Help with ls400 91, door lock rocker switch
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Joined: Mar 2009
Posts: 81
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From: LA
Help with ls400 91, door lock rocker switch
I just received a new "used" window master control switch for the frt left door panel. the new one works great and has the door lock switch intact - old one had rocker switch/button missing therefore could not use! PROBLEM When I unlock all is fine, BUT when I push the lock side down, rocker switch lights briefly (lock side) , all doors lock and right away release again ! Any fix for this? 
Thanks
All your help is apreciated ! Fixing a bargain purchase 1991 LS400
Thanks
All your help is apreciated ! Fixing a bargain purchase 1991 LS400
Lead Lap
Joined: Jun 2008
Posts: 421
Likes: 0
From: indianapolis
Trouble Suspect Area (terminal No.) Parts name
Door lock system does not operate by
door key.
Refer to ”POWER DOOR LOCK CONTROL
SYSTEM”.
–
Door lock system do operate by door key.
Fail–safe mode caused by error on jam protection
sensor of power window.
(Operation of power window with multi–function
transmitter is prohibited.)
HINT: DTC 31 – 38 output
Refer to ”Multiplex Communication SystemDoor lock system does not operate by
door key.
Refer to ”POWER DOOR LOCK CONTROL
SYSTEM”.
–
Door lock system do operate by door key.
Fail–safe mode caused by error on jam protection
sensor of power window.
(Operation of power window with multi–function
transmitter is prohibited.)
HINT: DTC 31 – 38 output
Lead Lap
Joined: Jun 2008
Posts: 421
Likes: 0
From: indianapolis
POWER DOOR LOCK CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex communication
system before you proceed with troubleshooting.
system before you proceed with troubleshooting.
Symptom Suspect Area See page
All the doors cannot be locked or unlocked.
1. Door Lock Control Switch
2. Driver Door ECU
3. Front Passenger Door ECU
4. Multiplex Communication Circuit
5. Body ECU
6. Wire Harness
All the doors cannot be locked or unlocked.
1. Door Lock Control Switch
2. Driver Door ECU
3. Front Passenger Door ECU
4. Multiplex Communication Circuit
5. Body ECU
6. Wire Harness
BE–139
DI–727
DI–760
DI–838
DI–661
DI–727
DI–760
DI–838
DI–661
Only driver’s side door lock control does not operate.
1. Driver Door ECU
2. Driver’s Door Lock Motor
3. Wire Harness
1. Driver Door ECU
2. Driver’s Door Lock Motor
3. Wire Harness
DI–727
BE–139
BE–139
Other doors than the driver’s side door do not operate.
1. Driver Door ECU
2. Multiplex Communication Circuit
3. Body ECU
4. Wire Harness
5. Door Lock Motor
1. Driver Door ECU
2. Multiplex Communication Circuit
3. Body ECU
4. Wire Harness
5. Door Lock Motor
DI–727
DI–838
DI–661
BE–139
DI–838
DI–661
BE–139
Door key related function does not operate.
1. Door Key Lock and Unlock Switch
2. Wire Harness
1. Door Key Lock and Unlock Switch
2. Wire Harness
BE–139
Key confinement prevention function does not operate.
1. Key Unlock Warning Switch
2. Wire Harness
3. Body ECU
1. Key Unlock Warning Switch
2. Wire Harness
3. Body ECU
BE–33
DI–661
DI–661
Luggage compartment door opener function does not operate.
1. Luggage Compartment Door Opener Switch
2. Luggage Compartment Door Key Lock and
Unlock Switch
3. Luggage Compartment Door Opener Motor
4. Wire Harness
5. Body ECU
1. Luggage Compartment Door Opener Switch
2. Luggage Compartment Door Key Lock and
Unlock Switch
3. Luggage Compartment Door Opener Motor
4. Wire Harness
5. Body ECU
BE–139
BE–139
BE–139
DI–661BE–139
BE–139
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