2004 MITSUBISHI ENDEAVOR diagnosis

Fig. 66: Solenoid Valve And Moter Power Supply Circuit Diagram & Connector Identification

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
CIRCUIT OPERATION
The ABS-ECU contains the power supply circuit (terminal 19) for the pump
motor. The pump motor is energized by the motor relay, which is incorporated
in the ABS-ECU. The motor relay, which is incorporated in the ABS-ECU, is always off unless
the motor solenoid valve check is activated when the vehicle is started. The ABS-ECU activates the pump motor by turning on the ECU built-in motor
relay when the ABS is working.
ABS DTC SET CONDITIONS These diagnostic trouble codes will be set under the cases below.
DTC C1266: Motor system (seizure)
If the ABS-ECU determines that the pump motor is not running smoothly (i.e.
motor seizure) after the motor relay is turned off, this DTC will be set.
DTC C1273: Motor relay problem (stuck off) If the ABS-ECU determines that the motor is not running after the motor relay
is turned on, the ECU determines that the motor relay is stuck off, and sets this
DTC.
DTC C1274: Motor relay problem (stuck on) If the ABS-ECU determines that the motor is running after the motor relay is
turned off, the ECU determines that the motor relay is stuck on, and sets this
DTC. CAUTION: If there is any problem in the CAN bus lines, an
incorrect diagnostic trouble code may be set. Prior to
this diagnosis, diagnose the CAN bus lines.

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

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THESE DTCS ARE TO SET ARE:)
Current trouble
Damaged wiring harness or connector Malfunction of the hydraulic unit (integrated with ABS-ECU)
PAST TROUBLE
Carry out diagnosis with particular emphasis on connector(s) or wiring harness
in the power supply circuit (terminal 19) to the ABS-ECU motor or ground
circuit (terminal 18). For diagnosis procedures, refer to (Refer to HOW TO TREAT PAST TROUBLE
).
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.
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 Anti-Lock Braking System (ABS) - Endeavor

2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES: Go to Step 3 .
NO: Repair the CAN bus line (Refer to BASIC BRAKE SYSTEM
DIAGNOSIS
, or DIAGNOSIS < VEHICLES WITHOUT
ADVANCED AIR BAG
). Then go to Step 2.
STEP 2. Recheck for diagnostic trouble code.
1. Turn the ignition switch to the "ON" position.
2. Erase the DTC.
3. Turn the ignition switch to the "LOCK" (OFF) position.
4. Turn the ignition switch to the "ON" position.
5. Check if the DTC is set. 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 Anti-Lock Braking System (ABS) - Endeavor

Fig. 75: Solenoid Valve And Motor Power Supply Circuit Diagra
m
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
CIRCUIT OPERATION
The ABS-ECU contains the power supply circuit (terminal 1) for the solenoid
valve. The solenoid valve is energized by the valve relay, which is
incorporated in the ABS-ECU. The valve relay, which is incorporated in the ABS-ECU, is always energizing
the solenoid valve unless the initial check is in progress when the ignition
switch is turned on.
ABS DTC SET CONDITIONS
These diagnostic trouble codes will be set under the cases below.
DTC C1278 (Valve relay OFF failure) After the ABS-ECU turned on the valve relay, the solenoid valve is not
energized (valve relay OFF failure).
DTC C1278 (Valve relay ON failure) After the ABS-ECU turned off the valve relay, the solenoid valve still remains
energized (valve relay ON failure).
TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THESE DTCS ARE TO SET ARE:)
Current trouble
Damaged wiring harness or connector Malfunction of the hydraulic unit (integrated with ABS-ECU)
PAST TROUBLE Carr
y out dia
gnosis with
particular em
phasis on connector
(s) or wirin
g harness in CAUTION: If there is any problem in the CAN bus lines, an
incorrect diagnostic trouble code may be set. Prior to
this diagnosis, diagnose the CAN bus lines.

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

the power supply circuit (terminal 1) to the ABS-ECU solenoid valve or ground
circuit (terminal 2). 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.
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 Anti-Lock Braking System (ABS) - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES: Go to Step 3 .
NO: Repair the CAN bus line (Refer to TCL/ASC DIAGNOSIS , or
DIAGNOSIS < VEHICLES WITHOUT ADVANCED AIR BAG
).
Then go to Step 2.
STEP 2. Recheck for diagnostic trouble code.
1. Turn the ignition switch to the "ON" position.
2. Erase the DTC.
3. Turn the ignition switch to the "LOCK" (OFF) position.
4. Turn the ignition switch to the "ON" position.
5. Check if the DTC is set. 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 Anti-Lock Braking System (ABS) - Endeavor

Fig. 84: G
-Sensor Circuit Diagram < AWD >

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig. 85: Identifying Connectors A
-02, C
-04, C
-23, C
-214, C
-215

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
CIRCUIT OPERATION The G-sensor detects acceleration or deceleration, and converts it to a voltage signal
to send to the ABS-ECU (terminal 15). ABS DTC SET CONDITIONS These codes are set at the following cases:
DTC C1381:
G-sensor (out
put seized)
CAUTION: If there is any problem in the CAN bus lines, an
incorrect diagnostic trouble code may be set. Prior to
this diagnosis, diagnose the CAN bus lines.

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

When there is no variation in the G-sensor output voltage (G-sensor output
seized)
DTC C1382: G-sensor (low signal voltage problem) When the G-sensor output is lower than 0.5 V (Open circuit in G-sensor
circuit) When the ABS-ECU for AWD has installed incorrectly to the FWD vehicle
DTC C1383: G-sensor (high signal voltage problem) When the G-sensor output voltage is higher than 4.5 V (Open circuit in G-
sensor circuit)
TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THESE DTCS ARE TO SET ARE:)
Current trouble
Faulty ABS-ECU (for AWD) installation to the FWD vehicle Malfunction of the G-sensor Damaged wiring harness or connector Malfunction of the hydraulic unit (integrated with ABS-ECU)
PAST TROUBLE Carry out diagnosis with particular emphasis on connector(s) or wiring harness
between the ABS-ECU and the G-sensor. For diagnosis procedures, refer to HOW TO USE TROUBLESHOOTING/ INSPECTION SERVICE POINTS
.
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

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