POWER DOOR LOCK CONTROL SYSTEM All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder

DESCRIPTION

The main body ECU (multiplex network body ECU) receives switch signals from the multiplex network master switch assembly and driver door key cylinder switch signals from the front door lock assembly LH. The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

for LHD

*1	Multiplex Network Master Switch Assembly
*2	Main Body ECU (Multiplex Network Body ECU)
*3	Front Door Lock Assembly LH
*4	LIN Communication Line

PROCEDURE

1. CHECK DOOR LOCK OPERATION

   
   

   1. Check door lock operation Click here.

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

   
   

   B

   READ VALUE USING GTS (DOOR KEY-LINKED LOCK AND UNLOCK SWITCH) Click here

   A

2. CHECK DTC OUTPUT (LIN COMMUNICATION SYSTEM)

   
   

   1. Clear the DTC Click here.

   2. Recheck for DTCs.

      OK
      DTC B1206 is not output.

   
   

   NG

   GO TO LIN COMMUNICATION SYSTEM (DTC B1206) Click here

   OK

3. REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

   
   

   1. Replace the multiplex network master switch assembly Click here.

   
   

   NEXT

4. CHECK DOOR LOCK OPERATION

   
   

   1. Check that all doors can be locked and unlocked by using the multiplex network master switch assembly Click here.

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

   
   

   OK

   END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE)

   NG

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

5. READ VALUE USING GTS (DOOR KEY-LINKED LOCK AND UNLOCK SWITCH)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Main Body / Data List.

   5. Read the Data List according to the display on the GTS.

      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	-
      Door Key SW-Unlock	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 GTS indicates ON or OFF according to the key cylinder operation shown in the table.

   
   

   OK

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

   NG

6. INSPECT FRONT DOOR LOCK ASSEMBLY

   
   

   1. for LHD:

      
      

      1. Remove the front door lock assembly LH Click here.

      2. 

         Text in Illustration

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

         Measure the resistance according to the value(s) in the table below.

         Standard Resistance
         Tester Connection Condition Specified Condition 9 (L) - 7 (E) Turned to lock Below 1 Ω 9 (L) - 7 (E) Not turned 10 kΩ or higher 10 (UL) - 7 (E) Turned to unlock Below 1 Ω 10 (UL) - 7 (E) Not turned 10 kΩ or higher

   2. for RHD without Double Locking System:

      
      

      1. Remove the front door lock assembly RH Click here.

      2. 

         Text in Illustration

         *a	Component without harness connected (Front Door Lock Assembly RH)
         *b	Unlock
         *c	Lock

         Measure the resistance according to the value(s) in the table below.

         Standard Resistance
         Tester Connection Condition Specified Condition 6 (L) - 8 (E) Turned to lock Below 1 Ω 6 (L) - 8 (E) Not turned 10 kΩ or higher 5 (UL) - 8 (E) Turned to unlock Below 1 Ω 5 (UL) - 8 (E) Not turned 10 kΩ or higher

   3. for RHD with Double Locking System:

      
      

      1. Remove the front door lock assembly RH Click here.

      2. 

         Text in Illustration

         *a	Component without harness connected (Front Door Lock Assembly RH)
         *b	Unlock
         *c	Lock

         Measure the resistance according to the value(s) in the table below.

         Standard Resistance
         Tester Connection Condition Specified Condition 6 (L) - 8 (E) Turned to lock Below 1 Ω 6 (L) - 8 (E) Not turned 10 kΩ or higher 5 (UL) - 8 (E) Turned to unlock Below 1 Ω 5 (UL) - 8 (E) Not turned 10 kΩ or higher

   
   

   NG

   REPLACE FRONT DOOR LOCK ASSEMBLY LH Click here

   OK

7. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

   
   

   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
      for LHD Tester Connection Condition Specified Condition O8-9 (L) - L7-11 (L2) Always Below 1 Ω O8-10 (UL) - L7-12 (UL2) Always Below 1 Ω O8-7 (E) - Body ground Always Below 1 Ω L7-11 (L2) - Body ground Always 10 kΩ or higher L7-12 (UL2) - Body ground Always 10 kΩ or higher
      for RHD without Double Locking System Tester Connection Condition Specified Condition N8-6 (L) - L7-11 (L2) Always Below 1 Ω N8-5 (UL) - L7-12 (UL2) Always Below 1 Ω N8-8 (E) - Body ground Always Below 1 Ω L7-11 (L2) - Body ground Always 10 kΩ or higher L7-12 (UL2) - Body ground Always 10 kΩ or higher
      for RHD with Double Locking System Tester Connection Condition Specified Condition N8-6 (L) - L7-11 (L2) Always Below 1 Ω N8-5 (UL) - L7-12 (UL2) Always Below 1 Ω N8-8 (E) - Body ground Always Below 1 Ω L7-11 (L2) - Body ground Always 10 kΩ or higher L7-12 (UL2) - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR