Vehicle Stability Control System

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1241/41: Low Battery Positive Voltage

DTC C1241/41 - Low Battery Positive Voltage

DESCRIPTION

If a malfunction is detected in the power supply circuit, the skid control ECU outputs this DTC and prohibits operations using the fail safe function.
This DTC is stored when the IG1 terminal voltage deviates from the DTC detecting 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.






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE:
When replacing the skid control ECU, perform zero point calibration and store system information Vehicle Stability Control System.

PROCEDURE

1. INSPECT ECU-IG LH FUSE




(a) Remove the ECU-IG LH fuse from the main body ECU LH (cowl side junction block LH).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE ECU-IG LH FUSE
OK -- Continue to next step.

2. CHECK BATTERY
(a) Install the ECU-IG LH fuse.
(b) Check the battery voltage.
Standard voltage:
11 to 14 V
NG -- CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2GR-FSE)
OK -- Continue to next step.

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 engine switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)
OK -- Continue to next step.

4. INSPECT SKID CONTROL ECU (GND TERMINAL)




(a) Turn the engine switch off.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(c) Disconnect the skid control ECU connectors.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- Continue to next step.

5. RECONFIRM DTC
(a) Reconnect the skid control ECU connectors.
(b) Clear the DTCs Vehicle Stability Control System.
(c) Start the engine.
(d) Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.
(e) Check if the same DTC is recorded Vehicle Stability Control System.
Result:





HINT: If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

B -- REPLACE SKID CONTROL ECU
A -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)