Toyota Tacoma (2015-2018) Service Manual: Vehicle Information Not Obtained (C1A02)

Toyota Tacoma (2015-2018) Service Manual / Pre-collision / Pre-collision System / Vehicle Information Not Obtained (C1A02)

DESCRIPTION

When a new millimeter wave radar sensor assembly is installed, it receives vehicle specification information from the main body ECU (multiplex network body ECU) and stores the information.

DTC C1A02 is stored when the millimeter wave radar sensor assembly receives the vehicle specification information from the main body ECU (multiplex network body ECU) but cannot store it.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A02	Vehicle Information Not Obtained	When the vehicle is being driven at a speed of 50 km/h (32 mph) or more, the millimeter wave radar sensor assembly does not have stored vehicle information for 1 second or more.	Millimeter wave radar sensor assembly

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.
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PROCEDURE

1.	CHECK FOR DTCs (PRE-COLLISION SYSTEM)

(a) Clear the DTCs.

Click here (b) Make sure that the DTC detection conditions are met.

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

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Result	Proceed to
DTC C1A02 is not output	A
DTC C1A02 is output	B

USE SIMULATION METHOD TO CHECK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

Yaw Rate Sensor (C1A46)

DESCRIPTION If the millimeter wave radar sensor assembly receives a yaw rate sensor malfunction signal from the yaw rate sensor (airbag sensor assembly) or yaw rate sensor zero point malfunction ...

Front Radar Sensor (C1A10)

DESCRIPTION When an internal malfunction is detected in the millimeter wave radar sensor assembly, DTC C1A10 is stored. DTC No. Detection Item DTC Detection Condit ...

Other materials:

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT CAMSHAFT TIMING GEAR BOLT (a) Remove the camshaft timing oil control solenoid assembly (See page ). (b) Check that the plunger strokes when the plunger in the center of the camshaft timing gear bolt is pressed. Standard stroke: 4 ...

Driver Side Door ECU Communication Stop (B2321)
DESCRIPTION This DTC is stored when LIN communication between the front power window regulator motor assembly LH and main body ECU (multiplex network body ECU) stops for 10 seconds or more. DTC No. DTC Detection Condition Trouble Area B2321 ...

System Description
SYSTEM DESCRIPTION PRE-COLLISION SYSTEM DESCRIPTION (a) The pre-collision system uses the pre-collision warning control, pre-collision brake assist control and pre-collision braking control to help avoid a collision or reduce the impact if it determines that the possibility of a collision is h ...