BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1432; Steering Angle Sensor Power Source Voltage Malfunction; 2018 - 2020 MY Sienna [11/2017

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM1000000018KEW
Model Year Start: 2018	Model: Sienna	Prod Date Range: [11/2017 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1432; Steering Angle Sensor Power Source Voltage Malfunction; 2018 - 2020 MY Sienna [11/2017 - ]

DTC

C1432

Steering Angle Sensor Power Source Voltage Malfunction

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 (spiral cable with sensor sub-assembly).

DTC No.	DTC Detection Condition	Trouble Area
C1432	Steering angle sensor power supply malfunction signal is received from steering angle sensor.	Wire harness or connector Steering angle sensor (Spiral Cable with Sensor Sub-assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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 (spiral cable with sensor sub-assembly) 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 HARNESS AND CONNECTOR (BAT TERMINAL)

(a) Remove the steering wheel and the column cover.

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

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
D22-5 (IG) - Body ground	Ignition switch ON	11 to 14 V
D22-6 (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 (POWER SOURCE CIRCUIT)

2.	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.

NOTICE:

Before measuring the resistance of the steering angle sensor (spiral cable with sensor sub-assembly), turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
D22-2 (ESS) - Body ground	1 minute after ignition switch off	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 Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts (See page ).

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

REPAIR OR REPLACE HARNESS OR CONNECTOR (ESS CIRCUIT)