STEERING COLUMN: VARIABLE GEAR RATIO STEERING SYSTEM: C1551/51; IG Power Supply Voltage Malfunction; 2007 MY LX470 [08/2006

Last Modified: 7-3-2017	6.8:8.0.40	Doc ID: RM000001BBP001X
Model Year Start: 2007	Model: LX470	Prod Date Range: [08/2006 - ]
Title: STEERING COLUMN: VARIABLE GEAR RATIO STEERING SYSTEM: C1551/51; IG Power Supply Voltage Malfunction; 2007 MY LX470 [08/2006 - ]

DTC

C1551/51

IG Power Supply Voltage Malfunction

DESCRIPTION

The VGRS ECU monitors IG power supply voltage. If the ECU detects a malfunction, it turns on the warning light, records the DTC, and stops VGRS operation.

DTC No.	DTC Detection Condition	Trouble Area
C1551/51	The system checks that the battery voltage is normal and the IG terminal voltage is less than 9 V for 6 sec.	ECU-IG1 fuse IG circuit Charging system VGRS ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.	CHECK VOLTAGE BETWEEN TERMINALS IG AND GND OF VGRS ECU CONNECTOR

(a) Record and clear VGRS DTCs.

(b) Start the engine and measure the voltage between terminals V11-3 (IG) and V11-6 (GND) of the VGRS ECU.

Result	Proceed to
9 to 16 V	A
Below 9 V	B
Above 16 V	C

CHECK OR REPAIR HARNESS AND ECU-IG1 FUSE

CHECK AND REPAIR CHARGING SYSTEM

2.	CHECK VGRS FOR DTC C1551/51

(a) Is DTC C1551/51 present?

NOTICE:

Fault may be intermittent. Check harness and connectors carefully and retest.

YES

REPLACE VGRS ECU

NO FAULT DETECTED