Toyota Tundra Service Manual: Communication Error from VSC to ECM (P1630)

DESCRIPTION

The skid control ECU (brake actuator assembly) sends signals such as cruise control cancel signals and brake demand response signals to the ECM when the dynamic radar cruise control system is operating.

CAUTION / NOTICE / HINT

NOTICE:

• Before replacing the ECM, refer to Registration.

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• 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.

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PROCEDURE

(a) Using the Techstream, check if the CAN communication system is functioning normally.

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NG

GO TO CAN COMMUNICATION SYSTEM

OK

(a) Clear the DTCs.

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(b) Perform the following to make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the malfunction cannot be detected.

1. Turn the ignition switch to ON.
2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
3. Drive the vehicle at 36 km/h (22 mph) or more for 0.5 seconds or more.

(c) Check for DTCs.

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A

USE SIMULATION METHOD TO CHECK

B

(a) Replace the skid control ECU (brake actuator assembly).

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NEXT

(a) Clear the DTCs.

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(b) Perform the following to make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the malfunction cannot be detected.

1. Turn the ignition switch to ON.
2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
3. Drive the vehicle at 36 km/h (22 mph) or more for 0.5 seconds or more.

(c) Check for DTCs.

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A

END

B

REPLACE ECM