LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 165 (Engine Controls And Fuel - 2.7L (L3B) - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC P0030-P0032, P0036-P0038, P0054, P0135, P0141, P103B, or P103C >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:
    • This procedure uses generic scan tool control functions and parameter names.For detailed scan tool information, refer to: Diagnostic Aids
    • For component location, refer to: Diagnostic Aids or Repair Instructions
  1. Ignition - On / Vehicle - In Service Mode
    2. NOTE:

    This step only applies to the following component DTCs: Heated Oxygen Sensor Heater

  2. Verify DTC P103B, P103C is not set and no other DTCs are set.
    • If DTC P103B, P103C is set and other DTCs are set 

      Refer to: Circuit/System Testing - Test 1

    • If DTC P103B, P103C is not set and other DTCs are set 

      Refer to: Circuit/System Testing - Test 1

    • If DTC P103B, P103C is set and no other DTCs are set 

      Refer to: Circuit/System Testing - Test 2

    • Go to next step: If no DTC is set 
  3. Perform the appropriate scan tool control function: Heated Oxygen Sensor Heater - Command the component to the maximum position/speed & Release Control

    Verify the appropriate scan tool parameter:

    • Heated Oxygen Sensor Heater Control Circuit High Test Status = Not Run or Okay
    • Heated Oxygen Sensor Heater Control Circuit Low Test Status = Not Run or Okay
    • Heated Oxygen Sensor Heater Control Circuit Open Test Status = Not Run or Okay
    • If not the specified state 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  4. Verify the appropriate scan tool parameter:
    • Heated Oxygen Sensor Heater = 0.3 to 4.0 A
    • Heated Oxygen Sensor 2 Heater = 0.3 to 2.5 A
    • If not in the specified range 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If in the specified range 
  5. Verify the appropriate scan tool parameter:
    • Heated Oxygen Sensor Heater Control Circuit High Test Status = Not Run or Okay
    • Heated Oxygen Sensor Heater Control Circuit Low Test Status = Not Run or Okay
    • Heated Oxygen Sensor Heater Control Circuit Open Test Status = Not Run or Okay
    • Perform the action while monitoring the parameter:
    • Wiggle the harness and connector: B52 Heated Oxygen Sensor
    • Wiggle the harness and connector: K20 Engine Control Module
    • If not the specified state 

      Repair as necessary - Wiring / Terminal (s) / Electrical Connector (s)

    • Go to next step: If the specified state 
  6. 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 step 2

    • Go to next step: If the DTC is not set 
  7. All OK.
scientia non olet · About LEMON Manuals