Mitsubishi Montero (2004+). Manual — part 541
RADIO WITH TAPE PLAYER AND CD PLAYER
TSB Revision
CHASSIS ELECTRICAL
54A-133
.
CIRCUIT OPERATION
Power is supplied from the battery directly to the
amplifier.
.
TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a faulty amplifier power supply
circuit system.
.
TROUBLESHOOTING HINTS
• Damaged wiring harness or connector.
• Damaged DIN cable.
• Malfunction of the amplifier.
• Malfunction of the radio and tape player.
DIAGNOSIS
Required Special Tool:
• MB991223: Harness set
STEP 1. Measure at amplifier connector G-19 in order to
check the battery circuit of power supply system to the
amplifier.
(1) Disconnect amplifier connector G-19, and measure at the
wiring harness side.
(2) Measure the voltage between terminal 6 and ground.
• The voltage should equal approximately 12 volts (bat-
tery positive voltage).
(3) Measure the voltage between terminal 16 and ground.
• The voltage should equal approximately 12 volts (bat-
tery positive voltage).
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Go to Step 4.
NO : Go to Step 2.
AC204170EN
CONNECTOR: D-27, D-125
D-125
D-27
AC204179
CONNECTOR : G-19
AM
AC204179
CONNECTOR : G-19
AV
HARNESS SIDE
3 2
1110
4
1312
1
9
5
6
1615
7
8
1817
14
AC204738 EQ
HARNESS SIDE: G-19
3 2
11 10
4
13 12
1
9
5
6
16 15
7
8
18 17
14
RADIO WITH TAPE PLAYER AND CD PLAYER
TSB Revision
CHASSIS ELECTRICAL
54A-134
STEP 2. Check amplifier connector G-19 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is amplifier connector G-19 in good condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. The speakers should sound.
STEP 3. Check the wiring harness between amplifier
connector G-19 (terminal 6 and 16) and the battery.
NOTE: Also check intermediate connector D-27 and D-125. If
intermediate connectors D-27 or D-125 are damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection
.
Q: Is the wiring harness between amplifier connector G-19
(terminal 6 and 16) and the battery in good condition?
YES : There is no action to be taken.
NO : Repair the wiring harness. The speakers should
sound.
AC204179
CONNECTOR : G-19
AV
HARNESS SIDE
3 2
1110
4
1312
1
9
5
6
1615
7
8
1817
14
AC204179
CONNECTOR : G-19
AV
HARNESS SIDE
3 2
1110
4
1312
1
9
5
6
1615
7
8
1817
14
AC204188CR
CONNECTORS: D-27, D-125
D-125
D-27
D-27
D-125
9
8
6 7
5
3 4
20
32
21
33
43
17 18
30
41
16
29
28
39 40
13
25
12
24
35 36
14
26
37
15
27
38
19
31
42
1
10
22
2
11
23
34
RADIO WITH TAPE PLAYER AND CD PLAYER
TSB Revision
CHASSIS ELECTRICAL
54A-135
STEP 4. Measure at amplifier connector G-19 in order to
check the ground circuit to the amplifier.
(1) Disconnect amplifier connector G-19, and measure at the
wiring harness side.
(2) Measure the resistance between terminal 7 and ground.
• The resistance should equal 2 ohms or less.
(3) Measure the resistance between terminal 17 and ground.
• The resistance should equal 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 7.
NO : Go to Step 5.
STEP 5. Check amplifier connector G-19 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is amplifier connector G-19 in good condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. The speakers should sound.
STEP 6. Check the wiring harness between amplifier
connector G-19 (terminal 7 and 17) and ground.
Q: Is the wiring harness between amplifier connector G-19
(terminal 7 and 17) and ground in good condition?
YES : There is no action to be taken.
NO : Repair the wiring harness. The speakers should
sound.
AC204179
CONNECTOR : G-19
AV
HARNESS SIDE
3 2
1110
4
1312
1
9
5
6
1615
7
8
1817
14
AC204738 EJ
HARNESS SIDE: G-19
3 2
11 10
4
13 12
1
9
5
6
16 15
7
8
18 17
14
AC204179
CONNECTOR : G-19
AV
HARNESS SIDE
3 2
1110
4
1312
1
9
5
6
1615
7
8
1817
14
AC204179
CONNECTOR : G-19
AV
HARNESS SIDE
3 2
1110
4
1312
1
9
5
6
1615
7
8
1817
14
RADIO WITH TAPE PLAYER AND CD PLAYER
TSB Revision
CHASSIS ELECTRICAL
54A-136
STEP 7. Check the DIN cable between amplifier and radio
and CD player.
Q: Is the DIN cable in good condition?
YES : Go to Step 8.
NO : Repair or replace the DIN cable. The speakers should
sound.
STEP 8. Replace the radio and CD player.
Q: Do the speakers sound normally?
YES : There is no action to be taken.
NO : Repair or replace the amplifier. The speakers should
sound.
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