DI?156
DIAGNOSTICS

?

VARIABLE GEAR RATIO STEERING
DIASM?01

DTC

C1568 / 68

Lock Holder Deviation Detection

CIRCUIT DESCRIPTION
The VGRS actuator contains a lock mechanism that mechanically locks the DC motor so the motor will not
rotate if a failure occurs or when the engine is not running. The VGRS ECU supplies current to the lock solenoid to release the lock lever for VGRS operation.
When the VGRS ECU detects a malfunction in the lock holder, it turns the warning light on and records the
DTC.
DTC No.

DTC Detecting Condition

Trouble Area

C1568/68

The system detects a malfunction in the actuator lock system.

S VGRS actuator

INSPECTION PROCEDURE
HINT:
Determine the trouble area by checking the motor revolution angle sensor signal with hand?held tester.
When not using hand?held tester, go to step 2.

1

Observe the data for MTR REV ANG U, V, W on the hand?held tester.

PREPARATION:
(a) Connect the hand?held tester to DLC3.
(b) Turn the ignition switch ON. (Engine stop)
(c) Turn the steering wheel to the right and left.
(d) Using the hand?held tester, display the data list.
CHECK:
Check the motor revolution angle sensor signal when slowly turning the steering wheel referring to the data
list.
OK:
A, B or C as shown below
A

B

C

turn to left

turn to right

turn to left

turn to right

turn to left

turn to right

MTR REV ANG U

High

High

High

High

High

High

MTR REV ANG V

Low

Low

Low

Low

High

Low

MTR REV ANG W

Low

Low

Low

High

Low

Low

NG

OK

Perform VGRS system calibration
(See page DI?100).

LAND CRUISER (W/G) SUP (RM1072E)

Replace VGRS actuator.

DI?157
DIAGNOSTICS

2

?

VARIABLE GEAR RATIO STEERING

Check the voltage motor revolution angle sensor signal.

MSU

Connector ”A”

MSV

PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals in the VGRS ECU while
slowly turning the steering wheel.

MSW

MG

F17325

OK:
A, B or C as shown below
A

B

C

turn to left

turn to right

turn to left

turn to right

turn to left

turn to right

MSU (A4) ? MG
(A7)

Above 3.5 V

Above 3.5 V

Above 3.5 V

Above 3.5 V

Above 3.5 V

Above 3.5 V

MSV (A8) ? MG
(A7)

Below 1 V

Below 1 V

Below 1 V

Below 1 V

Above 3.5 V

Below 1 V

MSW (A2) ? MG
(A7)

Below 1 V

Below 1 V

Below 1 V

Above 3.5 V

Below 1 V

Below 1 V

NG

OK

PerformVGRS system calibration
(See page DI?100).

LAND CRUISER (W/G) SUP (RM1072E)

Replace VGRS actuator.