VARIABLE GEAR RATIO STEERING: VARIABLE GEAR RATIO STEERING SYSTEM: DESCRIPTION (2008 LX570)

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Last Modified: 11-27-2007		1.6 C
Service Category: Steering	Section: Steering Column
Model Year: 2008	Model: LX570	Doc ID: RM000000YUB00KX
Title: VARIABLE GEAR RATIO STEERING: VARIABLE GEAR RATIO STEERING SYSTEM: DESCRIPTION (2008 LX570)

DTC

C15C1/74

Steering Angle Sensor Malfunction

DTC

C15C2/74

Steering Angle Sensor B+ Malfunction

DESCRIPTION

The steering control ECU detects a steering angle sensor malfunction by receiving an error signal from the steering angle sensor via CAN communication. If the steering control ECU detects this error signal, it will turn the master warning light on, store these DTCs, and stop VGRS operation.

DTC Code	DTC Detection Condition	Trouble Area
C15C1/74	The steering control ECU receives a steering angle sensor malfunction signal via CAN communication.	Steering angle sensor Harness or connector CAN communication system Steering control ECU
C15C2/74	The steering control ECU receives a B+ open circuit signal from the steering angle sensor via CAN communication.	Steering angle sensor Harness or connector CAN communication system Steering control ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.	CHECK DTC (CAN COMMUNICATION SYSTEM)

(a) Using the Techstream, check if the CAN communication system is functioning normally .

Result

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

2.	CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU +B1 TERMINAL VOLTAGE)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
E82-10 (+B1) - Body ground	Always	11 to 14 V

3.	CHECK STEERING CONTROL ECU (+BO TERMINAL VOLTAGE)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
E84-1 (+BO) - Body ground	Always	11 to 14 V

4.	CHECK HARNESS AND CONNECTOR (STEERING ANGLE SENSOR)

(a) Disconnect the E11 steering angle sensor connector.

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

Standard Voltage:

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

Standard Resistance:

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

5.	CHECK STEERING ANGLE SENSOR

(a) Disconnect the E11 steering angle sensor connector.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
E11-3 (BAT) - E11-2 (ESS)	Engine switch on (IG)	11 to 14 V