Toyota Tundra. Manual — part 282

a. Reconnect the cable from the negative (-) battery terminal before measuring the resistances of the

main wire and the branch wire.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION TABLE

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION TABLE

Fig. 55: Identifying J47 Multiplex Tilt And Telescopic ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MULTIPLEX TILT AND TELESCOPIC ECU (See DISASSEMBLY )

SKID CONTROL ECU COMMUNICATION STOP MODE

DESCRIPTION

Tester Connection

Condition Specified Condition

J47-11 (GND) - Body ground Always

Below 1 ohms

Tester Connection

Switch Condition Specified Condition

J47-2 (+B) - Body ground

Always

11 to 14 V

J47-9 (ECUB) - Body ground

J47-8 (IG) - Body ground

Ignition switch ON

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

SYMPTOM TABLE

WIRING DIAGRAM

Fig. 56: Identifying Skid Control ECU Communication Stop Mode - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with
the CAN, which causes resistance variation.

Detection Item

Symptom

Trouble Area

SKID CONTROL ECU
COMMUNICATION STOP
MODE

When either condition below is met:



ABS/VSC/TRAC is not displayed on
"CAN Bus Check".



Applies to "SKID CONTROL ECU
CONDITION COMMUNICATION STOP
MODE" in "DTC COMBINATION
TABLE".



Power source or
inside skid control
ECU with actuator



Skid control ECU
with actuator
branch wire or
connector



Skid control ECU
with actuator

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

a. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the

main wire and the branch wire.

2. CHECK FOR OPEN IN CAN BUS WIRE (SKID CONTROL ECU WITH ACTUATOR BRANCH

WIRE)

a. Disconnect the A17 skid control ECU with actuator connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION TABLE

Fig. 57: Identifying A17 Skid Control ECU With Actuator Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR
(CANH, CANL)

CAUTION: Wait at least 90 seconds after disconnecting the cable from the

negative (-) battery terminal to prevent airbag and seat belt
pretensioner activation.

NOTE:

After the ignition switch is turned OFF, the navigation system
requires approximately 90 seconds to record various types of
memory and settings. As a result, after turning the ignition switch
OFF, wait 90 seconds or more before disconnecting the cable from
the negative (-) battery terminal.

Tester Connection

Switch Condition Specified Condition

A17-5 (CANH) - A17-4 (CANL) Ignition switch OFF

54 to 69 ohms

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

OK: Go to Next Step

3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU WITH ACTUATOR -

BATTERY AND BODY GROUND)

a. Reconnect the cable to the negative (-) battery terminal before measuring the resistances of the

main wire and the branch wire.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION TABLE

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION TABLE

Fig. 58: Identifying A17 Skid Control ECU With Actuator Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE SKID CONTROL ECU WITH ACTUATOR (See REMOVAL )

Tester Connection

Condition Specified Condition

A17-1 (GND1) - Body ground Always

Below 1 ohms

Tester Connection

Switch Condition Specified Condition

A17-16 (+BM) - Body ground

Always

11 to 14 V

A17-47 (+BS) - Body ground

A17-9 (IG1) - Body ground Ignition switch ON

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra