Toyota Tacoma 2015-2018 Service Manual: Front Radar Sensor Region Code Mismatch (C1A0A)

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Forward Recognition Camera System / Front Radar Sensor Region Code Mismatch (C1A0A)

DESCRIPTION

The forward recognition camera receives necessary information from the millimeter wave radar sensor assembly.

When the forward recognition camera judges that a millimeter wave radar sensor assembly which is not compatible with the vehicle has been installed, DTC C1A0A is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A0A	Front Radar Sensor Region Code Mismatch	After the ignition switch is turned to ON for 3 seconds or more, the forward recognition camera detects that a millimeter wave radar sensor assembly which is not compatible with the vehicle is installed for 5 seconds or more.	Millimeter wave radar sensor assembly Forward recognition camera

CAUTION / NOTICE / HINT

NOTICE:

When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.
Click here
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

PROCEDURE

1.	CHECK FOR DTCs (FORWARD RECOGNITION CAMERA 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 conditions are not met, the system cannot detect the malfunction.

Click here

Result	Proceed to
DTC C1A0A is not output	A
DTC C1A0A is output	B

USE SIMULATION METHOD TO CHECK

2.	REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Replace the millimeter wave radar sensor assembly.

Click here (b) Adjust the millimeter wave radar sensor assembly.

(b) Adjust the millimeter wave radar sensor assembly.

Click here

3.	CHECK FOR DTCs (FORWARD RECOGNITION CAMERA 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 conditions are not met, the system cannot detect the malfunction.

Click here

Result	Proceed to
DTC C1A0A is not output	A
DTC C1A0A is output	B

END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)

REPLACE FORWARD RECOGNITION CAMERA

Vehicle Speed Tolerance Malfunction (C1AA2)

DESCRIPTION The forward recognition camera receives vehicle speed tolerance signals from the combination meter assembly. If the combination meter assembly detects a vehicle speed tolerance malfun ...

Steering Angle Sensor (C1A47)

DESCRIPTION The forward recognition camera receives steering angle information from the spiral cable with sensor sub-assembly. If the forward recognition camera detects a spiral cable with sensor ...

Other materials:

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE REAR AXLE SHAFT SNAP RING (a) Using a snap ring expander, remove the snap ring. 2. REMOVE REAR AXLE SHAFT (a) Using SST and press, remove the rear axle shaft. SST: 09521-25011 SST: 09521-25021 3. REMOVE REAR AXLE BEARING RETAINER INNER (a) Remove the rear ...

Precaution
PRECAUTION 1. Check that the battery cables are connected to the correct terminals. 2. Disconnect the battery cables when the battery is given a quick charge. 3. Do not perform tests with a high voltage insulation resistance tester. 4. Never disconnect the battery while the engine is running. 5 ...

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE REAR PROPELLER SHAFT BOOT CLAMP (a) Place matchmarks on the propeller shaft and sleeve yoke. Text in Illustration *1 Rear Propeller Shaft Boot Clamp *2 Rear Sliding Shaft ...