BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1241/41; Low Battery Positive Voltage or Abnormally High Battery Positive Voltage; 2007 MY LX470 [08/2006

Last Modified: 7-3-2017	6.8:8.0.40	Doc ID: RM000001A66007X
Model Year Start: 2007	Model: LX470	Prod Date Range: [08/2006 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1241/41; Low Battery Positive Voltage or Abnormally High Battery Positive Voltage; 2007 MY LX470 [08/2006 - ]

DTC

C1241/41

Low Battery Positive Voltage or Abnormally High Battery Positive Voltage

DESCRIPTION

DTC No.	DTC Detection Condition	Trouble Area
C1241/41	Detection of any of the conditions 1. through 4.: Vehicle speed is 19 mph (3 km/h) or more and voltage of ECU terminal IG remains below 9.5 V for more than 10 sec. While the condition that the solenoid relay is ON continues, ECU terminal IG1 voltage becomes 9.5 V or less, and the condition that the contact point of the solenoid relay is OFF continues for 0.2 sec. or more. The condition that ECU terminal IG1 voltage is more than 17.0 V continues for 1.2 sec. or more. While the solenoid relay outputs ON signal, ECU terminal IG1 voltage becomes more than 17.0 V, and the condition that the contact point of the solenoid relay is OFF continues for 0.2 sec. or more.	Battery Voltage regulator Power source circuit

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.	INSPECT FUSE (ECU-IG1)

(a) Remove the ECU-IG1 fuse from the cowl side junction block LH.

(b) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ω

NG

REPLACE FUSE

OK

2.	INSPECT BATTERY

(a) Check the battery voltage.

Standard voltage:

11 to 14 V

Result

Result	Proceed to
Battery voltage is OK (when using intelligent tester)	A
Battery voltage is OK (when not using intelligent tester)	B
Battery voltage is abnormal	C

B

GO TO STEP 4

C

RECHARGE OR REPLACE BATTERY

A

3.	READ DATA LIST (IG VOLTAGE)

(a) Check the DATA LIST for proper functioning of the IG voltage.

Skid control ECU assembly

Item

Measurement Item / Range (Display)

Normal Condition

Diagnostic Note

IG VOLTAGE

ECU IG power voltage /

UNDER or NORMAL or OVER

-

OK:

Display is NORMAL

OK

REPLACE SKID CONTROL ECU ASSEMBLY

NG

4.	CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - BATTERY AND BODY GROUND)

(a) Measure the voltage of the wire harness side connectors.

Standard voltage:

Tester Connection	Condition	Specified Condition
A40-6 (IG1) - A40-17 (GND4)	Ignition switch ON	10 to 14 V
A40-6 (IG1) - A40-8 (GND3)	Ignition switch ON	10 to 14 V
A40-6 (IG1) - A39-6 (GND2)	Ignition switch ON	10 to 14 V
A40-6 (IG1) - A39-31 (GND1)	Ignition switch ON	10 to 14 V
A40-6 (IG1) - Body ground	Ignition switch ON	10 to 14 V

(b) Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection	Condition	Specified Condition
A40-17 (GND4) - Body ground	Always	Below 1 Ω
A40-8 (GND3) - Body ground	Always	Below 1 Ω
A39-6 (GND2) - Body ground	Always	Below 1 Ω
A39-31 (GND1) - Body ground	Always	Below 1 Ω

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE SKID CONTROL ECU ASSEMBLY