Page 2145 of 3870
Fig. 100: Connecting Scan Tool MB991958 To Data Link Connector
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2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2146 of 3870
3.
STEP 3. Using scan tool MB991958, check for any diagnostic trouble code.Check if a DTC, which relates to CAN communication-linked systems below,
is set.
Combination meter
DTC indicating a time-out error related to the engine or automatic
transaxle control system ETACS-ECU
DTC indicating a time-out error related to the engine or automatic
transaxle control system
1. Turn the ignition switch to the "ON" position.
2. Check for a DTC related to the relevant system.
3. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?
YES:
Go to Step 5 .
NO:
Go to Ste
p 4.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2147 of 3870
Fig. 101: Connecting Scan Tool MB991958 To Data Link Connector
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2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2148 of 3870
4.
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set.
1. Turn the ignition switch to the "ON" position.
2. Check if the DTC is set.
3. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?
YES:
A poor connection, open circuit or other intermittent malfunction is
present in the lines between the powertrain control module and the A/C-
ECU (Refer to
HARNESS CONNECTOR INSPECTION
).
NO:
Replace the powertrain control module. On completion, check that
the DTC is not reset.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2149 of 3870
Fig. 102: Connecting Scan Tool MB991958 To Data Link Connector
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2004 Mitsubishi Endeavor LS
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Page 2150 of 3870
5.
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set.
1. Turn the ignition switch to the "ON" position.
2. Check if the DTC is set.
3. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?
YES:
A poor connection, open circuit or other intermittent malfunction is
present in the lines between the powertrain control module and the A/C-
ECU (Refer to
HARNESS CONNECTOR INSPECTION
).
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2151 of 3870
Fig. 103: Connecting Scan Tool MB991958 To Data Link Connector
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2004 Mitsubishi Endeavor LS
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Page 2152 of 3870

NO:
Replace the A/C-ECU. On completion, check that the DTC is not
reset.
DTC U1111: MULTI-CENTER DISPLAY UNIT (MIDDLE GRADE TYPE) TIME-OUT TROUBLE JUDGMENT The A/C-ECU receives signals from the multi-center display unit (middle grade
type). If the ECU cannot receive the signal related to the multi-center display unit,
DTC U1111 will be set. TECHNICAL DESCRIPTION (COMMENT)
CURRENT TROUBLE
Connector(s) or wiring harness in the CAN bus lines between the A/C-ECU
and the middle-grade multi-center display unit, the power supply system to the
display unit, the display unit itself, or the A/C-ECU may be defective.
PAST TROUBLE
When DTC U1111 is set as a past trouble, carry out diagnosis with particular
emphasis on connector(s) or wiring harness in the CAN bus lines between the
A/C-ECU and the middle-grade multi-center display unit, the power supply
system to the display unit. If the connectors and wiring are normal, and
obviously the ECU or the middle-grade multi-center display is the cause of the
trouble, replace the ECU or the middle-grade multi-center display. If in doubt,
do not replace the ECU or the display unit.
CAUTION: If DTC U1111 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.
NOTE: For a past trouble, you cannot find it by the scan tool CAN
bus diagnostics even if there is a failure in the CAN bus
lines. In this case, refer to HOW TO USE
TROUBLESHOOTING/ INSPECTION SERVICE POINTS
). and
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor