C1241

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

DTC C1241/41 - Low Battery Positive Voltage

DESCRIPTION

If the voltage supplied to the IG1 terminal is not within the DTC detection threshold due to malfunctions in such as the battery and alternator circuit, this DTC is stored.






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE:
When replacing the master cylinder solenoid, perform zero point calibration Calibration.

PROCEDURE

1. INSPECT BATTERY
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
NG -- INSPECT CHARGING SYSTEM
OK -- Continue to next step.
2. INSPECT ECU-IG FUSE




(a) Remove the ECU-IG fuse from the driver side J/B.
(b) Check the ECU-IG fuse.
Standard resistance:
Below 1 Ohms
NG -- REPLACE ECU-IG FUSE
OK -- Continue to next step.
3. READ VALUE USING TECHSTREAM (IG1 POWER SUPPLY)
(a) Install the ECU-IG fuse.
(b) Connect Techstream to the DLC3.
(c) Turn the ignition switch to the ON position and push Techstream main switch ON.
(d) Start the engine.
(e) Select "Data List" mode on Techstream.

ABS/VSC/TRAC





(f) Measure the voltage output from the ECU displayed on Techstream.
OK:
"Normal" is displayed.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)
OK -- Continue to next step.
4. INSPECT SKID CONTROL ECU (IG1 TERMINAL)




(a) Install the ECU-IG fuse.
(b) Disconnect the skid control ECU connector.
(c) Turn the ignition switch to the ON position.
(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.
5. INSPECT SKID CONTROL ECU (GND TERMINAL)




(a) Disconnect the skid control ECU (S38) connector.
(b) 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.
6. RECONFIRM DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Check if the same DTCs are detected Reading and Clearing Diagnostic Trouble Codes.
HINT: Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

Result:






C -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
B -- END
A -- REPLACE MASTER CYLINDER SOLENOID