Toyota Tundra (2015 year). Manual — part 2747

Last Modified: 9-16-2014

6.6 J

Doc ID: RM000002U4V03JX

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: MULTIPLEX COMMUNICATION: LIN COMMUNICATION SYSTEM: Integration Control and Panel Assembly

Communication Error; 2015 MY Tundra [08/2014 - ]

Integration Control and Panel Assembly Communication Error

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

When using the Techstream with the ignition switch OFF to troubleshoot:

Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until

communication between the tester and vehicle begins.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY -
AIR CONDITIONING CONTROL ASSEMBLY)

MULTIPLEX COMMUNICATION: LIN COMMUNICATION SYSTEM: I...

OK

(a) Disconnect the J127 air conditioning control assembly connector.

(b) Disconnect the J19 air conditioning amplifier assembly connector.

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

Standard Resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

J19-37 (LIN1) - J127-7 (STX)

Always

Below 1 Ω

J19-37 (LIN1) or J127-7 (STX) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY -
BATTERY AND BODY GROUND)

MULTIPLEX COMMUNICATION: LIN COMMUNICATION SYSTEM: I...

OK

(a) Disconnect the J127 air conditioning control assembly

connector.

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

Standard Resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

J127-5 (GND) - Body ground

Always

Below 1 Ω

Standard Voltage:

TESTER CONNECTION

SWITCH CONDITION

SPECIFIED CONDITION

J127-4 (IG+) - Body ground

Ignition switch ON

11 to 14 V

Ignition switch OFF

Below 1 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.

CHECK AIR CONDITIONING CONTROL ASSEMBLY (OPERATION)

(a) Temporarily replace the air conditioning control assembly with a new or normally functioning one

.

(b) Check that the malfunction disappears.

OK:

Malfunction disappears.

NG

REPLACE AIR CONDITIONING AMPLIFIER

ASSEMBLY

OK

END (AIR CONDITIONING CONTROL ASSEMBLY IS

MULTIPLEX COMMUNICATION: LIN COMMUNICATION SYSTEM: I...

DEFECTIVE)

MULTIPLEX COMMUNICATION: LIN COMMUNICATION SYSTEM: I...