - Off
Verify the following conditions do not exist:
- G17 Heater Coolant Pump - Abnormal noise /Leaking/Loose Clamps/Visible Damage
- Air Pocket @Cooling System - Refer to: Cooling System Draining and Filling (Static LM2) , or Cooling System Draining and Filling (GE 47716 LM2)
- Antifreeze Concentration - Incorrect - Refer to: Cooling System Draining and Filling (Static LM2) , or Cooling System Draining and Filling (GE 47716 LM2)
- Hoses/Lines@Cooling System - Kinked/Leaking/Restricted/Visible Damage
- Hoses/Lines@G17 Heater Coolant Pump - Kinked/Leaking/Restricted/Visible Damage
- Incorrect fluid level or condition - Coolant@Surge Tank - Refer to: Loss of Coolant
- If a condition exists
  Repair or replace as necessary
- Go to next step: If no condition exists
Ignition - On/Vehicle - In Service Mode
Verify DTC U137E is not set and no other DTCs are set.
- If DTC U137E is set and no other DTCs are set
  Replace the component: G17 Heater Coolant Pump
- Go to next step: If the DTC is not set
Verify DTC U0623 is not set.
- If DTC U0623 is set
  Refer to: Circuit/System Testing
- Go to next step: If the DTC is not set
Verify DTC P261F, P2B86, P2B87, P3077, P3078 is not set.
- If any of the DTCs are set
  Replace the component: G17 Heater Coolant Pump
- Go to next step: If none of the DTCs are set
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
- If the DTC sets
  Refer to: Circuit/System Testing
- Go to next step: If the DTC is not set
All OK.