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Inspection procedure 2: The malfunction indicator lamp (SERVICE ENGINE SOON or check engine lamp) does not illuminate right after the power supply mode of the electric motor switch is turned on
 
 
 
 
CIRCUIT OPERATION
  • The combination meter causes the malfunction indicator lamp (SERVICE ENGINE SOON or Check Engine Lamp) to illuminate immediately after the power supply mode of the electric motor switch is turned on occurred.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this case:)
  • Combination meter failed.

 
 
DIAGNOSIS
STEP 1. Check the trouble symptoms.
(1) Turn on the power supply mode of the electric motor switch.
  • The malfunction indicator lamp (SERVICE ENGINE SOON or Check Engine Lamp) should illuminate immediately after the power supply mode of the electric motor switch is turned on.
(2) Turn off the power supply mode of the electric motor switch.
Does the malfunction indicator lamp (SERVICE ENGINE SOON or Check Engine Lamp) illuminate?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Check the combination meter system. Refer to GROUP 54A, Combination Meter - Trouble Symptom Chart .