MIL Circuit [02/2014 - 11/2016]: Procedure
WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK THAT MIL IS ILLUMINATED
- Perform troubleshooting in accordance with the table below.
Result
Condition Result Proceed to Power switch on (IG) → Power switch on (READY) MIL ON→MIL OFF A MIL does not illuminate B MIL remains ON C
Result: 1
A
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [02/2014 - 11/2016]
Result: 2
B
GO TO VC OUTPUT CIRCUIT. Refer to VC Output Circuit [02/2014 - 11/2016]
Result: 3
C
See step 2
- Perform troubleshooting in accordance with the table below.
- CHECK WHETHER DTC OUTPUT RECURS
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: System Select / Health Check.
- Check if any DTCs have been detected. Note down any DTCs.
Result
Result Proceed to DTCs are not output A DTCs are output B HINT:
Check for detected DTCs output from other ECUs which relate to the MIL.
Result: 2
B
REPAIR CIRCUIT INDICATED BY OUTPUT
Result: 1
A
See step 3
- PERFORM ACTIVE TEST USING TECHSTREAM
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Body Electrical / Combination Meter / Active Test / Check Engine Indicator.
Body Electrical > Combination Meter > Active Test
Tester Display Check Engine Indicator - Check the status of the MIL while performing the Active Test.
Result
Result Proceed to Changes A Does not change B
Result: 1
A
REPLACE ECM. Refer to REMOVAL [02/2014 - 11/2016]
Result: 2
B
REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [02/2014 - ]