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 there is a problem with the ABS and TRACTION actuator assembly (skid control ECU) power supply circuit, the skid control ECU outputs the DTC and prohibits operation under the fail safe function.
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 ABS and TRACTION actuator assembly, perform zero point calibration (Programming and Relearning).

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 instrument panel J/B.
(b) Check continuity of the ECU-IG fuse.
Standard resistance:





NG -- REPLACE ECU-IG FUSE
OK -- Continue to next step.
3. INSPECT SKID CONTROL ECU (IG1 TERMINAL)
(a) WHEN USING TECHSTREAM:
(1) Connect Techstream to the DLC3.
(2) Start the engine.
(3) Select Data List mode on Techstream.
(4) Measure the voltage condition output from the ECU displayed on Techstream.

ABS / VSC / TRAC:





OK:
"Normal" is displayed.





(b) WHEN NOT USING TECHSTREAM:
(1) Disconnect the skid control ECU connector.
(2) Turn the ignition switch to the ON position.
(3) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- INSPECT SKID CONTROL ECU (GND TERMINAL)
OK -- REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY
4. INSPECT SKID CONTROL ECU (GND TERMINAL)





(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)