Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Ignition - On / Vehicle - In Service Mode
- Verify DTC P0641, P0651, P0697, P06A3 is not set.
- If any of the DTCs are set
- Go to next step: If none of the DTCs are set
- Verify the following parameters are within 30°C (54°F) of each other:
- Start-Up IAT Sensor 1
- Start-Up IAT Sensor 2
- Start-Up ECT
- If not in the specified range
Refer to: Circuit/System Testing
- Go to next step: If in the specified range
- Engine - Idling
- Verify the scan tool parameter:=-39 to 149°C (-38 to 300°F) and changes
- IAT Sensor 1
- IAT Sensor 2
- Start-Up ECT
- If not in the specified range or does not change
Refer to: Circuit/System Testing
- Go to next step: If in the specified range and changes
- Verify the appropriate scan tool parameter:
- IAT Sensor 1
- IAT Sensor 2
- Wiggle the harness and connector:B75C Multifunction Intake Air Sensor
- Wiggle the harness and connector: K20 Engine Control Module
- If the value spikes or drops out
Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)
- Go to next step: If the value does not spike or drop out
- All OK.
NOTE:
To minimize the effects of residual engine heat and heating elements inside the sensor, perform step 3 of this procedure only if the ignition has been Off for longer than 8 h.