DTC C15A1/61 Actuator Malfunction

DESCRIPTION

The steering control ECU drives the actuator while the steering wheel is turned to set the gear ratio. It detects the current flowing into the actuator motor driving circuit.

If the steering control ECU detects excessive current, it will store DTC C15A1/61, turn on the master warning light, and stop VGRS operation.

DTC Code	DTC Detection Condition	Trouble Area
C15A1/61	Excessive current (exceeding the estimated amount) flows due to a malfunction in the motor drive circuit.	Harness or connector Steering actuator Steering control ECU

WIRING DIAGRAM

Dtc C15A1/61 Actuator Malfunction. VARIABLE GEAR RATIO STEERING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

HINT:

When DTC C15A2/62 is output, a short circuit inside the steering actuator or inside the steering control ECU is suspected.

1.CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ACTUATOR)

Dtc C15A1/61 Actuator Malfunction. VARIABLE GEAR RATIO STEERING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E78 steering control ECU connector.

Disconnect the E80 steering actuator connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E78-1 (BMV) - E78-2 (BMU)	Always	10 kΩ or higher
E78-1 (BMV) - E78-3 (BMW)
E78-2 (BMU) - E78-3 (BMW)
E78-1 (BMV) - E80-5 (BMV+)	Always	Below 1 Ω
E78-2 (BMU) - E80-4 (BMU+)
E78-3 (BMW) - E80-13 (BMW+)
E78-1 (BMV) - Body ground	Always	10 kΩ or higher
E78-2 (BMU) - Body ground
E78-3 (BMW) - Body ground

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.CHECK STEERING ACTUATOR

Dtc C15A1/61 Actuator Malfunction. VARIABLE GEAR RATIO STEERING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E78 steering control ECU connector.

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

HINT:

The resistance must be measured with the steering actuator connector connected.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E78-1 (BMV) - E78-2 (BMU)	Always	Below 1 Ω
E78-1 (BMV) - E78-3 (BMW)
E78-2 (BMU) - E78-3 (BMW)
E78-1 (BMV) - Body ground	Always	10 kΩ or higher
E78-2 (BMU) - Body ground
E78-3 (BMW) - Body ground

Result
Result Result	Proceed to
NG	A
OK (for LHD)	B
OK (for RHD)	C

B

REPLACE STEERING CONTROL ECU ()

C

REPLACE STEERING CONTROL ECU ()

A

REPLACE STEERING ACTUATOR ASSEMBLY ()

VARIABLE GEAR RATIO STEERING

Land Cruiser URJ200 URJ202 GRJ200 VDJ200

VARIABLE GEAR RATIO STEERING SYSTEM