POWER DOOR LOCK CONTROL SYSTEM PROBLEM SYMPTOMS TABLE

Note

If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

Note

If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.
As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

*: w/ Door Control Battery

Click here

Tech Tips

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Power Door Lock Control System (All Doors)
Symptom	Suspected Area	Link
All doors lock/unlock functions do not operate via multiplex network master switch assembly or door key cylinder.	Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder"	Click here
All doors lock/unlock functions do not operate via door control switch.	Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch"	Click here
All doors lock function do not operate via multiplex network master switch assembly and door key cylinder.	Instrument panel junction block assembly*1	Click here
	Instrument panel junction block assembly*2	Click here
	Main body ECU (Multiplex network body ECU)*1	Click here
	Main body ECU (Multiplex network body ECU)*2	Click here
All doors unlock function do not operate via multiplex network master switch assembly and door key cylinder.	Instrument panel junction block assembly*1	Click here
	Instrument panel junction block assembly*2	Click here
	Main body ECU (Multiplex network body ECU)*1	Click here
	Main body ECU (Multiplex network body ECU)*2	Click here
All doors LOCK/UNLOCK functions do not operate*3	Proceed to "Power Source Circuit"	Click here

*1: for LHD
*2: for RHD
*3: w/ Door Control Battery

Power Door Lock Control System (Each Door)
Symptom	Suspected Area	Link
Only driver door lock/unlock functions do not operate.	Front door lock assembly LH*1	Click here
	Front door lock assembly RH*2	Click here
	Harness or connector	-
	Instrument panel junction block assembly*1	Click here
	Instrument panel junction block assembly*2	Click here
Only driver door unlock function does not operate (lock function operates).	Instrument panel junction block assembly*1	Click here
	Instrument panel junction block assembly*2	Click here
	Main body ECU (Multiplex network body ECU)*1	Click here
	Main body ECU (Multiplex network body ECU)*2	Click here
Only front passenger door lock/unlock functions do not operate.	Front door lock assembly RH*1	Click here
	Front door lock assembly LH*2	Click here
	Harness or connector	-
	Instrument panel junction block assembly*1	Click here
	Instrument panel junction block assembly*2	Click here
Only rear door LH lock/unlock functions do not operate.	Rear door lock assembly LH	Click here
	Harness or connector	-
	Instrument panel junction block assembly*1	Click here
	Instrument panel junction block assembly*2	Click here
Only rear door RH lock/unlock functions do not operate.	Rear door lock assembly RH	Click here
	Harness or connector	-
	Instrument panel junction block assembly*1	Click here
	Instrument panel junction block assembly*2	Click here
Only back door open function does not operate*3.	Power Back Door System	Click here
Only back door open function does not operate*4.	Proceed to "Only Back Door cannot be Opened"	Click here

*1: for LHD
*2: for RHD
*3: w/ Power Back Door System
*4: w/o Power Back Door System

Power Door Lock Control System (Functions)
Symptom	Suspected Area	Link
Speed-sensitive automatic door lock function does not operate (meter / gauge system operates normally).	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Main body ECU (Multiplex network body ECU)*1	Click here
	Main body ECU (Multiplex network body ECU)*2	Click here
Shift-linked automatic door lock/unlock functions do not operate (automatic transaxle system operates normally).	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Main body ECU (Multiplex network body ECU)*1	Click here
	Main body ECU (Multiplex network body ECU)*2	Click here
	ECM (for 8AR-FTS)	Click here
	ECM (for 3ZR-FAE)	Click here
Key lock-in prevention function does not operate.	Proceed to "Room Oscillator does not Recognize Key" (w/ Entry Function)	Click here
	Proceed to "Room Oscillator does not Recognize Key" (w/o Entry Function)	Click here
	Front door courtesy light switch assembly LH*1	Click here
	Front door courtesy light switch assembly RH*2	Click here
	Harness or connector	-
	Instrument panel junction block assembly*1	Click here
	Instrument panel junction block assembly*2	Click here
	Main body ECU (Multiplex network body ECU)*1	Click here
	Main body ECU (Multiplex network body ECU)*2	Click here
Double locking function does not operate properly*3.	LIN communication system	Click here
	Front door lock assembly LH	Click here
	Front door lock assembly RH	Click here
	Rear door lock assembly LH	Click here
	Rear door lock assembly RH	Click here
	Harness or connector	-
	Double lock door control relay assembly	Click here
	Main body ECU (Multiplex network body ECU)*1	Click here
	Main body ECU (Multiplex network body ECU)*2	Click here
Lock operation continues even after doors have been locked*4	Front door lock assembly LH	Click here
	Front door lock assembly RH	Click here
	Rear door lock assembly LH	Click here
	Rear door lock assembly RH	Click here
	Harness or connector	-
	Instrument panel junction block assembly*1	Click here
	Instrument panel junction block assembly*2	Click here
	Main body ECU (Multiplex network body ECU)*1	Click here
	Main body ECU (Multiplex network body ECU)*2	Click here
Collision door lock release function does not operate*5	Proceed to "Collision Door Lock Release Function does not Operate"	Click here

*1: for LHD
*2: for RHD
*3: w/ Double Locking System
*4: When the door unlock detection switch detects an unlock position signal after a door lock operation has been performed, a door lock operation will be performed 3 times.
*5: w/ Door Control Battery