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





WIRING DIAGRAM





INSPECTION PROCEDURE

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 FUSE (IG1 NO. 2)





(a) Remove the IG1 NO. 2 fuse from the driver side J/B.
(b) Measure the resistance of the IG1 NO. 2 fuse.
Standard Resistance:
Below 1 Ohms
(c) Reinstall the IG1 NO. 2 fuse.
NG -- CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE
OK -- Continue to next step.
3. READ VALUE USING DATA LIST (IG VOLTAGE)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn Techstream ON.
(d) Select "Data List" mode on Techstream.

ABS/VSC/TRAC





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





(a) Disconnect the skid control ECU connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage.
Standard Voltage:





(d) Turn the ignition switch to OFF.
(e) Reconnect the skid control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (GND TERMINAL CONTINUITY)





(a) Disconnect the skid control ECU connectors.
(b) Measure the resistance.
Standard Resistance:





(c) Reconnect the skid control ECU connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. RECONFIRM DTC
(a) Clear the DTCs (Reading and Clearing Diagnostic Trouble Codes).
(b) Drive the vehicle at a speed of 3 km/h (1.9 mph) or more for 10 seconds or more.
(c) Check if the same DTCs are detected.

HINT: Reinstall the sensors, connectors, etc. and restore the vehicle to its previous condition, before rechecking for DTCs.





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