Toyota 4Runner: ECM Communication Circuit Malfunction (C1203)
DESCRIPTION
The circuit is used to send control information from the skid control ECU to the ECM, and engine control information from the ECM to the skid control ECU via the CAN communication system.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1203 |
The engine/drivetrain specification and/or destination information from the ECM does not match the skid control ECU data. |
ECM |
PROCEDURE
|
1. |
CHECK DTC (ENGINE CONTROL SYSTEM) |
(a) Check if any DTC is recorded for the engine control system (See page
.gif)
).
Result
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC is output |
B |
| A | .gif) |
REPLACE ECM |
| B | |
GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
Open in ABS Solenoid Relay Circuit (C0278,C0279)
DESCRIPTION
The solenoid relay is built into the master cylinder solenoid.
This relay supplies power to each solenoid. If the initial check is OK, after
the ignition switch is turned to ON, the re ...
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 ...
Other materials about Toyota 4Runner:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the wiper and washer system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Trouble Codes.
(e) Check for DTCs.
2. CLEAR DTC
(a) Conn ...
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