Toyota CH-R Service Manual: All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder

Toyota CH-R Service Manual / Door Lock / Power Door Lock Control System / All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or 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 lock or unlock switch signals from the front door lock with motor assembly LH. The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration*.

    Click here

    • *: w/ Smart Key System
  • The power door lock control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power door lock control system after confirming that the communication systems are functioning properly.

    Click here

PROCEDURE

1.

CHECK DOOR LOCK OPERATION

(a) Check door lock operation.

Click here

Result

Proceed to

All doors cannot be locked by multiplex network master switch assembly

A

All doors cannot be locked by driver door key cylinder

B
B

GO TO STEP 5

A

2.

CHECK FOR DTC (LIN COMMUNICATION SYSTEM)

(a) Clear the DTCs.

Click here

Body Electrical > Main Body > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTC B1206 is not output.

NG

GO TO LIN COMMUNICATION SYSTEM (DTC B1206)

OK

3.

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Replace the multiplex network master switch assembly.

Click here

NEXT

4.

CHECK DOOR LOCK OPERATION

(a) Check that all doors can be locked and unlocked by the multiplex network master switch assembly.

Click here

OK:

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

OK

END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE)
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

5.

READ VALUE USING TECHSTREAM (Door Key SW-Lock, D Door Key SW-UL)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Door Key SW-Lock

Driver door key-linked lock / unlock switch lock signal

OFF or ON

OFF: Driver door key cylinder not turned to lock position

ON: Driver door key cylinder turned to lock position

-

D Door Key SW-UL

Driver door key-linked lock / unlock switch unlock signal

OFF or ON

OFF: Driver door key cylinder not turned to unlock position

ON: Driver door key cylinder turned to unlock position

-
Body Electrical > Main Body > Data List

Tester Display

Door Key SW-Lock

D Door Key SW-UL
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

6.

INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY

(a) Remove the front door lock with motor assembly LH.

Click here

(b) Inspect the front door lock with motor assembly LH.

Click here

NG

REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY

OK

7.

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

(a) Disconnect the F15 main body ECU (multiplex network body ECU) connector.

(b) Disconnect the J4 front door lock with motor assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J4-9 (L) - F15-29 (L2)

Always

Below 1 Ω

J4-10 (UL) - F15-2 (UL3)

Always

Below 1 Ω

J4-7 (E) - Body ground

Always

Below 1 Ω

J4-9 (L) or F15-29 (L2) - Body ground

Always

10 kΩ or higher

J4-10 (UL) or F15-2 (UL3) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
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