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:

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE FRONT SUPPORT TO FRONT SHOCK ABSORBER NUT (a) Secure SST in a vise. SST: 09727-30021 09727-00010 09727-00031 SST: 09727-00060 (b) Attach the ar ...

Air Outlet Damper Control Servo Motor Circuit (B1443/43)
DESCRIPTION The damper servo sub-assembly (mode damper servo) sends pulse signals to inform the No. 1 air conditioning amplifier assembly of the damper position. The No. 1 air conditioning amplifier assembly activates the motor (normal or reverse) based ...