Last Modified: 11-29-2007 1.6 C
Service Category: Brake Section: Brake Control/Dynamic Control System
Model Year: 2008 Model: Sequoia Doc ID: RM000000OSD00XX
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 Sequoia)

DTC

C1241/41

Low Battery Positive Voltage or Abnormally High Battery Positive Voltage

DESCRIPTION

When there is an abnormality in the power supply circuit of the VSC actuator (skid control ECU), the skid control ECU sets a DTC and the operation is prohibited by the fail-safe function. This DTC is set when the voltage supplied to terminal +BS is outside the DTC detection threshold due to abnormalities of the battery, power source circuits or charging circuits such as the alternator circuit.

The fail-safe function is canceled when the voltage to terminal +BS returns to normal.

HINT:

If the vehicle speed is 20 km/h (12 mph) or less when the battery voltage is low, the ABS warning light, VSC OFF indicator light and SLIP indicator light illuminate. However, a DTC will not be output.

DTC Code

DTC Detection Condition

Trouble Area

C1241/41

When any of following conditions detected:

  1. +BS terminal voltage 18 V or more (momentary occurrence included).
  2. At vehicle speed 20 km/h (12 mph) or more, +BS terminal voltage 9.7 V or less for 0.21 seconds or more.
  3. At vehicle speed 20 km/h (12 mph) or more, +BS terminal voltage 8.5 V or less (momentary occurrence included).
  • Battery
  • Charging system
  • Power source circuit
  • VSC actuator (skid control ECU)

WIRING DIAGRAM

Refer to DTC C0278/11 BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 Sequoia)+ .

INSPECTION PROCEDURE

NOTICE:

When replacing the VSC actuator assembly, perform zero point calibration BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION (2008 Sequoia) .

PROCEDURE

1.

INSPECT BATTERY

(a) Check the battery voltage.

Standard voltage:

11 to 14 V

Result

Result

Proceed to

OK

A

NG (for 2UZ-FE)

B

NG (for 3UR-FE)

C
A

2.

INSPECT FUSE (ABS2)

(a) Remove the ABS2 fuse from the engine room relay block.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

ABS2 fuse

Always

Below 1 Ω
OK

3.

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BATTERY AND BODY GROUND)

(a) Disconnect the A19 ECU connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A19-47 (+BS) - Body ground

Always

11 to 14 V

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A19-1 (GND1) - Body ground

Always

Below 1 Ω
OK

4.

RECONFIRM DTC

(a) Clear the DTCs BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR (2008 Sequoia) .

(b) Start the engine.

(c) Check if the same DTCs are output BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR (2008 Sequoia) .

Result

Result

Proceed to

DTC is output

A

DTC is not output

B
A