Lexus IS250 · Service Manual BODY ELECTRICAL

PROBLEM SYMPTOMS TABLE

Troubleshooting

Proceed to the reference page shown in the table below for each malfunction symptom and troubleshoot each circuit.
WIRELESS DOOR LOCK CONTROL SYSTEM 
Symptom
 Suspected area
 See page
The wireless door lock control system does not operate.
 1. Perform the operation check
 Click here
2. Check if the MULTIPLEX communication DTC is output
 Click here
3. Door control transmitter
 Click here
4. Door courtesy light switch circuit
 Click here
5. Luggage compartment door courtesy light switch
 Click here
6. Power source circuit
 Click here
7. Replace door control receiver
 -
8. Replace certification ECU
 -
9. If the symptom still occurs after the above areas have been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -
The panic alarm function only does not operate.*
 1. Perform the operation check
 Click here
2. Door control transmitter
 Click here
3. If the symptom still occurs after the above area has been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -
The panic alarm function does not operate (Vehicle horn).*
 1. Perform the operation check
 Click here
2. Horn circuit
 Click here
3. If the symptom still occurs after the above areas have been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B H)
 -
The panic alarm function does not operate (Security horn).*
 1. Perform the operation check
 Click here
2. Security horn circuit
 Click here
3. If the symptom still occurs after the above areas have been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -
The panic alarm function does not operate (Hazard warning light).*
 1. Perform the operation check
 Click here
2. Wire harness
 -
3. Turn signal flasher
 Click here
4. If the symptom still occurs after the above areas have been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -
The panic alarm function does not operate (Headlight or taillight).*
 1. Perform the operation check
 Click here
2. Lighting system
 Click here
3. If the symptom still occurs after the above areas have been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -
The automatic lock function does not operate normally.
 1. Perform the operation check
 Click here
2. Door courtesy light switch circuit
 Click here
3. If the symptom still occurs after the above areas have been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -
The door ajar warning function only does not operate.
 1. Perform the operation check
 Click here
2. Door courtesy switch circuit
 Click here
3. If the symptom still occurs after the above areas have been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -
The illuminated entry function only does not operate.
 1. Perform the operation check
 Click here
2. Lighting system
 Click here
3. If the symptom still occurs after the above area has been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -
The answer back function does not operate (Wireless door lock buzzer).*
 1. Perform the operation check
 Click here
2. Wireless door lock buzzer circuit*
 Click here
3. If the symptom still occurs after the above areas have been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -
The answer back function does not operate (Hazard warning light).
 1. Perform the operation check
 Click here
2. Wire harness
 -
3. Turn signal flasher
 Click here
4. If the symptom still occurs after the above areas have been inspected and proved to be normal, replace the main body ECU RH (cowl side J/B RH)
 -

HINT:
*: Australia, New Zealand

← CUSTOMIZE PARAMETERSTERMINALS OF ECU →