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:

Reassembly
REASSEMBLY PROCEDURE 1. INSTALL CONSOLE COMPARTMENT DOOR HINGE SUB-ASSEMBLY (a) Engage the 2 guides to install the console compartment door hinge sub-assembly. (b) Install the 4 screws. (c) Engage the 2 guides and 4 claws ...

Cruise control
Use the cruise control to maintain a set speed without depressing the accelerator pedal. Indicator Cruise control switch ■ Setting the vehicle speed Press the ON-OFF button to activate the cruise control. Cruise control indicator will come on. Press the button again to deactivate ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...