Last Modified: 4-30-2014 6.6 C Doc ID: RM000001CFG002X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1225/25-C1228/28; BA and TRAC Solenoid Circuit; 2006 MY LX470 [05/2005 -        ]

DTC

C1225/25

BA and TRAC Solenoid Circuit

DTC

C1226/26

BA and TRAC Solenoid Circuit

DTC

C1227/27

BA and TRAC Solenoid Circuit

DTC

C1228/28

STR Solenoid Circuit

DESCRIPTION

The TRAC & VSC solenoid operates in accordance with signals from the ECU, raises the fluid pressure and releases it from the brake cylinders.

DTC No.

DTC Detection Condition

Trouble Area

C1225/25

Open or short in SA1 circuit continues for 0.015 sec. or more.
  • Hydraulic brake booster
  • SA1 circuit

C1226/26

Open or short in SA2 circuit continues for 0.015 sec. or more.
  • Hydraulic brake booster
  • SA2 circuit

C1227/27

Open or short in SA3 circuit continues for 0.015 sec. or more.
  • Hydraulic brake booster
  • SA3 circuit

C1228/28

Open or short in STR circuit continues for 0.015 sec. or more.
  • Hydraulic brake booster
  • STR circuit

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

INSPECT BRAKE ACTUATOR

(a) Disconnect the A43 and A45 actuator connectors.

(b) Measure the resistance of the actuator.

Standard resistance:

Tester Connection

Specified Condition

A43-4 (BS) - A45-5 (SA3)

6.95 to 7.45 Ω

A43-4 (BS) - A45-6 (STR)

4.05 to 4.55 Ω

A43-4 (BS) - A45-11 (SA2)

4.05 to 4.55 Ω

A43-4 (BS) - A45-12 (SA1)

4.05 to 4.55 Ω

HINT:

Resistance of each solenoid at 20°C (68°F).
NG

REPLACE BRAKE ACTUATOR

OK

2.

CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - BRAKE ACTUATOR)
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

CHECK EACH CONNECTION IF SAME CODE IS STILL OUTPUT AFTER DTC DELETION (IF CONNECTION IS NORMAL, SKID CONTROL ECU MAY BE DEFECTIVE)