Vehicle Stability Control System (to 12/2010)

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1241/41: Low Battery Positive Voltage or Abnormally High Battery Positive Voltage
C1241/41 - Low Battery Positive Voltage or Abnormally High Battery Positive Voltage

DESCRIPTION

If a malfunction is detected in the power supply circuit, the skid control ECU (housed in the ABS & TRACTION actuator assembly) outputs the DTC and prohibits operation with 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

NOTICE:
When replacing the ABS & TRACTION actuator assembly, perform zero point calibration Calibration (to 12/2010).

PROCEDURE

1. INSPECT FUSE (ECU IG NO.2 FUSE)

(a) Remove the ECU IG No. 2 fuse from the instrument panel junction block.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- CHECK FOR SHORT IN ALL HARNESS AND CONNECTOR CONNECTED TO FUSE AND REPLACE FUSE
OK -- Continue to next step.

2. CHECK BATTERY

(a) Install the ECU IG No. 2 fuse.

(b) Check the battery voltage.

Standard voltage:

10 to 14 V

NG -- INSPECT CHARGING SYSTEM
OK -- Continue to next step.

3. INSPECT SKID CONTROL ECU (IG1 TERMINAL)

(a) Disconnect the skid control ECU connector.





(b) Turn the ignition switch on (IG).

(c) 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) 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. READ VALUE USING TECHSTREAM (ECU IG POWER VOLTAGE)

(a) Reconnect the skid control ECU connector.

(b) Connect the Techstream to the DLC3.

(c) Start the engine.

(d) Select the Data List mode on the Techstream.

ABS/VSC/TRAC





(e) Read the voltage condition output from the ECU displayed on the Techstream.

OK:

"NORMAL" is displayed.

HINT
These DTCs may be restored due to a malfunction in the connector terminal connection, etc.

NG -- REPLACE ABS & TRACTION ACTUATOR ASSEMBLY
OK -- Continue to next step.

6. RECONFIRM DTC

(a) Clear the DTC DTC Check / Clear (to 12/2010).

(b) Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.

(c) Check if the same DTC is recorded DTC Check / Clear (to 12/2010).

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 (to 12/2010).

B -- REPLACE ABS & TRACTION ACTUATOR ASSEMBLY

A -- END