Mitsubishi Montero (2004+). Manual — part 596
REAR AIR CONDITIONING DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-27
STEP 6. Measure the resistance at rear heater control unit
connector E-01 <vehicles with rear heater>, rear cooler
control unit connector E-09 <vehicles with rear cooler> or
rear A/C control unit connector E-20 <vehicles with rear
A/C>.
(1) Disconnect rear heater control unit connector E-01
<vehicles with rear heater>, rear cooler control unit
connector E-09 <vehicles with rear cooler> or rear A/C
control unit connector E-20 <vehicles with rear A/C>, and
measure at the wiring harness side.
(2) Measure the resistance between terminal 2 and ground.
• The measured value should be 2 ohms or less.
Q: Does the measured resistance value correspond with
this range?
YES : Replace the rear heater control unit <vehicles with
rear heater>, rear cooler control unit <vehicles with
rear cooler> or rear A/C control unit <vehicles with
rear A/C>, and check that the rear air conditioning
works normally.
NO : Go to Step 7.
AC204194
CONNECTORS : E-01, E-09, E-20
AN
E-01,
E-09,
E-20
E-01 <VEHICLES WITH REAR HEATER>
E-09 <VEHICLES WITH REAR COOLER>
E-20 <VEHICLES WITH REAR A/C>
HARNESS SIDE
7
8
3
10 9
2
4
11
1312
5
14
6
1
AC205150
7
8
3
10 9
2
4
11
1312
5
14
6
1
AB
CONNECTOR E-01, E-09, E-20
(HARNESS SIDE)
REAR AIR CONDITIONING DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-28
STEP 7. Check the wiring harness between rear heater
control unit connector E-01 (terminal 2) <vehicles with rear
heater>, rear cooler control unit connector E-09 (terminal
2) <vehicles with rear cooler> or rear A/C control unit
connector E-20 (terminal 2) <vehicles with rear A/C> and
the ground.
NOTE: Also check joint connector (8) connectors D-30. If joint
connector (8) connectors D-30 is damaged, repair or replace
the connector as described in GROUP 00E, Harness Connec-
tor Inspection
.
Q: Is the wiring harness between rear heater control unit
connector E-01 (terminal 2) <vehicles with rear heater>,
rear cooler control unit connector E-09 (terminal 2)
<vehicles with rear cooler> or rear A/C control unit
connector E-20 (terminal 2) <vehicles with rear A/C> and
the ground in good condition?
YES : Replace the rear heater control unit connector E-01
<vehicles with rear heater>, rear cooler control unit
connector E-09 <vehicles with rear cooler> or rear
A/C control unit connector E-20 <vehicles with rear
A/C>, and check that the rear air conditioning works
normally.
NO : Repair the wiring harness. Check that the rear air
conditioning works normally.
AC204194
CONNECTORS : E-01, E-09, E-20
AN
E-01,
E-09,
E-20
E-01 <VEHICLES WITH REAR HEATER>
E-09 <VEHICLES WITH REAR COOLER>
E-20 <VEHICLES WITH REAR A/C>
HARNESS SIDE
7
8
3
10 9
2
4
11
1312
5
14
6
1
AC204170
CONNECTOR : D-30
AJ
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
REAR AIR CONDITIONING DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-29
INSPECTION PROCEDURE 2: Rear Air Conditioning Outlet Air Temperature does not Increase
<Vehicles with Rear Heater>
Air Mixing Damper Control Motor and Potentiometer Circuit
REAR AIR CONDITIONING DIAGNOSIS
TSB Revision
HEATER, AIR CONDITIONING AND VENTILATION
55A-30
DIAGNOSIS
STEP 1. Check the rear heater switch (temperature control
switch).
Connect the tester between the connector terminal number 3
and number 5, between the terminal number 5 and number 13
and make sure that the resistance value changes slowly within
the standard value.
Standard value: 0
− 3 kΩ
Q: Is the check result normal?
YES : Go to Step 2.
NO : Replace the rear air-conditioner switch.
AC204170
CONNECTOR : D-30
BC
AC204171
CONNECTOR : D-112
AU
AC204176
CONNECTORS : E-01, E-06, E-12
BP
E-12
E-01
E-06
AC204175
CONNECTOR : E-21
AJ
AC204179
CONNECTORS : G-23, G-25
AZ
G-23
G-25
AC204698 AT
G-25-1
G-25-2
CONNECTORS : G-25-1, G-25-2
AC205161
1
7
2
8
10 11
5
13
6
14
12
4
9
3
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