- Engine and drive source that are sent from the ECM do not match the ones of the skid control ECU (brake actuator assembly).
- No stored information for engine and drive source.
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM10000000104IG |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - 11/2017] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1203,C1270; ECM Communication Circuit Malfunction; 2017 MY Sienna [08/2016 - 11/2017] | ||
|
DTC |
C1203 |
ECM Communication Circuit Malfunction |
|
DTC |
C1270 |
Initialization Incomplete (Test Mode DTC) |
DESCRIPTION
This circuit is used to send TRAC and VSC operation information from the skid control ECU (brake actuator assembly) to the ECM, and engine control information from the ECM to the skid control ECU (brake actuator assembly) via CAN communication.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1203 |
Either of the following is detected: |
|
|
C1270 |
Detected only during Test Mode. |
|
CAUTION / NOTICE / HINT
NOTICE:
When replacing the brake actuator assembly, perform zero point calibration and store system information (See page
![2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION](/t3Portal/stylegraphics/info.gif)
).
PROCEDURE
|
1. |
CHECK PART NUMBER (ECM) |
(a) Check that the proper ECM is installed.
OK:
Proper ECM is installed.
(b) Check if the ECM was replaced before the DTC was stored.
OK:
ECM was not replaced.
Result
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (A proper ECM is not installed and/or the ECM was replaced.) |
B |
| B |
|
|
|
2. |
CHECK PART NUMBER (BRAKE ACTUATOR ASSEMBLY) |
(a) Check that a proper skid control ECU (brake actuator assembly) is installed.
OK:
Proper skid control ECU (brake actuator assembly) is installed.
(b) Check if the skid control ECU (brake actuator assembly) had been replaced before the DTC was recorded.
OK:
Skid control ECU (brake actuator assembly) had not been replaced.
Result
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (The skid control ECU (brake actuator assembly) had been replaced.) |
B |
|
NG (A proper skid control ECU (brake actuator assembly) is not installed.) |
C |
| B |
|
PERFORM ZERO POINT CALIBRATION AND STORE SYSTEM INFORMATION OF YAW RATE AND ACCELERATION SENSOR |
| C |
|
|
|
3. |
CLEAR AND STORE SYSTEM INFORMATION |
(a) Clear the system information.
(b) Store the system information.
|
|
4. |
RECONFIRM DTC |
(a) Clear the DTCs (See page
).
(b) Turn the ignition switch off.
(c) Turn the ignition switch to ON.
(d) Check if the same DTC is output.
Check if the same DTC is output (See page
).
Result
|
Result |
Proceed to |
|---|---|
|
DTC (C1203) is not output |
A |
|
DTC (C1203) is output |
B |
| A |
|
| B |
|
|
|