BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1249/49; Open in Stop Light Switch Circuit; 2007 MY LX470 [08/2006

Last Modified: 7-3-2017	6.8:8.0.40	Doc ID: RM000001A69007X
Model Year Start: 2007	Model: LX470	Prod Date Range: [08/2006 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1249/49; Open in Stop Light Switch Circuit; 2007 MY LX470 [08/2006 - ]

DTC

C1249/49

Open in Stop Light Switch Circuit

DESCRIPTION

DTC No.	DTC Detection Condition	Trouble Area
C1249/49	ECU terminal IG1 voltage is 9.5 to 17.2 V, ABS is in non-operation, and an open in stop light switch circuit continues for 0.3 sec. or more.	Stop light bulb Stop light switch circuit

1.	CHECK STOP LIGHT SWITCH OPERATION

(a) Check that the stop light turns on when the brake pedal is depressed and turns off when the brake pedal is released.

Condition	Stop Light Condition
Brake pedal depressed	Turns on
Brake pedal released	Turns off

2.	CHECK STOP LIGHT CIRCUIT

CHECK STOP LIGHT BULB AND REPAIR OR REPLACE STOP LIGHT CIRCUIT

3.	CHECK SKID CONTROL ECU ASSEMBLY

(a) Remove the skid control ECU with the connectors still connected.

(b) Measure the voltage between terminal STP of the skid control ECU and body ground when the brake pedal is depressed.

OK:

Standard voltage

10 to 14 V

END

4.	CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - STOP LIGHT SWITCH)

REPAIR OR REPLACE HARNESS AND CONNECTOR

REPLACE SKID CONTROL ECU ASSEMBLY