Toyota Tacoma (2015-2018) Service Manual: 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 |
| A | .gif) |
USE SIMULATION METHOD TO CHECK |
| B | |
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:
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 symptom by
check ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
NOTICE:
Replace the blind spot monitor sensor if it has been dropped or subjected to
a severe impact.
PROCEDURE
1. REMOVE REAR BUMPER ASSEMBLY (w/ Towing Package)
(See page )
2. REMOVE REAR BUMPER ASSEMBLY (w/o Towing Package)
(See page )
3. REMOVE CONN ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT BRAKE VACUUM CHECK VALVE ASSEMBLY
(a) Check that there is ventilation from the booster to the engine, and
no ventilation from the engine to the booster.
If the results are not as specified, replace the vacuum check valve.
...
