Toyota Tundra Service Manual: All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

Toyota Tundra Service Manual / Vehicle Interior / Door Lock / Power Door Lock Control System / All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

DESCRIPTION

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

WIRING DIAGRAM

w/o Jam Protection Function: w/ Jam Protection Function:

CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the ignition switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Main Body. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
  • 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 power window regulator master switch assembly (door control switch assembly LH) (w/o Jam Protection Function)

A

All doors cannot be locked by power window regulator master switch assembly (door control switch assembly LH) (w/ Jam Protection Function)

B

All doors cannot be locked by door control switch assembly RH

C

B

GO TO STEP 6

C

GO TO STEP 7

A

2.

READ VALUE USING TECHSTREAM (Door Lock SW-Lock, Door Lock SW-Unlock)

(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.

Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Door Lock SW-Lock

Door control switch lock signal/ON or OFF

ON: Door control switch assembly LH is pushed to LOCK

OFF: Both door control switch assembly LH and RH are not pushed to LOCK

-

Door Lock SW-Unlock

Door control switch lock signal/ON or OFF

ON: Door control switch assembly LH is pushed to UNLOCK

OFF: Both door control switch assembly LH and RH are not pushed to UNLOCK

-

OK:

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

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

3.

INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (DOOR CONTROL SWITCH ASSEMBLY LH)

(a) Remove the power window regulator master switch assembly (door control switch assembly LH).

Click here

(b) Inspect the power window regulator master switch assembly (door control switch assembly LH).

Click here

NG

REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (DOOR CONTROL SWITCH ASSEMBLY LH)

OK

4.

CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (DOOR CONTROL SWITCH ASSEMBLY LH) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the N2 power window regulator master switch assembly (door control switch assembly LH) connector.

(b) Disconnect the M5 door control switch assembly RH connector.

(c) Remove the main body ECU (multiplex network body ECU).

Click here

(d) Connect the driver side junction block assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N2-2 (L) - A-20 (L1)

Always

Below 1 Ω

N2-9 (UL) - A-22 (UL1)

Always

Below 1 Ω

N2-1 (E) - Body ground

Always

Below 1 Ω

N2-2 (L) or A-20 (L1) - Body ground

Always

10 kΩ or higher

N2-9 (UL) or A-22 (UL1) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

5.

CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (DOOR CONTROL SWITCH ASSEMBLY LH) - DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

(a) Disconnect the N2 power window regulator master switch assembly (door control switch assembly LH) connector.

(b) Disconnect the M5 door control switch assembly RH connector.

(c) Disconnect the 3J and 3I driver side junction block assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N2-2 (L) - 3I-16

Always

Below 1 Ω

N2-9 (UL) - 3J-39

Always

Below 1 Ω

N2-1 (E) - Body ground

Always

Below 1 Ω

N2-2 (L) or 3I-16 - Body ground

Always

10 kΩ or higher

N2-9 (UL) or 3J-39 - Body ground

Always

10 kΩ or higher

OK

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

READ VALUE USING TECHSTREAM (Door Lock Switch Status, Door Unlock Switch Status)

(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 / Master Switch / Data List.

(e) According to the display on the Techstream, read the "Data List".

Master Switch

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Door Lock Switch Status

Driver door lock switch signal/ON or OFF

ON: Door control switch assembly LH turned to LOCK

OFF: Door control switch assembly LH not turned

-

Door Unlock Switch Status

Driver door unlock switch signal/ON or OFF

ON: Door control switch assembly LH turned to UNLOCK

OFF: Door control switch assembly LH not turned

-

OK:

The display is as specified in the normal condition column.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER WINDOW REGULATOR MASTER SWITCH

7.

READ VALUE USING TECHSTREAM (Door Lock SW-Lock, Door Lock SW-Unlock)

(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.

Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Door Lock SW-Lock

Door control switch lock signal/ON or OFF

ON: Door control switch assembly RH is pushed to LOCK

OFF: Both door control switch assembly LH and RH are not pushed to LOCK

-

Door Lock SW-Unlock

Door control switch lock signal/ON or OFF

ON: Door control switch assembly RH is pushed to UNLOCK

OFF: Both door control switch assembly LH and RH are not pushed to UNLOCK

-

OK:

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

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

8.

INSPECT DOOR CONTROL SWITCH ASSEMBLY RH

(a) Remove the door control switch assembly RH.

Click here

(b) Inspect the door control switch assembly RH.

Click here

NG

REPLACE DOOR CONTROL SWITCH ASSEMBLY RH

OK

9.

CHECK HARNESS AND CONNECTOR (DOOR CONTROL SWITCH ASSEMBLY RH - DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

(a) Disconnect the M5 door control switch assembly RH connector.

(b) Disconnect the N2 power window regulator master switch assembly (door control switch assembly LH) connector.

(c) Remove the main body ECU (multiplex network body ECU).

Click here

(d) Connect the driver side junction block assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

M5-4 (L) - A-20 (L1)

Always

Below 1 Ω

M5-2 (UL) - A-22 (UL1)

Always

Below 1 Ω

M5-3 (E) - Body ground

Always

Below 1 Ω

M5-4 (L) or A-20 (L1) - Body ground

Always

10 kΩ or higher

M5-2 (UL) or A-22 (UL1) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

10.

CHECK HARNESS AND CONNECTOR (DOOR CONTROL SWITCH ASSEMBLY RH - DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

(a) Disconnect the M5 door control switch assembly RH connector.

(b) Disconnect the N2 power window regulator master switch assembly (door control switch assembly LH) connector.

(c) Disconnect the 3J and 3I driver side junction block assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

M5-4 (L) - 3I-16

Always

Below 1 Ω

M5-2 (UL) - 3J-39

Always

Below 1 Ω

M5-3 (E) - Body ground

Always

Below 1 Ω

M5-4 (L) or 3I-16 - Body ground

Always

10 kΩ or higher

M5-2 (UL) or 3J-39 - Body ground

Always

10 kΩ or higher

OK

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Power Door Lock Control System

    All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder

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