DESCRIPTION |
DTC No. | Detection Item |
INF Code | DTC Detection Condition |
Trouble Area | MIL |
Note | | C1203 |
ECM Communication Circuit |
1161 | Either of the following is detected:
- Identification information sent from other ECUs does not match with the value stored when shipped from the factory.
- Identification information sent from other ECUs is not stored when shipped from the factory.
|
- Other ECUs are not installed correctly
- Skid control ECU (brake booster with master cylinder assembly)
| Comes on |
- INF Code 1161: SAE Code C124A
- Electronically controlled brake system DTC
HINT:
- DTC C1203 (INF code 1161) is cleared when the conditions return to normal.
- This DTC is stored when incorrect identification information is detected and is not due to an ECM communication error.
| NOTICE: DTC
C1203 is output when an incorrect ECU is installed. If initialization
is performed and learning occurs with an incorrect ECU installed,
operations and functions will differ from those stored when the vehicle
was shipped from the factory. Therefore, make sure that learning occurs
properly. MONITOR DESCRIPTION When
the vehicle is being driven, if the vehicle information, drive type or
steering wheel position cannot be confirmed, the memorized data does not
match or other related information cannot be stored such as when the
ECU that was installed when the vehicle left the factory is changed or
the EEPROM is malfunctioning, the skid control ECU (brake booster with
master cylinder assembly) illuminates the MIL and stores this DTC. MONITOR STRATEGY |
Related DTCs | C124A: CAN communication identification signal | |
Required Sensors/Components(Main) | Skid control ECU (brake booster with master cylinder assembly) | |
Required Sensors/Components(Related) | Skid control ECU (brake booster with master cylinder assembly)
Speed sensor | | Frequency of Operation |
Continuous | | Duration | - | |
MIL Operation | Immediately | |
Sequence of Operation | None | TYPICAL ENABLING CONDITIONS |
Monitor runs whenever the following DTCs are not stored |
None | | All of the following conditions are met |
- | | EEPROM read-in | Complete | |
IG1 | On | | Vehicle speed |
40 km/h (25 mph) or more | TYPICAL MALFUNCTION THRESHOLDS |
Both of the following conditions are met | A and B | |
A. Test Mode | Off | |
B. One of the following conditions is met |
- | | Grade info | Undetermined or different from a storage memory | |
Drive train info | Undetermined or different from a storage memory | |
Steering info | Undetermined or different from a storage memory | |
Car spec info | There is no write-in | COMPONENT OPERATING RANGE |
All of the following conditions are met | - | |
EEPROM read-in | Complete | |
IG1 | On | | Test Mode |
Off | | Grade info |
Decision and concordance from a storage memory | |
Drive train info | Decision and concordance from a storage memory | |
Steering info | Decision and concordance from a storage memory | |
Car spec info | There is write-in | CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off.
- Turn the power switch on (READY).
- Turn the Techstream on.
- Confirm that the vehicle is not in Test Mode and drive the vehicle at a speed of 40 km/h (25 mph) or more for 1 minute.
- Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
- Read the DTCs.
HINT:
- If a DTC is output, the system is malfunctioning.
- If a DTC is not output, perform the following procedure.
- If the DTCs are not output, perform a universal trip and check for permanent DTCs.
Click here 
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTCs are output, the system is normal.
CAUTION / NOTICE / HINT NOTICE: After
replacing the skid control ECU (brake booster with master cylinder
assembly), perform linear solenoid valve offset learning, ABS holding
solenoid valve learning, yaw rate and acceleration sensor zero point
calibration and system information memorization after performing "Reset
Memory". Click here PROCEDURE
(a) Check that the proper hybrid vehicle control ECU and main body ECU (multiplex network body ECU) are installed.
OK: Proper ECUs are installed. (b)
Check if the hybrid vehicle control ECU and main body ECU (multiplex
network body ECU) were replaced before the DTC was recorded. OK: ECUs were not replaced.
| Result |
Proceed to | | OK |
A | | NG (A proper hybrid vehicle control ECU is not installed and/or the hybrid vehicle control ECU was replaced.) |
B | | NG
(A proper main body ECU (multiplex network body ECU) is not installed
and/or the main body ECU (multiplex network body ECU) was replaced.) |
C |
| B |
 | REPLACE HYBRID VEHICLE CONTROL ECU |
| C |
| REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
A |
 | |
| 2. |
PERFORM INITIALIZATION | (a) Perform linear solenoid valve offset learning, ABS holding solenoid valve learning and system information memorization.
Click here Chassis > ABS/VSC/TRAC > Utility
|
Tester Display | | ECB Utility |
(b) Perform yaw rate and acceleration sensor zero point calibration. Click here
Chassis > ABS/VSC/TRAC > Utility
HINT:
- After installing a new skid control ECU (brake booster with master
cylinder assembly), before performing linear solenoid valve offset
learning, ABS holding solenoid valve learning, yaw rate and acceleration
sensor zero point calibration and system information memorization, DTC
C1203 will be output.
- If linear solenoid valve offset learning, ABS holding solenoid valve
learning, yaw rate and acceleration sensor zero point calibration and
system information memorization are not performed, DTC C1203 will be
output after the data stored in the skid control ECU (brake booster with
master cylinder assembly) is cleared by performing "Reset Memory" using
Techstream.
|
NEXT | |
| |
(a) Clear the DTCs.
Click here Chassis > ABS/VSC/TRAC > Clear DTCs
(b) Turn the power switch off. (c) Turn the power switch on (IG).
(d) Check if the same DTC is output. Click here
Chassis > ABS/VSC/TRAC > Trouble Codes
| Result |
Proceed to | | DTC C1203 is output. |
A | | DTC C1203 is not output. |
B |
| A |
| REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
| B |
| END | | 
