Toyota 4Runner: Steering Angle Sensor Unusual Bank Angle Detected (C1440)

Toyota 4Runner Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Steering Angle Sensor Unusual Bank Angle Detected (C1440)

DESCRIPTION

If the skid control ECU determines that the vehicle is being driven at a steep bank angle, the skid control ECU stores DTC C1440 while VSC operation is temporarily disabled.

It is not a malfunction if the system and sensor circuits are normal and if the normal VSC operation resumes, which automatically clears DTC C1440, after the vehicle is returned to a normal position.

HINT:

DTC C1440 and the yaw rate and acceleration sensor DTC are stored when the skid control ECU determines that the vehicle is being driven at a steep bank angle and either of the following conditions is met:

The yaw rate and acceleration sensor is installed at an angle.
The yaw rate and acceleration sensor signal output is stuck.

DTC Code	DTC Detection Condition	Trouble Area
C1440	Driving at a steep bank angle.	Yaw rate and acceleration sensor

PROCEDURE

CHECK DTC

(a) Clear the DTCs (See page ).

(b) Perform a road test.

Result

Result	Proceed to
DTC C1440 is output	A
DTC C1440 is not output	B
Yaw rate and acceleration sensor DTC is output	C

END

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

CLEAR DTC

(a) Clear the DTCs (See page ).

HINT:

If the skid control ECU determines that the vehicle is being driven at a steep bank angle, the skid control ECU stores DTC C1440 while VSC operation is temporarily disabled.
It is not a malfunction if the system and sensor circuits are normal and if the normal VSC operation resumes, which automatically clears DTC C1440, after the vehicle is returned to a normal position.

END

Steering Angle Sensor Initialization Incomplete (C1439,C1445)

DESCRIPTION The skid control ECU acquires steering angle sensor zero point every time the ignition switch is turned to ON and the vehicle is driven at 40 km/h (25 mph) or more for approximately 1 ...

Invalid Data Received from Deceleration Sensor (C1442,C1443)

DESCRIPTION The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system. DTC Code DTC Detection Condition Trou ...

Other materials about Toyota 4Runner:

Inspection
INSPECTION PROCEDURE 1. INSPECT TRANSFER INPUT SHAFT (a) Using a micrometer, measure the diameter of the input shaft journal. Minimum diameter: 47.59 mm (1.88 in.) If the diameter is less than the minimum, replace the input shaft. (b) Usin ...

Disabling the TRAC/VSC systems (2WD models)
If the vehicle gets stuck in fresh snow or mud, the TRAC/VSC systems may reduce power from the engine to the wheels. You may need to turn the system off to enable you to rock the vehicle in order to free it. Turning off the TRAC system only (turning on th ...