NETWORKING: CAN COMMUNICATION SYSTEM: DESCRIPTION (2008 LX570)

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Last Modified: 11-27-2007		1.6 C
Service Category: Power Source/Network	Section: Networking
Model Year: 2008	Model: LX570	Doc ID: RM000002N2B00CX
Title: NETWORKING: CAN COMMUNICATION SYSTEM: DESCRIPTION (2008 LX570)

DTC

U0126

Lost Communication with Steering Angle Sensor Module

DESCRIPTION

If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (One side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).

DTC Code	DTC Detection Condition	Trouble Area
U0126	There is no communication from the steering angle sensor.	Power source circuit of steering angle sensor One side of CAN branch wire of other systems Steering angle sensor Steering angle sensor branch wire or connector

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

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.

NOTICE:

w/ Navigation System:

After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.

When disconnecting the cable, some systems need to be initialized after the cable is reconnected .

2.	CHECK FOR OPEN IN CAN BUS WIRE (STEERING ANGLE SENSOR BRANCH WIRE)

(a) Disconnect the E11 steering angle sensor connector.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
E11-10 (CANH) - E11-9 (CANL)	Engine switch off	54 to 69 Ω

3.	CHECK HARNESS AND CONNECTOR (STEERING ANGLE SENSOR - BATTERY AND BODY GROUND)

(a) Connect the cable to the negative (-) battery terminal.

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected .

(b) Disconnect the E11 steering angle sensor connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E11-2 (ESS) - Body ground	Always	Below 1 Ω

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
E11-3 (BAT) - Body ground	Always	11 to 14 V
E11-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V