Toyota Tundra. Manual — part 2715

Fig. 34: Identifying Multiplex Tilt & Telescopic ECU Connector Terminal
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE STEERING COLUMN ASSEMBLY (See STEERING COLUMN ASSEMBLY
(for Power Tilt and Power Telescopic Steering Column) )

OK: REPLACE MULTIPLEX TILT AND TELESCOPIC ECU (See MULTIPLEX TILT AND
TELESCOPIC ECU (for Power Tilt and Power Telescopic Steering Column) )

5. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU -

TELESCOPIC POSITION SENSOR)

a. Disconnect connector A from the multiplex tilt and telescopic ECU.

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION TABLE

Tester Connection

Condition Specified Condition

A-3 (VCE) - Body ground Always

10 kohms or higher

2009 Toyota Tundra

2009 STEERING Steering Column - Tundra

Fig. 35: Identifying Multiplex Tilt & Telescopic ECU
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

6. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY

GROUND)

a. Disconnect the J47 multiplex tilt and telescopic ECU connector.

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION TABLE

Tester Connection

Condition Specified Condition

J47-11 (GND) - Body ground Always

Below 1 ohms

2009 Toyota Tundra

2009 STEERING Steering Column - Tundra

Fig. 36: Identifying J47 Multiplex Tilt & Telescopic ECU Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MULTIPLEX TILT AND TELESCOPIC ECU (See MULTIPLEX TILT AND
TELESCOPIC ECU (for Power Tilt and Power Telescopic Steering Column) )

DTC B2620: ECU POWER SOURCE CIRCUIT MALFUNCTION

DESCRIPTION

The ECU power source circuit supplies positive voltage to the multiplex tilt and telescopic ECU.

DETECTION CONDITION AND TROUBLE AREA TABLE

WIRING DIAGRAM

DTC

Code

Detection Condition

Trouble Area

B2620

The ECU power source voltage drops to 8 V or less and this
condition continues for 10 sees, or more.



Battery



Harness or connector



Multiplex tilt and
telescopic ECU

2009 Toyota Tundra

2009 STEERING Steering Column - Tundra

Fig. 37: Identifying ECU Power Source Circuit Malfunction Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. INSPECT FUSE (ECU-B1)

a. Remove the ECU-B1 fuse from the engine room junction block.

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION TABLE

NG: REPLACE FUSE

OK: Go to next step.

2. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU -

BATTERY)

a. Disconnect the J47 multiplex tilt and telescopic ECU connector.

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

Standard Voltage

STANDARD VOLTAGE SPECIFICATION TABLE

Tester Connection Condition Specified Condition

ECU-B1 fuse

Always

Below 1 ohms

Tester Connection

Condition Specified Condition

2009 Toyota Tundra

2009 STEERING Steering Column - Tundra