Toyota Tacoma (2015-2018) Service Manual: Vehicle Speed Tolerance Malfunction (C1AA2)

Toyota Tacoma (2015-2018) Service Manual / Cruise Control / Forward Recognition Camera System / 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 malfunction signal, it informs the forward recognition camera via CAN communication, and DTC C1AA2 is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AA2	Vehicle Speed Tolerance Malfunction	3 seconds after the ignition switch is turned to ON, a signal from the combination meter assembly indicating an abnormal vehicle speed tolerance is detected by the forward recognition camera for 50 seconds or more.	Meter/gauge system Combination meter 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 Axis Adjustment.
Click here
The forward recognition camera 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.
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PROCEDURE

1.	CHECK FOR DTCs (METER / GAUGE SYSTEM)

HINT:

Forward recognition camera system DTC C1AA2 may be stored due to a malfunction in the meter/gauge system. Therefore it is necessary to check for and troubleshoot meter/gauge system DTCs first.

(a) Check for DTCs.

Click here

Result	Proceed to
Meter/gauge system DTCs are not output	A
Meter/gauge system DTCs are output	B

CHECK METER / GAUGE SYSTEM

2.	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 C1AA2 is not output	A
DTC C1AA2 is output	B

USE SIMULATION METHOD TO CHECK

3.	REPLACE FORWARD RECOGNITION CAMERA

(a) Replace the forward recognition camera.

Click here (b) Perform forward recognition camera axis adjustment.

(b) Perform forward recognition camera axis adjustment.

Click here

4.	CHECK DTC OUTPUT (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 following procedure is not performed, the previously output DTC cannot be detected.

Click here

Result	Proceed to
DTC C1AA2 is not output	A
DTC C1AA2 is output	B

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)

REPLACE COMBINATION METER ASSEMBLY

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