Toyota Avalon Service & Repair Manual: Vehicle Speed Sensor Circuit (C1AA3)

DESCRIPTION

The forward recognition camera receives vehicle speed signals from the skid control ECU (brake booster with master cylinder assembly). If the skid control ECU (brake booster with master cylinder assembly) receives a vehicle speed sensor malfunction signal, it informs the forward recognition camera via CAN communication, and DTC C1AA3 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AA3

Vehicle Speed Sensor Circuit

2 seconds after the power switch is turned on (IG), a signal from the skid control ECU (brake booster with master cylinder assembly) indicating a malfunction in a vehicle speed sensor is detected by the forward recognition camera for 5 seconds or more.

Electronically controlled brake system

CAUTION / NOTICE / HINT

NOTICE:

The front 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.

Click here

PROCEDURE

1.

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

HINT:

If DTC C1AA3 is output by the front camera system, perform troubleshooting for the electronically controlled brake system.

Click here

NEXT

END

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