All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder: Procedure

1. Check door lock operation. Refer to OPERATION CHECK .

   Result

   Result	Proceed to
   All doors cannot be locked through multiplex network master switch	A
   All doors cannot be locked through driver door key cylinder	B

B → See step   5 

A: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Recheck for DTCs.

   OK

   DTC B1206 is not output.

NG → See step   10 

OK: Go to next step 

1. Replace the multiplex network master switch assembly. Refer to REMOVAL .

NEXT: Go to next step 

1. Check that all doors can be locked and unlocked by using the multiplex network master switch. Refer to OPERATION CHECK .

   OK

   All doors can be locked and unlocked with the multiplex network master switch.

NG → See step   8 

OK → END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE) 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Read the Data List according to the display on the Techstream.
   MAIN BODY (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Door Key SW-Lock	Driver door key-linked lock/unlock switch lock signal/ON or OFF	ON: Driver door key cylinder turned to lock position OFF: Driver door key cylinder not turned to lock position	-
   D Door Key SW-UL	Driver door key-linked lock/unlock switch unlock signal/ON or OFF	ON: Driver door key cylinder turned to unlock position OFF: Driver door key cylinder not turned to unlock position	-

   OK

   The Techstream indicates ON or OFF according to the key cylinder operation shown in the table.

NG → See step   6 

OK → See step   11 

1. Remove the front door lock assembly LH. Refer to REMOVAL .
   Fig 1: Inspecting Front Door Lock Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   9 (L) - 7 (E)	Locked	Below 1 Ω
   9 (L) - 7 (E)	off	10 kΩ or higher
   10 (UL) - 7 (E)	Unlocked	Below 1 Ω
   10 (UL) - 7 (E)	off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Front Door Lock Assembly LH)
   *b	Lock
   *c	off
   *d	Unlock

NG → See step   9 

OK: Go to next step 

1. Disconnect the main body ECU (multiplex network body ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O8-9 (L) - L7-11 (L2)	Always	Below 1 Ω
   O8-10 (UL) - L7-24 (UL3)	Always	Below 1 Ω
   O8-7 (E) - Body ground	Always	Below 1 Ω
   L7-11 (L2) - Body ground	Always	10 kΩ or higher
   L7-24 (UL3) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   11