DTC    C15C6/77    IG Power Supply Voltage Malfunction

for Preparation Click here


DESCRIPTION

The steering control ECU monitors 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 No.
DTC Detecting Condition
Trouble Area
C15C6/77
The steering control ECU detects that the battery voltage is normal and the IG terminal voltage is less than 4 V for 6 seconds.
  1. ECU-IG LH fuse
  2. IG circuit
  3. Charging system
  4. Steering control ECU

WIRING DIAGRAM


C111968E01


INSPECTION PROCEDURE

CAUTION:
The fault may be intermittent. Check harnesses and connectors thoroughly and retest.

1.CHECK STEERING CONTROL ECU


    C107435E05

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

  1. Start the engine.

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

    Voltage:
    Tester connection
    		Specified condition
    		Proceed to
    A42-3 (IG) -
    A42-7 (PGND)
    		9 to 16 V
    		A
    A42-3 (IG) -
    A42-7 (PGND)
    		Below 9 V
    		B
    A42-3 (IG) -
    A42-7 (PGND)
    		Above 16 V
    		C



B
CHECK OR REPAIR HARNESS AND FUSE

C
CHECK AND REPAIR CHARGING SYSTEM
A


2.CHECK DTC

  1. Turn the engine switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the intelligent tester on.

  1. Check for DTCs (Click here).

    OK:
    DTC C15C6/77 is not output.



NG
REPLACE STEERING CONTROL ECU
OK

END