Tech Article Title
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Author
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Date
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Unlocking the Secrets within the Climate Control Panel (2000)
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Mark Quinn
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2000
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Changing Degree Temperature DisplayPress and hold the
recirculation button. Then press the temperature up ("+") button to switch
between degrees Celsius & Fahrenheit on the Climate Control
Temperature and Instrument Panel Outside Temperature displays.
Accessing On-Board Diagnostic codesPress and hold the
recirculation button. Then press the manual flow control up arrow.
You should see a 1c. Press the temperature up ("+") or down ("-") buttons
to select a code number. Then press the recirculation button
again. The value should display. Press the temperature
up or down button again to display another code.
NOTE: Air Flow Motor (V 71) and Potentiometer (G 113) are not
installed in USA/Canada vehicles. Disregard values displayed for these
components.
Code |
Displayed Value |
1 |
System malfunction - displayed as a Diagnostic Trouble Code
(DTC), see
chart below |
2 |
Digital value of Interior Temperature Sensor, in
Headliner (G 86) |
3 |
Digital value of Interior Temperature Sensor, in
Instrument Panel (G 56) |
4 |
Digital value of Fresh Air Intake Duct Temperature
Sensor (G 89) |
5 |
Digital value of Outside Air (Ambient) Temperature
Sensor (G 17), front |
6 |
Digital value of Outside Air (Ambient) Temperature
Sensor |
7 |
Digital value of Ambient Temperature Sensor At Fresh
Air Blower (G 109) |
8 |
Digital value of Temperature Regulator Flap Motor
Potentiometer (G 92) |
9 |
Delta value of Temperature Regulator Flap |
10 |
Non-corrected specified value of Temperature
Regulator Flap |
11 |
Digital value of Central Flap Motor Potentiometer (G
112) |
12 |
Specified value of Central Flap |
13 |
Digital value of Footwell/Defroster Flap Motor
Potentiometer (G 114) |
14 |
Specified value of Footwell/Defroster Flap |
15 |
Digital value of Air Flow Flap Motor Potentiometer
(G 113) |
16 |
Specified value of Air Flow Flap |
17 |
Vehicle Speed (km/h) |
18 |
Actual Air Blower voltage (Volts) |
19 |
Specified Fresh Air Blower voltage (Volts) |
20 |
A/C Compressor (A/C Clutch) voltage (Volts) |
21 |
Number of low voltage occurrences,
non-transient |
22 |
Cycle condition of A/C Refrigerant High Pressure
Switch (F 118) |
23 |
Cyclings of the A/C Refrigerant High Pressure Switch
(F 118) |
24 |
Cyclings of the switches, absolute
non-fluctuating |
25 |
Analog/Digital value, Kick-Down Switch |
26 |
Analog/Digital value, Engine Coolant Temperature
(ECT) Warning Light |
27 |
Engine Speed (RPM) |
28 |
N/A |
29 |
A/C Compressor speed in rpm (Equals Engine Speed x
1.28) |
30 |
Software version |
31 |
N/A |
32 |
Potentiometer malfunction counter, Temperature
Regulator Flap |
33 |
Potentiometer malfunction counter, Central
Flap |
34 |
Potentiometer malfunction counter,
Footwell/Defroster Flap |
35 |
Potentiometer malfunction counter, Air Flow
Map |
36 |
Feedback value, cold end-stop, Temperature Regulator
Flap Motor Potentiometer (G 92) |
37 |
Feedback value, hot end-stop, Temperature Regulator
Flap Motor Potentiometer (G 92), max. stop |
38 |
Feedback value, cold end-stop, Central Flap Motor
Potentiometer (G 112) |
39 |
Feedback value, hot end-stop, Central Flap Motor
