NETWORKING: LIN COMMUNICATION SYSTEM: DESCRIPTION (2008 Sequoia)

Last Modified: 11-29-2007		1.6 C
Service Category: Power Source/Network	Section: Networking
Model Year: 2008	Model: Sequoia	Doc ID: RM000002S8B007X
Title: NETWORKING: LIN COMMUNICATION SYSTEM: DESCRIPTION (2008 Sequoia)

DTC

B1206

P/W Master Switch Communication Stop

DESCRIPTION

This DTC is stored when LIN communication between the power window regulator master switch assembly and main body ECU stops for 10 seconds or more.

DTC Code	DTC Detection Condition	Trouble Area
B1206	No communication between the master switch and main body ECU for 10 seconds or more.	Power window regulator master switch assembly Main body ECU Harness or connector

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 Techstream and vehicle begins.

HINT:

DTC B2325 is stored when the communication between the master switch and main body ECU stops.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH)

(a) Disconnect the H2 main body ECU connector.

(b) Disconnect the M2 power window regulator master switch assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
H2-10 (LIN2) - M2-6 (LIN1)	Always	Below 1 Ω
H2-10 (LIN2) or M2-6 (LIN1) - Body ground	Always	10 kΩ or higher

Standard Voltage:

Tester Connection	Condition	Specified Condition
M2-6 (LIN1) - Body ground	Always	Below 1 V

(d) Reconnect the main body ECU connector.

(e) Reconnect the power window regulator master switch assembly connector.

2.	CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (MASTER SWITCH - BATTERY AND BODY GROUND)

(a) Disconnect the M2 power window regulator master switch assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M2-1 (E) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Condition	Specified Condition
M2-3 (B) - Body ground	Always	11 to 14 V

3.	REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

(a) Temporarily replace the power window regulator master switch assembly with a new or normally functioning one .

(b) Clear the DTC .

4.	CHECK FOR DTC

(a) Recheck for DTCs .

Result

Result	Proceed to
DTC B1206 is not output	A
DTC B1206 is output	B