Page 3409 of 4133

Here a selection can be made between:
1. fitted and
2. not fitted
AIR CONDITIONING (TEMPMATIC) NOTES ON FAULT MEMORY - AD83.30-P-2000-03GH
A particular numerical code is assigned to each fault (short-circuit, open-circuit, etc.) which distinguishes
between current faults and faults which occur temporarily.
When determining faults, the push-button control unit (N19) cannot always distinguish between short-circuit
and disconnected cables.
If no fault code is displayed, but there is a complaint, a tolerance deviation of components can exist. Since such
a deviation is not recorded by the fault memory, the appropriate test steps are to be checked with the socket box
and Multimeter.
AIR CONDITIONING (TEMPMATIC) DIAGNOSIS TOOLS - AD83.30-P-2000-04GH
Commercially available tools
AIR CONDITIONING (TEMPMATIC) TEST OF ELECTRICAL SYSTEM TOOLS - AD83.30-P-2000-06GH
Fig. 134: Identifying 35-Pin Socket Box (124 589 00 21 00)
Coding optionsSelection
Air conditioningfitted/not fitted
NumberDesignation
WH58.30-Z-1036-13AHandheld tester (HHT)651 100 01 99
WH58.30-Z-1037-13ATest cable (multiplexer)651 100 40 99
2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
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Page 3410 of 4133
Fig. 135: Identifying Fu sed Cable (124 589 37 63 00)
Fig. 136: Identifying Test Cable 14
-Pin (163 589 01 63 00)
Commercially available tools
AIR CONDITIONING (TEMPMAT IC) SOCKET BOX CONNECTION DIAGRAM - AD83.30-P-2000-07GH
NumberDesignation
WH58.30-Z-1001-09AMultimeter
2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
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Page 3411 of 4133

Fig. 137: Identifying Air Conditioning (Tempmatic) Socket Box Connection Diagram
AIR CONDITIONING (TEMPMATIC) DIAGNOSIS PREVIOUS KNOWLEDGE - AD83.30-P-2000GH
MODEL 163 with CODE (580) air conditioning or for USA, Tempmatic
Air conditioning system, location of components GF83.30-P-0003-
01GH
Survey of electrical wiring diagrams for air conditioning PE83.00-P-1100E
Connection and use of test equipment AD00.00-P-1000AZ
Notes on air conditioning (Tempmatic) (TAC) fault memory AD83.30-P-2000-
03GH
Pre-conditions for function check of air conditioning
(Tempmatic) (TAC)up to
30.11.99AD83.30-P-2000-
01GH
Pre-conditions for function check of air conditioning
(Tempmatic) (TAC)as of
01.12.99AD83.30-P-2000-
01GK
Variant coding, air conditioning (Tempmatic) (TAC) AD83.30-P-2000-
02GH
Socket box connection diagram, air conditioning
(Tempmatic) (TAC) AD83.30-P-2000-
07GH
Air conditioning (Tempmatic) (TAC) diagnostic tools AD83.30-P-2000-
04GH
Tools, testing electrical system of air conditioning
(Tempmatic) (TAC) AD83.30-P-2000-
06GH
2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
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Page 3412 of 4133

AIR CONDITIONING (TEMPMATIC) DIAGNOSIS OPERATIONAL CHECK - AD83.30-P-3000GH
MODEL 163 with CODE (580) air conditioning or for USA, Tempmatic
Air conditioning (Tempmatic)
(Tempmatic A/C) diagnosis,
previous knowledge
AD83.30-P-2000GH
Function check
Test step/Scope
of test Operation/Requirement Specified value Possible cause/ Remedy
1
Temperature selector on "white
zone" ( ) function switch
illuminated
Air from center level.AD83.30-P-6000-01GH
Air drying Air upwards.AD83.30-P-6000-02GH
Air distribution switch at 12 o'clockA/C compressor ON .
AD83.30-P-6000-03GH
AD83.30
-P-6000-04GH
AD83.30
-P-6000-05GH
AD83.30
-P-6000-06GH
AD83.30
-P-6000-07GH
AD83.30
-P-6000-08GH
AD83.30
-P-6000-09GH
2
Temperature selector on "white
zone" function switch
illuminatedAir downwards and
upwards.AD83.30-P-6000-08GH
Normal setting
in control mode A/C compressor ON .AD83.30-P-6000-09GH
Air distribution switch at 4 o'clock
Flow of temperature-
controlled air from
center level as well.
Coolant circulation
pump runs.
3
Temperature selector engaged on
"blue" function switch not
illuminatedAir from center level
(ambient air)AD83.30-P-6000-08GH
Normal mode
without heating
mode
A/C compressor OFF.
Air distribution switch at 9 o'clock
4
Temperature selector on "red" stop
function switch not
illuminatedHeated air
downwards, upwards
and from center level.
AD83.30-P-6000-08GH
Normal mode in
heating mode
Air distribution switch at 4 o'clockA/C compressor
OFF.
2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
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Page 3413 of 4133

