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

Toyota Tacoma 2015-2018 Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Vacuum Brake Booster) / Steering Angle Sensor Power Source Voltage Malfunction (C1432)

DESCRIPTION

The skid control ECU (brake actuator assembly) outputs this DTC when it receives a sensor power source malfunction signal from the steering angle sensor.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1432	Steering Angle Sensor Power Source Voltage Malfunction	Steering angle sensor power supply malfunction signal is received from steering angle sensor.	ECU-B NO. 2 fuse ECU-IG NO. 3 fuse Steering angle sensor (Spiral cable with sensor sub-assembly) Wire harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Do not remove the steering angle sensor from the spiral cable with sensor sub-assembly.
When replacing the steering angle sensor (spiral cable with sensor sub-assembly), confirm that the replacement part is of the correct specification.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT:

When U0073, U0124 and/or U0126 is output together with C1432, inspect and repair the trouble areas indicated by U0073, U0124 and/or U0126 first (See page ).
When the speed sensor or the yaw rate sensor (airbag sensor assembly) has trouble, DTCs for the steering angle sensor (spiral cable with sensor sub-assembly) may be output even when the steering angle sensor is normal. When DTCs for the speed sensor or yaw rate 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 sensor (airbag sensor assembly) first, and then inspect and repair the steering angle sensor (spiral cable with sensor sub-assembly).

PROCEDURE

1.	CHECK TERMINAL VOLTAGE (BAT TERMINAL)

(a) Turn the ignition switch off.

(b) Remove the steering wheel and the column cover lower (See page ).

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
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])

REPAIR OR REPLACE HARNESS OR CONNECTOR (BAT CIRCUIT)

2.	CHECK TERMINAL VOLTAGE (IG TERMINAL)

(a) Turn the ignition switch to ON.

(b) 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

Text in Illustration

*a	Front view of wire harness connector (to Steering Angle Sensor [Spiral Cable with Sensor Sub-assembly])

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

3.	CHECK HARNESS AND CONNECTOR (ESS TERMINAL)

(a) Turn the ignition switch off.

(b) 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])

HINT:

If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (See page ).

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (ESS CIRCUIT)

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