Mitsubishi Montero Sport (2004+). Manual — part 574
THEFT ALARM
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CHASSIS ELECTRICAL
54-283
STEP 4. Recheck for malfunction.
Q: Is a malfunction eliminated?
YES : This procedure is complete. (If no malfunctions are
found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Point
− How to
Cope with Intermittent Malfunction
.)
NO : Go to Step 1.
INSPECTION PROCEDURE 4: Panic Alarm Function does not Work.
.
TECHNICAL DESCRIPTION (COMMENT)
If the keyless entry system is normal, the
ETACS-ECU is defective.
.
TROUBLESHOOTING HINTS
• Malfunction of the ETACS-ECU
• Damaged harness wires or connectors
.
DIAGNOSIS
Required Special Tools:
• MB991223: Test Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B (Vehicles without
CAN communication system)
• MB991529: Diagnostic Trouble Code Check Harness
STEP 1. Check the keyless entry system.
Q: Does the keyless entry system work normally?
YES : Go to Step 2 <when using scan tool MB991958> or 3
<when using a voltmeter>.
NO : Solve the problem first. Refer to GROUP 42. Keyless
Entry System
− Diagnosis
.
THEFT ALARM
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CHASSIS ELECTRICAL
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STEP 2. Check the input signal (by using pulse check).
Check the input signals from the transmitter "PANIC" switch.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Check that the tone alarm of scan tool MB991958 sounds
when the input signal enters.
Q: Does the tone alarm of scan tool MB991958 sound when
the input signal enters?
YES : Replace the ETACS-ECU. The panic alarm should
work normally.
NO : Check the transmitter input signal circuit. Refer to
GROUP 42, Keyless Entry System
− Diagnosis
STEP 3. Check the input signal (by using a voltmeter).
Check the input signals from the transmitter "PANIC" switch.
(1) Use special tool MB991529 to connect a voltmeter between
ground terminal 4 or 5 and ETACS-ECU terminal 9 of the
data link connector.
(2) Check that the voltmeter indicator deflects once when the
input signal enters.
Q: Does the voltmeter indicator deflect?
YES : Replace the ETACS-ECU. The panic alarm should
work normally.
NO : Check the transmitter input signal circuit. Refer to
GROUP 42, Keyless Entry System
− Diagnosis
AK303629AB
MB991911
MB991827
MB991824
16-PIN
AC003527
GROUNDED TERMINAL
ETACS-ECU
TERMINAL
MB991529
AB
THEFT ALARM
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CHASSIS ELECTRICAL
54-285
INSPECTION PROCEDURE 5: Scan Tool MB991958 Communication is not Possible.
ETCS-ECU Power Supply and Scan Tool Communication Circuit
THEFT ALARM
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CHASSIS ELECTRICAL
54-286
.
CIRCUIT OPERATION
The ETACS-ECU receives switch signals from the
data link connector.
.
TECHNICAL DESCRIPTION (COMMENT)
The harness wires between the ETACS-ECU power
supply line or the ETACS-ECU and the data link con-
nector may be defective.
.
TROUBLESHOOTING HINTS
• Malfunction of the ETACS-ECU
• Damaged harness wires or connectors
.
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B (Vehicles without
CAN communication system)
• MB991529: Diagnostic Trouble Code Check Harness
AC004003AC
CONNECTOR: C-10
C-10
AC004002
AC
CONNECTOR: C-69
C-69 (B)
AC003445
JUNCTION BLOCK (REAR)
D-11
D-13
CONNECTORS: D-11, D-13
AC
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