2004 MITSUBISHI ENDEAVOR ECU

2004 BRAKES
Anti-Lock Braking System (ABS) - Endeavor
GENERAL DESCRIPTION FEATURES The 4ABS ensures directional stability and control during hard braking.
This ABS uses a 4-sensor 4-channel system that controls all four wheels
independently of each other. The basic system is the same as that for the Lancer.
EBD (Electronic Brake-force Distribution system) control has been installed to
provide the ideal braking force for the rear wheels.
EBD CONTROL In ABS, electronic control is used so the rear wheel brake hydraulic pressure during
braking is regulated by rear wheel control solenoid valves in accordance with the
vehicle's rate of deceleration. The front and rear wheel slippages are calculated from
the signals received from the various wheel sensors. EBD control is a control
system which provides a high level of control for both vehicle braking force and
vehicle stability. The system has the following features:
To shorten the harness wires and enhance data transmission reliability,
communication with other ECU is performed over a CAN (Controller Area
Network). Fail-safe function ensures that safety is maintained. Diagnostic function provides improved serviceability. Because the system provides the optimum rear wheel braking force regardless
of vehicle load and the condition of the road surface, the system reduces the
required pedal depression force, particularly when the vehicle is heavily
loaded. Because the duty placed on the front brakes is reduced, the increases in pad
temperature can be controlled during front brake application to improve pad
wear.

2004 Mitsubishi Endeavor LS
2004 BRAKES Anti-Lock Braking System (ABS) - Endeavor


2004 Mitsubishi Endeavor LS
2004 BRAKES Anti-Lock Braking System (ABS) - Endeavor

Control valves such as the proportioning valve are not required.
CONSTRUCTION DIAGRAM Fig. 1: Locating Anti Lock Brake Components

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.NOTE: On vehicles with ASC, the ABS system is controlled by the
TCL/ASC-ECU. For the system construction, refer to
GENERAL INFORMATION
.

2004 Mitsubishi Endeavor LS
2004 BRAKES Anti-Lock Braking System (ABS) - Endeavor

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 ABS 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 ABS DTC.
4. If you cannot verify the condition and there are no ABS DTCs, the malfunction
is intermittent. Refer to HOW TO COPE WITH INTERMITTENT
MALFUNCTIONS
.
5. If you can verify the condition but there are no ABS 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 ABS DTC, record the number of the DTC, then erase the DTC
from the memory using the scan tool.
7. Duplicate the ABS DTC set conditions to see if the same ABS DTC will set
again.
If the same ABS DTC sets again or the ABS DTC cannot be erased,
perform the diagnostic procedures for the DTC. Refer to HOW TO DIAGNOSE THE CAN BUS LINE
.
If you cannot get the same ABS DTC to set again, the malfunction is
intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS
.
DIAGNOSTIC FUNCTION ON-BOARD DIAGNOSTICS If the ABS-ECU detects any problem in the CAN communication line or the ECUs,
which the ABS-ECU is communicating with, it stores a diagnostic trouble code.
The DTCs have 27 items. The DTCs can be confirmed by connecting scan tool
MB991958
(MUT-III sub assembl
y.) The stored DTCs are not erased even after the

2004 Mitsubishi Endeavor LS
2004 BRAKES Anti-Lock Braking System (ABS) - Endeavor

The amount of voltage generated at each wheel is determined by the clearance
between the ABS rotor teeth and the ABS sensor, and by the speed of rotation. Sends alternating current signals at frequencies which are proportional to the
rotation speeds of each wheel to the ABS electronic control unit (ABS-ECU). The ABS hydraulic unit modulates the amount of braking force individually
applied to each wheel cylinder.
ABS DTC SET CONDITIONS The ABS-ECU monitors voltage fluctuation in each ABS sensor circuit. If the ECU
detects short or open circuit in the circuit, it will set a diagnostic trouble code. TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THESE DTCS ARE TO SET ARE:)
Current trouble
Malfunction of the ABS sensor Damaged wiring harness or connector Malfunction of the hydraulic unit (integrated with ABS-ECU)
Past trouble
Carry out diagnosis with particular emphasis o connector(s) or wiring harness
in ABS sensor circuit. For diagnosis procedures, refer to HOW TO USE TROUBLESHOOTING/ INSPECTION SERVIC
).
DIAGNOSIS 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
MB991970: ABS Check Harness
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

