Mitsubishi Montero Sport (2004+). Manual — part 578
THEFT ALARM
TSB Revision
CHASSIS ELECTRICAL
54-299
.
CIRCUIT OPERATION
The ETACS-ECU receives the input signal from the
hood switch, and then judges the operation of each
function.
.
TECHNICAL DESCRIPTION (COMMENT)
The hood switch input signal is used for judging the
operation of the theft-alarm function, so if there is a
malfunction, these functions may not operate cor-
rectly.
• Malfunction of the hood switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
.
DIAGNOSIS
Required Special Tools:
• MB991223: Test Harness Set
• MB991529: Diagnostic Trouble Code Check Harness
STEP 1. Check the hood switch.
(1) Remove the hood switch.
(2) Check for continuity between the hood switch.
Q: Is hood switch in good condition?
YES : Go to Step 2.
NO : Replace the hood switch.
AC003530
CONNECTOR: C-85
AC
C-85
AC003531
CONNECTOR: D-26
JUNCTION BLOCK (REAR)
AC
D-26 (B)
SWITCH
POSITION
TESTER
CONNECTION
SPECIFIED
CONDITION
Hood switch
unpressed
1
− 2
Less than 2 ohms
Hood switch
depressed
1
− 2
Open circuit
AC003759
1
2
VIEW A
A
AB
THEFT ALARM
TSB Revision
CHASSIS ELECTRICAL
54-300
STEP 2. Check hood switch connector A-94 and
ETACS-ECU connector D-26 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are hood switch connector A-94 and ETACS-ECU
connector D-26 in good condition?
YES : Go to Step 3.
NO : Repair or replace them. Refer to GROUP 00E,
Harness Connector Inspection
.
STEP 3. Check the harness wires between hood switch
connector A-94 (terminal No.1) and ETACS-ECU connector
D-26 (terminal No.31) for damage.
AC201913
1
2
CONNECTOR: A-94
AB
COMPONENT
SIDE
A-94 (B)
AC201902
1
2
8 7
4
10
5
11
12
6
9
3
CONNECTOR: D-26
AB
COMPONENT SIDE
JUNCTION BLOCK (REAR)
21
22
23
24
25
26
27
28
29
30
31
32
D-26 (B)
AC201913
1
2
CONNECTOR: A-94
AB
COMPONENT
SIDE
A-94 (B)
AC201902
1
2
8 7
4
10
5
11
12
6
9
3
CONNECTOR: D-26
AB
COMPONENT SIDE
JUNCTION BLOCK (REAR)
21
22
23
24
25
26
27
28
29
30
31
32
D-26 (B)
THEFT ALARM
TSB Revision
CHASSIS ELECTRICAL
54-301
NOTE: After checking intermediate connector C-85, check the
wires. If intermediate connector C-85 is damaged, repair or
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion
.
Q: Are the harness wires between hood switch connector
A-94 (terminal No.1) and ETACS-ECU connector D-26
(terminal No.31) in good condition?
YES : Go to Step 4.
NO : Repair or replace them. Refer to GROUP 00E,
Harness Connector Inspection
.
STEP 4. Check the harness wires between hood switch
connector A-94 (terminal No.2) and ground.
NOTE: After checking joint connector (5) C-14, check the
wires. If joint connector (5) C-14 is damaged, repair or replace
it. Refer to GROUP 00E, Harness Connector Inspection
.
Q: Are the harness wires between hood switch connector
A-94 (terminal No.2) and ground in good condition?
YES : Go to Step 5.
NO : Repair or replace them. Refer to GROUP 00E,
Harness Connector Inspection
.
AC201907
11
4
3
9
8
10
5 6
2
1
7
CONNECTOR: C-85
AB
C-85
AC201913
1
2
CONNECTOR: A-94
AB
COMPONENT
SIDE
A-94 (B)
AC201914
9 10
8
6 7
31 32
30
29
18 19 20 21
5
4
2
1
3
27
26
24
23
25
12 13 14 15 16 17
28
11
22
33
CONNECTOR: C-14
AB
C-14
THEFT ALARM
TSB Revision
CHASSIS ELECTRICAL
54-302
STEP 5. 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 8: Check the Circuit (Power Supply Line) from the Battery to the
ETACS-ECU.
ETACS-ECU'S Battery Circuit
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