Toyota CH-R Service Manual: Front Camera Module Incorrect Axial Gap (C1AA8,C1AA9)

DESCRIPTION

If the millimeter wave radar sensor assembly detects that the forward recognition camera beam has an axis misalignment, DTC C1AA8 is output.

Also if forward recognition axis adjustment has not been performed or did not complete normally after the forward recognition camera was replaced with a new one, DTC C1AA9 is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AA8	Front Camera Module Incorrect Axial Gap	When the pre-collision system is operating, the millimeter wave radar sensor assembly continuously receives a signal indicating that the beam axis of the forward recognition camera is misaligned for 0.3 seconds or more.	Forward recognition camera system Millimeter wave radar sensor assembly
C1AA9	Front Camera Module Beam Axis Not Adjusted	When the pre-collision system is operating, the millimeter wave radar sensor assembly detects that forward recognition axis adjustment has not been completed for 0.3 seconds or more.	Forward recognition camera system Millimeter wave radar sensor assembly

CAUTION / NOTICE / HINT

PROCEDURE

1.	CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

HINT:

Pre-collision system DTC C1AA8 and/or C1AA9 may be stored due to a malfunction in the forward recognition camera system. Therefore, it is necessary to check for and troubleshoot forward recognition camera system DTCs first.

(a) Check for DTCs.

Click here

Chassis > Front Recognition Camera > Trouble Codes

Result	Proceed to
Forward recognition camera system DTCs are not output	A
Forward recognition camera system DTCs are output	B

B

GO TO FORWARD RECOGNITION CAMERA SYSTEM

A

2.	CHECK FOR DTCs (PRE-COLLISION SYSTEM)

(a) Clear the DTCs.

Click here

Body Electrical > Pre-Collision 2 > Clear DTCs

(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

Body Electrical > Pre-Collision 2 > Trouble Codes

Result	Proceed to
DTC C1AA8 and/or C1AA9 is not output	A
DTC C1AA8 and/or C1AA9 is output	B

A

USE SIMULATION METHOD TO CHECK

B

3.	REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Replace the millimeter wave radar sensor assembly.

Click here

(b) Adjust the millimeter wave radar sensor assembly.

Click here

NEXT

4.	CHECK FOR DTCs (PRE-COLLISION SYSTEM)

(a) Clear the DTCs.

Click here

Body Electrical > Pre-Collision 2 > Clear DTCs

(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

Body Electrical > Pre-Collision 2 > Trouble Codes

Result	Proceed to
DTC C1AA8 and/or C1AA9 is not output	A
DTC C1AA8 and/or C1AA9 is output	B

A

END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)

B

REPLACE FORWARD RECOGNITION CAMERA