Toyota Tundra Service Manual: Vehicle Speed Tolerance Malfunction (C1AA2)

Toyota Tundra Service Manual / Engine, Hybrid System / Cruise Control / Lane Departure Alert 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

When the vehicle is being driven at a speed of 5 km/h (3 mph) or more 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 learning.

    Click here

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.

    Click here

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.

INSPECT COMBINATION METER ASSEMBLY (OPERATION CHECK)

(a) Perform Operation Check of the meter/gauge system.

Click here

HINT:

Check the meter function by referring to Operation Check for the combination meter assembly.

Result

Proceed to

Combination meter assembly is normal

A

Combination meter assembly is malfunctioning

B
B

CHECK METER / GAUGE SYSTEM (SPEEDOMETER MALFUNCTION)

A

2.

CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

(e) Clear the DTCs.

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

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

(g) Check for DTCs.

Result

Proceed to

DTC C1AA2 is output

A

DTC C1AA2 is not output

B
B

USE SIMULATION METHOD TO CHECK

A

3.

REPLACE FORWARD RECOGNITION CAMERA

(a) Replace the forward recognition camera.

Click here

(b) Adjust the forward recognition camera.

Click here

NEXT

4.

CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

(e) Clear the DTCs.

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

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

(g) Check for DTCs.

Result

Proceed to

DTC C1AA2 is output

A

DTC C1AA2 is not output

B
A

REPLACE COMBINATION METER ASSEMBLY

B

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)
    FCM Destination Information Unmatched (C1AA1)

    Vehicle Speed Sensor Circuit (C1AA3)

    See More:

    Toyota Tundra Service Manual > Meter / Gauge System: Entire Combination Meter does not Operate
    DESCRIPTION This circuit is the power source circuit for the combination meter assembly. This circuit provides 2 power source types: one is a constant power source mainly used as a backup power source, and other is a power source mainly used for signal transmission. The constant power source is main ...

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