MITSUBISHI ENDEAVOR 2004 Service Repair Manual

Fig. 26: Status Of Operation Valve Specification

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
WHEN THE ACTIVE SKID CONTROL IS HOLDING THE FLUID PRESSURE WHILE THE BRAKE PEDAL IS
DEPRESSED Fig. 27: Active Skid Control Is Holding Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor

The system closes the inlet and outlet solenoids to hold the fluid pressure to the
wheel cylinders. The brake fluid, which is pumped through the hydraulic unit
reservoir, may exceed a predetermined pressure. In that case, the excessive fluid is
returned through the relief valve to the hydraulic unit reservoir.
Fig. 28: Status Of Operation Valve Specification

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
WHEN THE ACTIVE SKID CONTROL IS DECREASING THE FLUID PRESSURE WHILE THE BRAKE PEDAL
IS DEPRESSED NOTE: *: When the ASC is operating while the brake pedal is
depressed, the suction valve turns on and off according to
the brake fluid amount supplied to the buffer chamber.
2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor

Fig. 29: Active Skid Control Is Decreasing Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
The system closes the inlet solenoid and opens the outlet solenoid. This causes the
brake fluid in the wheel cylinders to return to the buffer chamber, and decreases the
fluid pressure in the wheel cylinders. If the returned brake fluid pressure exceeds a
predetermined pressure, excessive brake fluid is returned to the master cylinder.

2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor

Fig. 30: Status Of Operation Valve Specificatio
n
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
TRACTION CONTROL SYSTEM OPERATION The TCL/ASC-ECU receives information from the PCM, the G and yaw-rate
sensor, and the wheel speed sensor. If the ECU determines that a road wheel is
spinning, it will control the fluid pressure to the spinning wheel to apply torque to
the other road wheels. The operations of the ABS solenoid valves and the active
skid control system valves are the same as for the active skid control system.
Furthermore, the system also controls the engine if the accelerator pedal is
depressed excessively. TCL/ASC DIAGNOSIS INTRODUCTION TO TRACTION CONTROL/ACTIVE SKID CONTROL SYSTEM DIAGNOSIS The traction control/active skid control system (TCL/ASC) is a system that has
added the cut valve and suction valve to the conventional ABS system. These
valves are used to control each of the road wheels independently. These differences
include sounds, sensations, and vehicle performance that owners and service
technicians who are not familiar with TCL/ASC may not be used to.
Some operational characteristics may seem to be malfunctions, but they are simply
signs of normal TCL/ASC operation. When diagnosing the TCL/ASC system, keep
these operational characteristics in mind. Inform the owner of the kind of
performance characteristics to expect from an TCL/ASC-equipped vehicle. TCL/ASC Diagnostic Trouble Code Detection Conditions TCL/ASC diagnostic trouble codes (TCL/ASC DTCs) are set under different
conditions, depending on the malfunction detected. Most TCL/ASC DTCs will only
be set during vehicle operation. Some TCL/ASC DTCs will also be set during the
TCL/ASC self-check immediatel
y after the en
gine is started.
NOTE: *: When the ASC is operating while the brake pedal is
depressed, the suction valve turns on and off according to
the brake fluid amount supplied to the buffer chamber.
2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor

When you check if an TCL/ASC DTC will be displayed again after the DTC has
been erased, you should duplicate the TCL/ASC DTC set conditions. Depending on
the detection timing and set conditions for the specific TCL/ASC DTC, you must
either drive the vehicle or turn the engine off and restart it. To set the proper
conditions for that DTC again, refer to "TCL/ASC DTC SET CONDITIONS
" for
each TCL/ASC DTC that you are trying to reset.
TCL/ASC DIAGNOSTIC TROUBLESHOOTING STRATEGY Use these steps to plan your diagnostic strategy. If you follow them carefully, you
will be sure that you have exhausted most of the possible ways to find an TCL/ASC
fault.
1. Gather information about the problem from the customer.
2. Verify that the condition described by the customer exists.
3. Check the vehicle for any TCL/ASC DTC.
4. If you cannot verify the condition and there are no TCL/ASC DTCs, the
malfunction is intermittent. Refer to HOW TO COPE WITH
INTERMITTENT MALFUNCTIONS
.
5. If you can verify the condition but there are no TCL/ASC DTCs, or the system
cannot communicate with the scan tool, check that the basic brake system is
operating properly.
If the basic brake system is not operating properly, refer to the BASIC BRAKE SYSTEM DIAGNOSIS
, .
If the basic brake system is operating properly, refer to SYMPTOM CHART
.
6. If there is an TCL/ASC DTC, record the number of the DTC, then erase the
DTC from the memory using the scan tool.
7. Duplicate the TCL/ASC DTC set conditions to see if the same TCL/ASC DTC
will set again.
If the same TCL/ASC DTC sets again or the TCL/ASC DTC cannot be
erased, perform the diagnostic procedures for the DTC. Refer to
DIAGNOSTIC TROUBLE CODE CHART
.
If you cannot
get the same TCL/ASC DTC to set a
gain, the malfunction is

2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor

intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS
.
DIAGNOSTIC FUNCTION ON-BOARD DIAGNOSTICS If the TCL/ASC-ECU detects any problem in the CAN communication line or the
ECUs, which the TCL/ASC-ECU is communicating with, it stores a diagnostic
trouble code. The DTCs have 58 items. The DTCs can be confirmed by connecting
scan tool MB991958 (MUT-III sub assembly). The stored DTCs are not erased
even after the ignition switch has been turned to the LOCK (OFF) position, or the
battery has been disconnected. The DTCs can be erased by operating scan tool
MB991958 (MUT-III sub assembly). HOW TO CONNECT THE SCAN TOOL (MUT-III) Required Special Tools:
MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V. C. I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A
1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 and the personal
computer.
CAUTION: To prevent damage to scan tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting scan tool
MB991958.

2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor

Fig. 31: Connecting Special Tool To Data Link Connector

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor

4. Connect special tool MB991910 to the V. C. I.
5. Connect special tool to the data link connector.
6. Turn the V. C. I. power switch to the "ON" position.
7. Start the MUT-III system on the personal computer. HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES Required Special Tools:
MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V. C. I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A
1. Connect scan tool MB991958 to the data link connec
tor.
NOTE: When the V.C.I. is energized, the V.C.I. indicator light
will be illuminated in a green color.
NOTE: Disconnect the scan tool in the reverse order of the
connecting sequence, making sure that the ignition
switch is at the "LOCK" (OFF) position.
CAUTION: To prevent damage to scan tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting scan tool
MB991958.
NOTE: If the battery voltage is low, diagnostic trouble codes will
not be set. Check the battery if scan tool MB991958 does
not display.

2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor

Fig. 32: Connecting Scan Tool MB991958 To Data Link Connector

2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System Select."
5. Choose "ABS/ASC/ASTC" and "STEERING ANGLE SENSOR" from the
"CHASSIS" tab.
6. Select "MITSUBISHI."
7. Select "Diagnostic Trouble Code".
8. If a DTC is set, it is shown.
9. Choose "DTC erase" to erase the DTC.
HOW TO READ DATA LIST Required Special Tools:
MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A
1. Connect scan tool MB991958 to the data link connec
tor.
CAUTION: To prevent damage to scan tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting scan tool
MB991958.

2004 Mitsubishi Endeavor LS
2004 BRAKES Traction Control, Active Skid Control System - Endeavor