Toyota Tacoma (2015-2018) Service Manual: Engine Control System Malfunction (C1201)

Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Vacuum Brake Booster) / Engine Control System Malfunction (C1201)

DESCRIPTION

If a malfunction in the engine control system is detected, VSC and TRAC operations are prohibited by the fail-safe function.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1201	Engine Control System Malfunction	A malfunction signal is received from the ECM.	Engine control system

PROCEDURE

1.	CHECK DTC (ENGINE CONTROL SYSTEM)

(a) Check if any engine control system DTC is output.

Result

Result	Proceed to
DTC is not output	A
DTC is output	B

USE SIMULATION METHOD TO CHECK

GO TO ENGINE CONTROL (DIAGNOSTIC TROUBLE CODE CHART)

SM Solenoid Circuit (C1225,C1468,C1469,C146A,C146B)

DESCRIPTION These solenoids turn on when signals are received from the skid control ECU (brake actuator assembly) and they control the pressure acting on the wheel cylinders to control the brakin ...

ECM Communication Circuit Malfunction (C1203)

DESCRIPTION The circuit is used to send TRAC and VSC control information from the skid control ECU (brake actuator assembly) to the ECM, and engine control information from the ECM to the skid co ...

Other materials:

Precaution
PRECAUTION 1. IGNITION SWITCH EXPRESSIONS (a) The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section. Expression Ignition Switch (Position) Engine ...

Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS 1. CHECK FOR INTERMITTENT PROBLEMS HINT: A momentary interruption (open circuit) in the connectors and/or wire harnesses between the sensors and ECUs can be detected using the ECU Data List function of the Techstream. (a) Turn the ignition switch off. (b) Con ...

Rear Body Side Panel Protector
Components COMPONENTS ILLUSTRATION ILLUSTRATION Installation INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. PROCEDURE 1. INSTALL REAR BODY SIDE PANEL PROTECTOR (a) for Sho ...