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: RM000002SW600CX
Title: NETWORKING: CAN COMMUNICATION SYSTEM: DESCRIPTION (2008 LX570)

DTC

U0123

Lost Communication with Yaw Rate Sensor Module

DTC

U0124

Lost Communication with Lateral Acceleration Sensor Module

DESCRIPTION

DTC Code	DTC Detection Condition	Trouble Area
U0123	There is no communication from the yaw rate sensor.	Power source circuit of yaw rate sensor assembly Yaw rate sensor assembly Yaw rate sensor branch wire or connector
U0124	There is no communication from the yaw rate sensor (lateral acceleration sensor).	Power source circuit of yaw rate sensor assembly Yaw rate sensor assembly Yaw rate 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 (YAW RATE SENSOR BRANCH WIRE)

(a) Disconnect the E50 yaw rate sensor connector.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
E50-3 (CANH) - E50-2 (CANL)	Engine switch off	54 to 69 Ω

3.	CHECK HARNESS AND CONNECTOR (YAW RATE 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 E50 yaw rate sensor connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E50-1 (GND) - Body ground	Always	Below 1 Ω

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
E50-4 (IG) - Body ground	Engine switch on (IG)	11 to 14 V