Lexus IS250 · Service Manual ENGINE

PROBLEM SYMPTOMS TABLE

Troubleshooting

HINT:
  1. Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  1. Inspect the fuses and relays related to the system before inspecting the suspected areas below.

ENTRY AND START SYSTEM 
Symptom
Suspected area
See page
Power does not turn on (neither ACC nor IG is possible).
1. AM2 Fuse
Click here
2. Engine Switch
3. Cowl Side J/B RH
4. Cowl Side J/B LH
5. IG2 Relay
6. Wire Harness or Connector
7. Power Source Control ECU
Power is not turned on (only ACC is not turned on).
1. AM2 Fuse
Click here
2. Cowl Side J/B RH
3. Wire Harness or Connector
4. Power Source Control ECU.
Power is not turned on (only IG is not turned on).
1. AM2 Fuse
Click here
2. Cowl Side J/B RH
3. Cowl Side J/B LH
4. IG2 Relay
5. Wire Harness or Connector
6. Power Source Control ECU
Engine does not start.
1. Power Source Control ECU
Click here
2. Certification ECU
3. Shift Lock Control ECU
4. ID Code Box
5. Stop SW Fuse
6. Stop Light Switch
7. Electrical Steering Lock Function
8. SFI System
9. Engine Immobiliser System
10. Wire Harness or Connector
Engine switch indicator light does not come on.
Engine switch indicator light circuit
Click here
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