Toyota Tacoma (2015-2018) Service Manual: Steering Angle Sensor (C1A47)
DESCRIPTION
The millimeter wave radar sensor assembly receives steering angle information from the steering angle sensor (spiral cable with sensor sub-assembly). If the millimeter wave radar sensor assembly detects a steering angle sensor (spiral cable with sensor sub-assembly) malfunction, DTC C1A47 will be stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1A47 |
Steering Angle Sensor |
While the vehicle is being driven at a speed of 50 km/h (32 mph) or more, the millimeter wave radar sensor assembly receives a steering angle sensor (spiral cable with sensor sub-assembly) malfunction signal continuously for 1 second or more. |
|
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle. As a result, a DTC may be stored.
- If the millimeter wave radar sensor assembly has been replaced, be sure
to perform millimeter wave radar sensor assembly adjustment.
Click here
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- The pre-collision system uses the CAN communication system. First, confirm
that there are no malfunctions in the CAN communication system. Refer to
How to Proceed with Troubleshooting.
Click here
PROCEDURE
|
1. |
CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) |
HINT:
Pre-collision system DTC C1A47 may be stored due to a malfunction in the vehicle stability control system. Therefore, it is necessary to check for and troubleshoot vehicle stability control system DTCs first.
(a) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
Vehicle stability control system DTCs are not output |
A |
|
Vehicle stability control system DTCs are output |
B |
| B | .gif) |
GO TO VEHICLE STABILITY CONTROL SYSTEM |
|
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|
2. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC C1A47 is not output |
A |
|
DTC C1A47 is output |
B |
| A | |
USE SIMULATION METHOD TO CHECK |
| B | |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
Stop Light Relay Circuit (C1A4B)
DESCRIPTION
The skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake
actuator assembly)*2 sends a stop light operation request signal to the stop light
relay (stop light switc ...
Front Radar Sensor Incorrect Axial Gap (C1A11)
DESCRIPTION
When the vehicle is determined to be driving in a straight line or on a gradual
curve based on signals from the yaw rate sensor, etc., the millimeter wave radar
sensor assembly perfor ...
Other materials:
Open in Front Floor Electrical Key Oscillator Circuit (B27A5)
DESCRIPTION
The certification ECU (smart key ECU assembly) generates a request signal and
transmits the signal to the No. 1 indoor electrical key antenna assembly (front
floor). For the No. 1 indoor electrical key antenna assembly (front floor) to detect
when the electrical key transmitter su ...
Removal
REMOVAL
PROCEDURE
1. REMOVE SLIDING ROOF SIDE GARNISH LH
(a) Fully open the sunshade trim sub-assembly.
(b) Remove the sliding roof side garnish LH.
2. REMOVE SLIDING ROOF SIDE GARNISH RH
HINT:
Use the same procedure as for the LH side.
3. ...
Front Left Seat Heat Sensor Circuit (B14C1)
DESCRIPTION
Output to the front seat cushion heater assembly LH temperature sensor stops
if one of the following occurs: 1) the temperature sensor is open or shorted; or
2) the temperature sensor is damaged and its output value does not change.
DTC Code
DTC Detection Cond ...
