Dtc C15C6/77 Ig Power Supply Voltage Malfunction

Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200
Variable Gear Ratio Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK STEERING CONTROL ECU (POWER SOURCE CIRCUIT)

RECONFIRM DTC OUTPUT

DTC C15C6/77 IG Power Supply Voltage Malfunction


DESCRIPTION

The steering control ECU monitors the IG power supply voltage.
If the steering control ECU detects a malfunction, it will turn on the master warning light, store DTC C15C6/77, and stop VGRS operation.

DTC Code
DTC Detection Condition
Trouble Area
C15C6/77
The steering control ECU detects that the battery voltage is normal and the IG terminal voltage is below 4 V for 6 seconds.
  1. Harness or connector
  2. Steering control ECU

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Variable Gear Ratio Steering.Variable Gear Ratio Steering System. Dtc C15C6/77 Ig Power Supply Voltage Malfunction


INSPECTION PROCEDURE

HINT:
The fault may be intermittent. Check the harnesses and connectors thoroughly and retest.
1.CHECK STEERING CONTROL ECU (POWER SOURCE CIRCUIT)

  1. Record and clear the DTCs (Click here).



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Variable Gear Ratio Steering.Variable Gear Ratio Steering System. Dtc C15C6/77 Ig Power Supply Voltage Malfunction

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E77-7 (PGND) - Body ground
    		Always
    		Below 1 Ω
    E78-8 (PGD2) - Body ground
    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E77-3 (IG) - Body ground
    		Engine switch on (IG)
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.RECONFIRM DTC OUTPUT

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    C15C6/77 is not output
    		A
    C15C6/77 is output (for LHD)
    		B
    C15C6/77 is output (for RHD)
    		C


B
REPLACE STEERING CONTROL ECU (Click here)

C
REPLACE STEERING CONTROL ECU (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)