Toyota Tundra. Manual — part 283

AIR CONDITIONING AMPLIFIER COMMUNICATION STOP MODE

DESCRIPTION

SYMPTOM TABLE

WIRING DIAGRAM

Fig. 59: Identifying Air Conditioning Amplifier Communication Stop Mode - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

Detection Item

Symptom

Trouble Area

AIR CONDITIONING
AMPLIFIER
COMMUNICATION STOP
MODE

When either condition below is met:



Air Conditioner is not displayed on
"CAN Bus Check".



Applies to "AIR CONDITIONING
AMPLIFIER COMMUNICATION
STOP MODE" in "DTC
COMBINATION TABLE".



Power source or
inside air
conditioning
amplifier



Air conditioning
amplifier branch
wire or connector



Air conditioning
amplifier

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

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

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 (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

a. Disconnect the J19 air conditioning amplifier connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION TABLE

Fig. 60: Identifying J19 Air Conditioning Amplifier Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE AIR CONDITIONING AMPLIFIER BRANCH WIRE OR

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

J19-11 (CANH) - J19-12 (CANL) Ignition switch OFF

54 to 69 ohms

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

CONNECTOR (CANH, CANL)

OK: Go to Next Step

3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - 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. 61: Identifying J19 Air Conditioning Amplifier Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (See AIR CONDITIONING

Tester Connection

Condition Specified Condition

J19-14 (GND) - Body ground Always

Below 1 ohms

Tester Connection

Switch Condition Specified Condition

J19-21 (B) - Body ground

Always

11 to 14 V

J19-1 (IG+) - Body ground Ignition switch ON

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

AMPLIFIER )

STEERING ANGLE SENSOR COMMUNICATION STOP MODE

DESCRIPTION

SYMPTOM TABLE

WIRING DIAGRAM

Fig. 62: Identifying Steering Angle Sensor Communication Stop Mode - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

Detection Item

Symptom

Trouble Area

STEERING ANGLE SENSOR
COMMUNICATION STOP
MODE

When either condition below is met:



Steering Angle Sensor is not displayed on
"CAN Bus Check".



Applies to "STEERING ANGLE
SENSOR COMMUNICATION STOP
MODE" in "DTC COMBINATION
TABLE".



Power source or
inside steering
angle sensor



Steering angle
sensor branch
wire or connector



Steering angle
sensor

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra