Toyota Tacoma (2015-2018) Service Manual: Lost Communication with ECM (C1437)

DESCRIPTION

The skid control ECU (master cylinder solenoid) receives signals from the ECM via the CAN communication system.

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (master cylinder solenoid), perform calibration (See page ).

PROCEDURE

(a) Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to the DTC (See page ).

OK:

Normal (there are no momentary interruptions).

HINT:

Perform the above inspection before removing the sensor and connector.

NG

GO TO STEP 3

OK

(a) Clear the DTCs (See page ).

(b) Turn the ignition switch off.

(c) Start the engine.

(d) Drive the vehicle at a speed of 15 km/h (9 mph) or more for 10 seconds or more.

(e) Check that no CAN communication system DTC is output (See page ).

(f) Check if the same DTC is output (See page ).

A

USE SIMULATION METHOD TO CHECK

B

GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

C

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

(a) Turn the ignition switch off.

(b) Repair or replace the harness or connector.

(c) Check for any momentary interruption between the skid control ECU (master cylinder solenoid) and ECM (See page ).

(d) Check that there is no momentary interruption.

NEXT

(a) Clear the DTCs (See page ).

(b) Turn the ignition switch off.

(c) Start the engine.

(d) Drive the vehicle at a speed of 15 km/h (9 mph) or more for 10 seconds or more.

(e) Check that no CAN communication system DTC is output (See page ).

(f) Check if the same DTC is output (See page ).

A

END

B

REPLACE MASTER CYLINDER SOLENOID

C

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)