MITSUBISHI ENDEAVOR 2004 Service Repair Manual

Fig. 92: Locating Connector C
-16
Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 93: Locating Connector C
-123

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

STEP 6. Check the mode selection damper control motor.

CAUTION: Do not apply battery voltage when the damper is
in the FACE or DEF position.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 94: Identifying Damper Control Motor Position

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Check the mode selection dam
per control motor b
y the followin
g procedures.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 95: Checking Mode Selection Damper Control Motor Procedure

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is the mode selection damper control motor in good condition?

YES:
Replace the A/C-ECU. Then go to Step 7.
NO:
Replace the mode selection damper control motor and potentiometer.
Then go to Step 7.
STEP 7. Recheck for diagnostic trouble code.

Check again if the DTC is set.
1. Connect scan tool MB991958 to the data link connec
tor

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 96: Connecting Scan Tool MB991958 To Data Link Connector

Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the check result satisfactory?

YES:
The procedure is complete.
NO:
Return to Step 1 .
DTC U1073: BUS OFF TROUBLE JUDGMENT DTC U1073 will be stored when the A/C-ECU ceases CAN communication (bus
off) and then resumes the communication when the ignition switch is turned to the
"LOCK" (OFF) position. TECHNICAL DESCRIPTION (COMMENT) The wiring harness wire or connectors may have loose, corroded, or damage
terminals, or terminals pushed back in the connector, or the A/C-ECU may be
defective. TROUBLESHOOTING HINTS
Defective connector(s) or wiring harness Malfunction of the A/C-ECU
DIAGNOSIS REQUIRED SPECIAL TOOLS:

MB991223: Harness Set
CAUTION: If DTC U1073 is set in the A/C-ECU, diagnose the
CAN main bus line.
CAUTION: Whenever the ECU is replaced, ensure that the
communication circuit is normal.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: V.C.I. MB991827: USB Cable MB991910: Main Harness A
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 (MUT-III), always
turn the ignition switch to the "LOCK" (OFF)
position before connecting or disconnecting
scan tool (MUT-III).

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 97: Connecting Scan Tool MB991958 To Data Link Connector

Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - 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 2.
NO:
Repair the CAN bus lines (Refer to
PRECAUTIONS ON HOW TO
REPAIR THE CAN BUS LINE
).
STEP 2. Recheck for diagnostic trouble code.

Check again if the DTC is set.
1. Connect scan tool MB991958 to the data link connec
tor

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 98: Connecting Scan Tool MB991958 To Data Link Connector

Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor