Toyota Tundra. Manual — part 463

Fig. 7: Identifying DA And DD ECU Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) RESISTANCE AND VOLTAGE
SPECIFICATION

Terminal No.

(Symbols)

Wiring Color

Terminal

Description

Condition

Specified

Condition

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Multiplex Communication - Tundra

If the result is not as specified, there may be a malfunction on the wire harness side.

4. CHECK SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)

a. Disconnect the W3 ECU connector.

Fig. 8: Identifying W3 ECU Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) RESISTANCE
AND VOLTAGE SPECIFICATION

DA-1 (ACC) - Body
ground

B - Body

ground

ACC power supply

Ignition switch

OFF

Below 1 V

Ignition switch

ACC

11 to 14 V

DA-1 (IG) - Body
ground

B - Body

ground

IG power supply

Ignition switch

OFF

Below 1 V

Ignition switch

ON

11 to 14 V

DD-62 (GND1)-Body
ground

W-B - Body

ground

Body ground

Always

Below 1 ohms

DD-62 (GND2) - Body
ground

W-B - Body

ground

Body ground

Always

Below 1 ohms

Terminal No.

(Symbols)

Wiring Color

Terminal

Description

Condition

Specified

Condition

W3-8 (E) - Body
ground

W-B - Body

ground

Ground

Always

Below 1 ohms

W3-9 (IG) - Body
ground

SB - Body

ground

IG power supply

Ignition switch

ON

11 to 14 V

Ignition switch

OFF

Below 1 V

W3-10 (B) - Body
ground

L - Body ground

+B power supply

Always

11 to 14 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Multiplex Communication - Tundra

If the result is not as specified, there may be a malfunction on the wire harness side.

DTC CHECK / CLEAR

HINT:

Refer to the Techstream operator's manual for further details.

1. CHECK DTC

a. Warm up the engine.

b. Turn the ignition switch OFF.

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch ON.

e. Turn the tester on.

f. Enter the following menus:

Select: Body Electrical / Main Body / Trouble Codes.

g. Read the DTCs by following the directions on the tester's screen.

2. CLEAR DTC

a. Warm up the engine.

b. Turn the ignition switch OFF.

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch ON.

e. Turn the tester on.

f. Enter the following menus:

Select: Body Electrical / Main Body / Trouble Codes.

g. Erase the DTCs by following the directions on the tester's screen.

DATA LIST / ACTIVE TEST

1. READ DATA LIST

HINT:

Using the Techstream to read the Data List allows values or states of switches, sensors, actuators and
other items to be read without removing any parts. This non-intrusive inspection can be very useful
because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading
the Data List information early in troubleshooting is one way to save diagnostic time.

NOTE:

In the table below, the values listed under "Normal Condition" are
reference values. Do not depend solely on these reference values when

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Multiplex Communication - Tundra

a. Warm up the engine.

b. Turn the ignition switch OFF.

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch ON.

e. Turn the tester on.

f. Enter the following menus:

Select: Body Electrical / Main Body / Data List.

g. According to the display on tester, read the "Data List".

Main Body:

DATA LIST - MAIN BODY

DIAGNOSTIC TROUBLE CODE CHART

HINT:



If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code.



Inspect the fuses and relays related to this system before inspecting the suspected areas below.

LIN Communication System

LIN COMMUNICATION SYSTEM - DIAGNOSTIC TROUBLE CODE CHART

deciding whether a part is faulty or not.

Tester Display

Measurement Item/Range

Normal

Condition

Diagnostic Note

Communication
Slide Roof

Connection status between sliding
roof ECU and main body ECU / OK
or STOP

OK:
Connection
STOP: No
connection

When there is
malfunction, DTC is
output

DTC Code

Detection Item

Trouble Area

B1273

Sliding Roof ECU Communication
Stop



Main body ECU



Sliding roof drive gear sub-
assembly



Harness or connector

B2325

LIN Communication Bus
Malfunction



Main body ECU



Sliding roof drive gear sub-
assembly



Harness or connector

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Multiplex Communication - Tundra