2004 Mitsubishi Endeavor LS
2004 BRAKES Anti-Lock Braking System (ABS) - Endeavor

Connector

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. Start the engine.
3. Set scan tool MB991958 to the data reading mode, and check the data list
items by driving the vehicle.
Item 01 (DTC C1200 is set): Front right ABS sensor Item 02 (DTC C1205 is set): Front left ABS sensor Item 03 (DTC C1210 is set): Rear right ABS sensor Item 04 (DTC C1215 is set): Rear left ABS sensor
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the speedometer indication match the scan tool indication?
YES: It can be assumed that this malfunction is intermittent. Refer to
HOW TO COPE WITH INTERMITTENT MALFUNCTIONS
.
NO: Go to Step 4.
STEP 4. Measure the voltage at ABS-ECU connector A-02.
1. Disconnect the connector A-02, and connect special tool ABS Check
Harness (MB991970) to the wiring harness-side connector.
2. Turn the ignition switch to the "ON" position.
3. Measure the voltage between the relevant signal and ground terminals in
the ABS sensor circuit and body ground. It should be less than 1V.
DTC C1200 is set: Between signal terminal 9 and body ground, and
between ground terminal 10 and body ground DTC C1205 is set: Between signal terminal 26 and body ground, and
between ground terminal 16 and body ground DTC C1210 is set: Between signal terminal 11 and body ground, and between
ground terminal 17 and bod
y ground NOTE: Do not connect special tool ABS Check Harness
(MB991970) to the ABS-ECU.

2004 Mitsubishi Endeavor LS
2004 BRAKES Anti-Lock Braking System (ABS) - Endeavor

Fig. 15: Measuring Voltage At ABS
-ECU Connector A
-02
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Does the voltage measure 1 V or less?
YES: Go to Step 5.
NO (When the voltage between terminal 9 or 10 - and body ground
measures more than 1 V): Go to Step 7 .
NO (When the voltage between terminal 26 or 16 - and body ground
measures more than 1 V): Go to Step 9 .
NO (When the voltage between terminal 11 or 17 - and body ground
measures more than 1 V): Go to Step 11 .
NO (When the voltage between terminal 28 or 27 - and body ground
measures more than 1 V): Go to Step 13 .
STEP 5. Measure the resistance at ABS-ECU connector A-02.
1. Disconnect the connector A-02, and connect special tool ABS Check
Harness (MB991970) to the wiring harness-side connector.
2. Measure the resistance between the relevant signal and ground terminals
in the ABS sensor circuit and body ground. There should be no continuity.
DTC C1200 is set: Between signal terminal 9 and body ground, and
between ground terminal 10 and body ground DTC C1205 is set: Between signal terminal 26 and body ground, and
between ground terminal 16 and body ground DTC C1210 is set: Between signal terminal 11 and body ground, and
between ground terminal 17 and body ground DTC C1215 is set: Between signal terminal 28 and body ground, and between
ground terminal 27 and bod
y ground NOTE: Do not connect special tool ABS Check Harness
(MB991970) to the ABS-ECU.

2004 Mitsubishi Endeavor LS
2004 BRAKES Anti-Lock Braking System (ABS) - Endeavor

Fig. 16: Measuring Resistance At ABS
-ECU Connector A
-02
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

2004 Mitsubishi Endeavor LS
2004 BRAKES Anti-Lock Braking System (ABS) - Endeavor

Q: Does continuity exist?
YES (Continuity exists between terminal 9 or terminal 10 and body
ground): Go to Step 7 .
YES (Continuity exists between terminal 26 or terminal 16 and body
ground): Go to Step 9 .
YES (Continuity exists between terminal 11 or terminal 17 and body
ground): Go to Step 11 .
YES (Continuity exists between terminal 28 or terminal 27 and body
ground): Go to Step 13 .
NO: Go to Step 6.
STEP 6. Measure the resistance at the ABS-ECU connector A-02.
1. Disconnect the connector A-02, and connect special tool ABS Check
Harness (MB991970) to the wiring harness-side connector.
2. Measure the resistance between the ABS-ECU connector terminals.
DTC C1200 is set: Between terminal 9 and terminal 10 DTC C1205 is set: Between terminal 26 and terminal 16 DTC C1210 is set: Between terminal 11 and terminal 17 DTC C1215 is set: Between terminal 28 and terminal 27
Standard Value: 1.24 - 1.64 kohm NOTE: Do not connect special tool ABS Check Harness
(MB991970) to the ABS-ECU.

2004 Mitsubishi Endeavor LS
2004 BRAKES Anti-Lock Braking System (ABS) - Endeavor