NETWORKING: CAN 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: RM000002VTO002X
Title: NETWORKING: CAN COMMUNICATION SYSTEM: DESCRIPTION (2008 Sequoia)

DTC

U0208

Lost Communication with "Seat Control Module A"

DESCRIPTION

DTC Code	DTC Detection Condition	Trouble Area
U0208	No communication from power seat control ECU	Power source circuit of power seat control ECU Power seat control ECU Power seat control ECU branch wire or connector

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.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

2.	CHECK FOR OPEN IN CAN BUS WIRE (POWER SEAT CONTROL ECU BRANCH WIRE)

(a) Disconnect the X11 power seat control ECU connector.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
X11-5 (CANH) - X11-1 (CANL)	Ignition switch off	54 to 69 Ω

3.	CHECK HARNESS AND CONNECTOR (POWER SEAT CONTROL ECU - BATTERY AND BODY GROUND)

(a) Reconnect the cable from the negative (-) battery terminal.

(b) Disconnect the X10 and X11 power seat control ECU connectors.

Standard Resistance:

Tester Connection	Condition	Specified Condition
X10-1 (GND) - Body ground	Always	Below 1 Ω

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

Standard Voltage: