Last Modified: 4-30-2014 6.6 C Doc ID: RM000001BBG000X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: STEERING COLUMN: VARIABLE GEAR RATIO STEERING SYSTEM: C1511/11; Torque Sensor 1 Malfunction; 2006 MY LX470 [05/2005 -        ]

DTC

C1511/11

Torque Sensor 1 Malfunction

DESCRIPTION

The VGRS ECU receives the steering sensor signals (SS1, SS2, SS3), and judges the steering condition to drive the VGRS actuator.

When the steering sensor signal is abnormal, the VGRS ECU records the DTC and illuminates the VGRS warning light.

DTC No.

DTC Detection Condition

Trouble Area

C1511/11

The system detects a momentary interruption of the steering angle sensor signal (SS1, SS2, SS3) 10 times, or an open circuit for more than 0.12 sec.
  • Steering angle sensor
  • Steering angle sensor circuit
  • VGRS ECU
  • Skid control ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

  • Determine the trouble area by checking the steering sensor signal using the intelligent tester.
  • When not using the intelligent tester, go to *.

PROCEDURE

1.

READ VALUE USING INTELLIGENT TESTER

(a) Connect the intelligent tester (with CAN VIM) to the DLC3.

(b) Start the engine.

(c) Using the intelligent tester, display the DATA LIST.

(d) Check each steering sensor signal (SS1, SS2, SS3) while slowly turning the steering wheel.

OK:

STR SENS1: High or Low

STR SENS2: High or Low

STR SENS3: High or Low

Result

Result

Proceed to

All OK

A

All NG

B

Other

C
A

REPLACE VGRS ECU

C

GO TO STEP 3

B

2.

INSPECT POWER SUPPLY VOLTAGE OF STEERING ANGLE SENSOR

HINT:

  • When a malfunction is found in the power supply voltage of the steering angle sensor, the sensor outputs become abnormal.
  • The power supply has 2 systems, IG and BAT.

(a) Turn the ignition switch OFF.

(b) Disconnect the C36 steering angle sensor connector.

(c) Turn the ignition switch ON.

(d) Measure the voltage between terminals C36-1 (IG) and C36-2 (ESS) of the steering angle sensor harness side connector.

(e) Measure the voltage between terminals C36-9 (BAT) and C36-2 (ESS) of the steering angle sensor harness side connector.

Standard voltage:

10 to 14 V

Result

Result

Proceed to

OK

A

NG (IG power supply terminals 1 and 2)

B

NG (BAT power supply terminals 9 and 2)

C
B

REPAIR OR REPLACE HARNESS AND CONNECTOR

C

GO TO STEP 4

A

3.

INSPECT OUTPUT OF STEERING ANGLE SENSOR *

HINT:

Check the output when slowly turning the steering wheel to judge whether or not the sensor is normal.

(a) Turn the ignition switch OFF.

(b) Disconnect the V11 VGRS ECU connector.

(c) Turn the ignition switch ON.

(d) When slowly turning the steering wheel, measure the resistance between terminals of the C36 steering angle sensor connector.

Standard resistance:

Tester Connection

Specified Condition

C36-6 (SS1) - C36-2 (ESS)

Below 1 kΩ or above 100 kΩ

C36-14 (SS2) - C36-2 (ESS)

C36-7 (SS3) - C36-2 (ESS)
OK

GO TO STEP 8

NG

REPLACE STEERING ANGLE SENSOR

4.

CHECK VOLTAGE BETWEEN TERMINALS +BO AND GND OF VGRS ECU

(a) Turn the ignition switch ON.

(b) Measure the voltage between terminals V11-13 (+BO) and V11-6 (GND) of the V11 VGRS ECU.

Standard voltage:

10 to 14 V
OK

REPAIR OR REPLACE HARNESS AND CONNECTOR (STEERING ANGLE SENSOR - VGRS ECU)

NG

5.

CHECK VOLTAGE BETWEEN TERMINALS +BI AND GND OF VGRS ECU

(a) Turn the ignition switch ON.

(b) Measure the voltage between terminals V11-2 (+BI) and V11-6 (GND) of the VGRS ECU.

Standard voltage:

10 to 14 V
OK

REPLACE VGRS ECU

NG

6.

CHECK VOLTAGE BETWEEN TERMINALS +BO AND GND OF SKID CONTROL ECU

(a) Turn the ignition switch ON.

(b) Measure the voltage between terminals A42-21 (+BO) and A39-31 (GND1) of the skid control ECU.

Standard voltage:

10 to 14 V
OK

REPAIR OR REPLACE HARNESS AND CONNECTOR (SKID CONTROL ECU - VGRS ECU)

NG

7.

CHECK VOLTAGE BETWEEN TERMINALS +BI AND GND OF SKID CONTROL ECU

(a) Turn the ignition switch ON.

(b) Measure the voltage between terminals A42-15 (+BI) and A39-31 (GND1) of the skid control ECU.

Standard voltage:

10 to 14 V
OK

REPLACE SKID CONTROL ECU

NG

REPAIR OR REPLACE +BI CIRCUIT

8.

CHECK WIRE HARNESS (STEERING ANGLE SENSOR - VGRS ECU)

(a) Turn the ignition switch OFF.

(b) Disconnect the C36 steering angle sensor connector and V11 VGRS ECU connector.

(c) Check the continuity between each of terminal C36-6 (SS1) - V11-4, C36-14 (SS2) - V11-15 and C36-7 (SS3) - V11-5 of the steering angle sensor connector and the VGRS ECU connectors.

OK:

Continuity

(d) Check the continuity between each of terminal V11-4 (SS1), V11-5 (SS2) and V11-5 (SS3) of the VGRS ECU connector and body ground.

OK:

No Continuity

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE VGRS ECU