Toyota Tundra Service Manual: Error in Matching of ECUs (C1288)

DESCRIPTION

The skid control ECU (brake actuator assembly) stores this DTC when the previously learned values in the VSC system and engine information sent from the ECM are inconsistent, or when the learning has not completed after the skid control ECU (brake actuator assembly) is replaced with a new one.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1288

Error in Matching of ECUs

ECM does not match.

ECM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.

Click here

PROCEDURE

1.

CHECK ECM OR BRAKE ACTUATOR ASSEMBLY

(a) Check if the ECM or brake actuator assembly had been replaced before the DTC was recorded.

Result

Proceed to

Both the ECM and brake actuator assembly are not replaced

A

The ECM is replaced

B

The brake actuator assembly is replaced

C

B

GO TO STEP 3

C

GO TO STEP 5

A

2.

RECONFIRM DTC

(a) Clear the DTCs.

Click here

(b) Turn the ignition switch off.

(c) Start the engine.

(d) Check if the same DTC is output.

Click here

Result

Proceed to

C1288 is not output

A

C1288 is output

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE ACTUATOR ASSEMBLY

3.

PERFORM SYSTEM VARIANT LEARNING

(a) Perform system variant learning.

Click here

HINT:

  • System variant learning is automatically performed immediately after Test Mode is entered.
  • If learning has not yet been performed, the slip indicator light will remain on and DTC C1288 will be stored.
  • If system variant learning is not successful, the warning lights will not blink in the Test Mode pattern and DTC C1288 will not be cleared.
NEXT

4.

RECONFIRM DTC

(a) Clear the DTCs.

Click here

(b) Turn the ignition switch off.

(c) Start the engine.

(d) Check if the same DTC is output.

Click here

Result

Proceed to

C1288 is not output

A

C1288 is output

B

A

END

B

REPLACE ECM

5.

PERFORM SYSTEM VARIANT LEARNING

(a) Perform system variant learning.

Click here

HINT:

  • System variant learning is automatically performed immediately after Test Mode is entered.
  • If learning has not yet been performed, the slip indicator light will remain on and DTC C1288 will be stored.
  • If system variant learning is not successful, the warning lights will not blink in the Test Mode pattern and DTC C1288 will not be cleared.
NEXT

6.

RECONFIRM DTC

(a) Clear the DTCs.

Click here

(b) Turn the ignition switch off.

(c) Start the engine.

(d) Check if the same DTC is output.

Click here

Result

Proceed to

C1288 is not output

A

C1288 is output

B

A

END

B

REPLACE BRAKE ACTUATOR ASSEMBLY

    Open in Stop Light Switch Circuit (C1249)

    Skid Control ECU Malfunction (C1300)

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