Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Steering Angle Sensor Unusual Bank Angle Detected (C1440)

DESCRIPTION

If the skid control ECU (master cylinder solenoid) determines that the vehicle is being driven at a steep bank angle, the skid control ECU (master cylinder solenoid) 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 (airbag sensor assembly) DTC are stored when the skid control ECU (master cylinder solenoid) 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 (airbag sensor assembly) is installed at an angle.
  • The yaw rate and acceleration sensor (airbag sensor assembly) signal output is stuck.

DTC Code

DTC Detection Condition

Trouble Area

C1440

Driving at a steep bank angle.

Yaw rate and acceleration sensor (airbag sensor assembly)

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs (See page ). (b) Perform a road test. ).

(b) Perform a road test.

(c) Check if the same DTC is output (See page ). Result ).

Result

Result

Proceed to

DTC C1440 is output

A

DTC C1440 is not output

B

Yaw rate and acceleration sensor DTC is output

C

B

END

C

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

A

2.

CHECK DTC

(a) Clear the DTCs (See page ). ).

HINT:

  • If the skid control ECU (master cylinder solenoid) determines that the vehicle is being driven at a steep bank angle, the skid control ECU (master cylinder solenoid) 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.
NEXT

END

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Other materials:

Reassembly
REASSEMBLY CAUTION / NOTICE / HINT NOTICE: When installing, coat the parts indicated by the arrows with power steering fluid (See page ). PROCEDURE 1. INSTALL VANE PUMP HOUSING OIL SEAL (a) Coat a new vane pump housing oil seal lip with power steering fluid. (b) Using SST and a press, in ...

Removal
REMOVAL PROCEDURE 1. PRECAUTION NOTICE: After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before pr ...

Road Test
ROAD TEST 1. PROBLEM SYMPTOM CONFIRMATION (a) Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transmission does not shift up or down, or that the shift point is too high or too low, conduct the following road test referring to t ...

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