AIR CONDITIONING (TAU) DIAGNOSIS FUNCTION CHECK ACTUAL VALUES - AD83.30-P-3001GH
MODEL 163 with CODE (580) Air conditioning or Tempmatic for USA
5
Recirculated air
mode function switch illuminated
Blower switch on stage 4Blower noise
increases significantly
Cables
Recirculated air
switch
Fresh
air/recirculated air
flap actuator motor
Air conditioning (TAU)
diagnosis previous
knowledge AD83.30-P-2000GH
Connect hand-held tester
(HHT), read out
diagnostic trouble code
memoryModel 163 up to 31.8.01AD00.00-P-2000-03C
Operational check
Test scope Operation /
Requirement Specification Possible cause / Remedy
01
Circuit 30 11-14 VWiring
Battery
02Ignition ON Operating temperature
approx. 80°CWiring
Temperature sensor
Coolant (B11/4)
All-activity module
(N10)
Engine temperature Start engine and warm up
to operating temperature.
03Ignition ON Season-dependent,
approx. 20° CWiring
Temperature sensor
Ambient air (B14)
All-activity module
(N10)
Outside temperature
04Ignition ON ONWiring
F1k21
Blower motor (M2)
All-activity module
(N10)
Blower power supply
relay (F1k21) Blower stage 4FROM
05Ignition ON ONWiring
F1k26
Auxiliary fan (M4) Auxiliary fan relay FROM
2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
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Page 3414 of 4133

AIR CONDITIONING (TAU) DIAGNOSTIC FAULT MEMORY - AD83.30-P-4000GH
MODEL 163 with CODE (580) Air conditioning or Tempmatic for USA
(F1k26) All-activity module
(N10)
08Ignition ON ONWiring
F1k19
Heating water
circulation pump
(M13)
All-activity module
(N10)
Heating water
circulation pump relay
(F1k19) FROM
09Start engine12 barAD83.30-P-6000-09GH
Refrigerant pressure illuminates
Blower stage 4
10Start engineONAD83.30-P-6000-08GH
A/C compressor (A9) illuminates
Blower stage 4FROMAll-activity module
(N10)
A9
11Ignition ON YESWiring
Control module Air
conditioning (N19)
All-activity module
(N10)
Air conditioning
request NO
Air conditioning (TAU)
diagnosis previous
knowledge
AD83.30-P-
2000GH
Connect hand-held tester
(HHT), read out
diagnostic trouble code
memory
Model 163 up to 31.8.01
When a control module's fault memory is
read out, all the faults stored in the control
module are displayed, which means that
fault codes that do not concern the system
that is currently being read out can also
appear.
AD00.00-P-
2000-03C
Fault memory
Fault code Possible cause Note Remedy
(no
communication
with HHT
possible)
Diagnostic cable AD54.21-P-
6000-02GH
2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
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Page 3415 of 4133

AIR CONDITIONING (TEMPMAT IC) TEST OF ELECTRICAL SYSTEM CIRCUIT 15 VOLTAGE SUPPLY - AD83.30-P-6000-
01GH
Fig. 138: Air Conditioning (Tem pmatic) Test Of Electrical System Circuit 15 Voltage Supply
AIR CONDITIONING (TEM PMATIC) TEST OF ELECTRICAL SYST EM CIRCUIT 31 GND - AD83.30-P-6000-02GH
Fig. 139: Air Conditioning (Tempmatic) Test Of Electrical System Circuit 31 GND
AIR CONDITIONING (TEMPM ATIC) TEST OF ELECTRICAL SYSTEM IN-CAR TEMPERA TURE SENSOR - AD83.30-P-
6000-03GH
Fig. 140: Air Conditioning (Tempmat ic) Test Of Electrical System In-Car Temperature Sensor
AIR CONDITIONING (TEMPMATIC) TEST OF ELECTRICAL SYSTEM ANTI-ICING TEM PERATURE SENSOR - AD83.30-
P-6000-04GH
No fault codeNo fault detectedIf there is a complaint in spite of this ?
Air conditioning (TAU) electrical system
testingAD83.30-P-
6000GH
B1232Refrigerant compressor
sensor (B12) AD83.30-P-
6000-09GH
B1419Electromagnetic clutch
(A9k1) Wiring
A9k1
2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
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Page 3416 of 4133
Fig. 141: Air Conditioning (Tempmatic ) Test Of Electrical System Anti-Icing Temperature Sensor
AIR CONDITIONING (TEMPMATIC) TEST OF ELECTRICAL SYSTEM TEMPERATURE SELECTOR CONTROL
VOLTAGE - AD 83.30-P-6000-05GH
Fig. 142: Air Conditioning (Tempmat ic) Test Of Electrical System Temperature Selector Control Voltage
AIR CONDITIONING (TEMPMATIC) TEST OF ELECTRICAL SYSTEM BLENDING AIR FLAP SERVO MOTOR
CONTROL VOLTAGE - AD83.30-P-6000-06GH
Fig. 143: Air Conditioning (Tempmat ic) Test Of Electrical System Blending Air Flap Servo Motor
Control Voltage
AIR CONDITIONING (TEMPMATIC) TEST OF ELECTRICAL SYSTEM BLENDING AIR FLAP SERVO MOTOR GND -
AD83.30-P-6000-07GH
2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:17 PMPage 172 © 2006 Mitchell Repair Information Company, LLC.