Mitsubishi Outlander XL. Manual — part 1192
DIAGNOSIS
Required Special Tools:
⦆
MB991223: Harness Set
⦆
MB992006: Extra Fine Probe
⦆
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆
MB991824: V.C.I.
⦆
MB991827: M.U.T.-III USB Cable
⦆
MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line
ZC501967
AC404789
ZC5019680000
MB991824
MB991827
MB991910
Data link
connector
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.
(1)
Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.54Ab-5."
(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 line. (Refer to GROUP 54D,
STEP 2. Using scan tool MB991958 read the hands free
module diagnostic trouble code.
Check whether an hands free module DTCs are set or not.
(1)
Turn the ignition switch to the "ON" position.
(2)
Check for hands free module DTCs.
(3)
Turn the ignition switch to the "LOCK" (OFF) position.
Q:Is the check result satisfactory?
YES:
Go to Step 3.
NO:
Diagnose the hands free module (Refer to GROUP 52B,
Diagnostic Trouble Code P.52B-33).
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.
⦆
ETACS-ECU
DTC indicating a time-out error related to the hands free
module system
(1)
Turn the ignition switch to the "ON" position.
AIR CONDITIONING
55A-59
MANUAL A/C DIAGNOSIS
(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 Step 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 hands free module and the A/C-ECU (Refer to GROUP 00E,
Harness Connector Inspection P.00E-2.)
NO:
Replace the SRS-ECU. On completion, check that the
DTC is not reset.
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 hands free module and the A/C-ECU (Refer to GROUP 00E,
Harness Connector Inspection P.00E-2.)
NO:
Replace the A/C-ECU. On completion, check that the
DTC is not reset.
SYMPTOM CHART
M15502000099USA0000010000
During diagnosis, a DTC code associated with
other system may be set when the ignition switch
is turned on with connector(s) disconnected. On
completion, confirm all systems for DTC code(s).
If DTC code(s) are set, erase them all.
Symptom
Inspection
procedure
Reference
page
When the A/C is operation, temperature inside the passenger compartment
does not decrease (Cool air is not emitted).
1
Malfunction of the A/C power supply system.
2
The compressor does not work.
3
Blower fan and motor do not turn.
4
Blower air amount cannot be changed.
5
Outside/inside air changeover is not possible.
6
A/C outlet air temperature does not increase.
7
Air outlet vent cannot be changed.
8
55A-60
AIR CONDITIONING
MANUAL A/C DIAGNOSIS
Symptom
Inspection
procedure
Reference
page
Rear window defogger does not operate.
9
Blower motor power supply system.
10
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: When the A/C is Operation, Temperature Inside the
Passenger Compartment does not Decrease (Cool Air is not Emitted).
M15502000137USA0000010000
TECHNICAL DESCRIPTION (COMMENT)
The blower system or the compressor system may be
defective if there is no cool air coming from the vents.
TROUBLESHOOTING HINTS
⦆
Malfunction of blower motor
⦆
Malfunction of A/C-ECU
⦆
Malfunction of A/C compressor
DIAGNOSIS
STEP 1. Using scan tool MB991958, read the diagnostic
trouble code.
ZC501967
AC404789
ZC5019680000
MB991824
MB991827
MB991910
Data link
connector
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.
Check if an A/C-ECU DTC is set.
(1)
Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.54Ab-5."
(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:
Refer to Diagnostic Trouble Code Chart P.55A-8.
NO:
Go to Step 2.
STEP 2. Check that the blower motor operation when the
blower knob is moved to the "Maximum air volume"
position.
(1)
Turn the ignition switch to the "ON" position.
(2)
Turn the blower knob to the "Maximum air volume" position
AIR CONDITIONING
55A-61
MANUAL A/C DIAGNOSIS
Q:Does the blower motor operate when the blower knob is
moved to the "Maximum air volume" position?
YES:
Go to Step 3.
NO:
Refer to Inspection procedure 4 "Blower fan and motor
STEP 3. Check the rear window defogger and outside/inside
air selection damper control motor operation.
(1)
Turn the ignition switch to the "ON" position.
(2)
Check the operations of rear window defogger and outside/
inside air selection damper control motor.
Q:Do the defogger and outside/inside air selection damper
control motor work normally?
YES:
Refer to Inspection procedure 3 "The A/C compressor
NO:
Refer to Inspection procedure 2, "Malfunction of the
A/C-ECU power supply system P.55A-63."
55A-62
AIR CONDITIONING
MANUAL A/C DIAGNOSIS
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