Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Steering Angle Sensor Power Source Voltage Malfunction (C1432)

DESCRIPTION

Steering angle sensor (spiral cable with sensor sub-assembly) signals are sent to the skid control ECU (master cylinder solenoid) via the CAN communication system. When there is a malfunction in the CAN communication system, it is detected by the steering angle sensor zero point malfunction diagnostic function.

DTC Code

DTC Detection Condition

Trouble Area

C1432

A steering angle sensor power supply malfunction signal is received from the steering angle sensor.

  • ECU-B NO. 2 fuse
  • ECU-IG NO. 3 fuse
  • Steering angle sensor (spiral cable with sensor sub-assembly) power supply
  • Steering angle sensor (spiral cable with sensor sub-assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT:

  • When the speed sensor or the yaw rate and acceleration sensor (airbag sensor assembly) has trouble, DTCs for the steering angle sensor (spiral cable with sensor sub-assembly) may be stored even when the steering angle sensor (spiral cable with sensor sub-assembly) is normal. When DTCs for the speed sensor or yaw rate and acceleration sensor (airbag sensor assembly) are output together with DTCs for the steering angle sensor (spiral cable with sensor sub-assembly), inspect and repair the speed sensor and yaw rate and acceleration sensor (airbag sensor assembly) first, and then inspect and repair the steering angle sensor (spiral cable with sensor sub-assembly).

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs (See page ). Result ).

Result

Result

Proceed to

CAN DTC is not output

A

CAN DTC is output

B

B

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

A

2.

CHECK HARNESS AND CONNECTOR (IG, BAT TERMINAL)

(a) Make sure that there is no looseness in the locking part and connecting part of the connectors.

(b) Disconnect the S32 steering angle sensor (spiral cable with sensor sub-assembly) connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

S32-4 (IG) - Body ground

Ignition switch ON

11 to 14 V

S32-5 (BAT) - Body ground

Always

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

OK

3.

CHECK HARNESS AND CONNECTOR (ESS TERMINAL)

(a) Turn the ignition switch off.

(b) Disconnect the S32 steering angle sensor (spiral cable with sensor sub-assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

S32-1 (ESS) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly))

OK

REPLACE STEERING ANGLE SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

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