Toyota 4Runner: ECU Initial Setting Incomplete (C120A)
DESCRIPTION
w/ Downhill Assist Control or w/ Crawl Control:
When the master cylinder solenoid (skid control ECU) is replaced, the master cylinder solenoid (skid control ECU) must be informed that the vehicle is equipped with downhill assist control and/or crawl control.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C120A |
The master cylinder solenoid is not informed that the vehicle is equipped with downhill assist control or crawl control and downhill assist control or crawl control operates. |
Calibration not performed |
PROCEDURE
|
1. |
PERFORM CALIBRATION |
(a) Perform calibration (See page .gif)
).
NOTICE:
If a DTC is output after replacing the master cylinder solenoid, it is possible that calibration has not been performed or the zero point calibration data was not cleared when calibration was performed.
|
.gif)
|
2. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
Result
|
Result |
Proceed to |
|---|---|
|
DTC C120A is output |
A |
|
DTC C120A is not output |
B |
| B | .gif) |
END |
|
|
3. |
CHECK TEST MODE DTC |
(a) Switch the vehicle to test mode, perform the downhill assist control switch
or crawl switch signal check, and then check that DTC C1379 is cleared (See page
).
Result
|
Result |
Proceed to |
|---|---|
|
DTC is not cleared |
A |
|
DTC is cleared |
B |
| A | |
GO TO DTC C1379 |
| B | |
USE SIMULATION METHOD TO CHECK |
ECM Communication Circuit Malfunction (C1203)
DESCRIPTION
The circuit is used to send control information from the skid control ECU to
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DESCRIPTION
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DESCRIPTION
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Dtc Check / Clear
DTC CHECK / CLEAR
1. DTC CHECK / CLEAR (when Using Techstream)
(a) Check for DTCs.
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the Techstream on.
(4) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Cod ...
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