DESCRIPTION
If a malfunction is detected in the power supply circuit, the skid control ECU (housed in the actuator assembly) stores this DTC and the fail-safe function prohibits ABS operation.
This DTC is stored when the IG1 terminal voltage deviates from the DTC detection condition due to a malfunction in the power supply or charging circuit such as the battery or alternator circuit, etc.
The DTC is cancelled when the IG1 terminal voltage returns to normal.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1241/41 |
Any of the following is detected:
|
|
WIRING DIAGRAM
PROCEDURE
1. |
INSPECT ECU-IG NO. 2 FUSE |
(a) Remove the ECU-IG NO. 2 fuse from the main body ECU (driver side junction block). |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
ECU-IG NO. 2 (7.5 A) fuse |
Always |
Below 1 Ω |
*1 |
Main Body ECU (Driver Side Junction Block) |
*2 |
ECU-IG NO. 2 Fuse |
NG | ![]() |
REPLACE ECU-IG NO. 2 FUSE |
|
2. |
CHECK BATTERY |
(a) Install the ECU-IG NO. 2 fuse.
(b) Check the battery voltage.
Standard Voltage:
11 to 14 V
Result |
Proceed to |
---|---|
OK |
A |
NG (for 2GR-FE) |
B |
NG (for 1AR-FE) |
C |
B | ![]() |
CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2GR-FE) |
C | ![]() |
CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 1AR-FE) |
|
3. |
INSPECT SKID CONTROL ECU (IG1 TERMINAL) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. |
|
(b) Disconnect the skid control ECU connector.
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A42-28 (IG1) - Body ground |
Ignition switch ON |
11 to 14 V |
*1 |
Front view of wire harness connector (to Brake Actuator (Skid Control ECU)) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) |
|
4. |
INSPECT SKID CONTROL ECU (GND1 TERMINAL) |
(a) Turn the ignition switch off. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A42-4 (GND1) - Body ground |
Always |
Below 1 Ω |
*1 |
Front view of wire harness connector (to Brake Actuator (Skid Control ECU)) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT) |
|
5. |
RECONFIRM DTC |
(a) Reconnect the skid control ECU connector.
(b) Clear the DTCs (See page ).
(c) Start the engine.
(d) Perform a road test.
(e) Check if the same DTC is recorded (See page
).
Result |
Proceed to |
---|---|
DTC (C1241/41) is not output |
A |
DTC (C1241/41) is output |
B |
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table,
refer back to the table and proceed to the next step (See page
).
A | ![]() |
CHECK FOR INTERMITTENT PROBLEMS |
B | ![]() |
REPLACE BRAKE ACTUATOR ASSEMBLY |
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is displayed during the DTC check, inspect the trouble areas
listed for that code. For details of the code, refer to the ''See page'' below.
Front Power Seat Control System (w/ Memory)
...
Lost Communication with ECM / PCM "A" (U0100,U0129)
DESCRIPTION
The combination meter assembly communicates with the ECM via the CAN communication
system (CAN No. 1 Bus).
DTC No.
DTC Detection Condition
Trouble Area
U0100
When either of the follow ...
Check CAN Bus Line for Short to GND
DESCRIPTION
There may be a short circuit between the CAN bus main wire and GND when there
is no resistance between terminals 6 (CANH) and 4 (CG) or 14 (CANL) and 4 (CG) of
the DLC3.
Symptom
Trouble Area
No resistanc ...