Potentiometer (G 112) |
40 |
Feedback value, cold end-stop, Footwell/Defroster
Flap Motor Potentiometer (G114) |
41 |
Feedback value, hot end-stop, Footwell/Defroster
Flap Motor Potentiometer (G114) |
42 |
Feedback value, cold end-stop, Air Flow Map Motor
Potentiometer (G 113) |
43 |
Feedback value, hot end-stop, Air Flow Map Motor
Potentiometer (G 113) |
44 |
Vehicle operation cycle counter |
45 |
Calculated interior temperature (internal software,
in digits) |
46 |
Outside (ambient) temperature, filtered, for
regulation (internal software) |
47 |
Outside (ambient) temperature, unfiltered, (internal
software, in deg C) |
48 |
Outside (ambient) temperature, unfiltered, (in
digits) |
49 |
Malfunction counter for speedometer (vehicle speed)
signal |
50 |
Standing time (in minutes) |
51 |
Engine Coolant Temperature (ECT) in deg C |
52 |
Graphics channel 1 - A/C compressor switch-off
conditions are identified by illuminated segments of the "88.8"
display. See
chart below. |
53 |
Graphics channel 2 - Climate system electrical
outputs are identified by illuminated segments of the "88.8"
display. See
chart below. |
54 |
Control characteristics |
55 |
Outside (ambient) temperature, in deg C or deg F
depending on setting on A/C control head |
56 |
Temperature in deg C, from Interior Temperature
Sensor, in Headliner (G 86) |
57 |
Temperature in deg C, from Interior Temperature
Sensor, in Instrument Panel (G 56) |
58 |
Temperature in deg C, from Fresh Air Intake Duct
Temperature Sensor (G 89) |
59 |
Temperature in deg C, from Outside Air (Ambient)
Temperature Sensor (G 17), front |
60 |
Temperature in deg C, from Ambient Temperature
Sensor At Fresh Air Blower (G 109) |
61 |
Software version (latest) |
86 |
Display Check (All Segments of Climate Control display light up |
Diagnostic Trouble Code Meanings
Diagnostic Trouble
Code (Sensor) |
Malfunction Description |
00.0 |
No malfunction
present |
02.1 (G86) |
Interior Temperature
Sensor, in Headliner, static open, *02.1 (see
below) |
02.2 |
Interior Temperature
Sensor, in Headliner, static short, see 02.1 |
02.3 |
Interior Temperature
Sensor, in Headliner, sporadic open |
02.4 |
Interior Temperature
Sensor, in Headliner, sporadic short |
03.1 (G56) |
Interior Temperature
Sensor, in Instrument Panel, static open, see 02.1 |
03.2 |
Interior Temperature
Sensor, in Instrument Panel, static short, see 02.1 |
03.3 |
Interior Temperature
Sensor, in Instrument Panel, sporadic open |
03.4 |
Interior Temperature
Sensor, in Instrument Panel, sporadic short |
04.1 (G89) |
Fresh Air Intake Duct
Temperature Sensor, static open, *04.1 (see
below) |
04.2 |
Fresh Air Intake Duct
Temperature Sensor, static short, see 04.1 |
04.3 |
Fresh Air Intake Duct
Temperature Sensor, sporadic open |
04.4 |
Fresh Air Intake Duct
Temperature Sensor, sporadic short |
05.1 (G17) |
Outside Air (Ambient)
Temperature Sensor, front, static open, *05.1 (see
below) |
05.2 |
Outside Air (Ambient)
Temperature Sensor, front, static short, see 05.1, *05.2 (see
below) |
05.3 |
Outside Air (Ambient)
Temperature Sensor, front, sporadic open |
05.4 |
Outside Air (Ambient)
Temperature Sensor, front, sporadic short |
06.1 (G110) |
Engine Coolant Temperature
(ECT), A/C static open, *06.1 (see
below) |
06.2 |
Engine Coolant Temperature
(ECT), A/C static short, see 06.1 |
06.3 |
Engine Coolant Temperature
(ECT), A/C sporadic open |
06.4 |
Engine Coolant Temperature
(ECT), A/C sporadic short |
07.1 (G109) |
Ambient Temperature Sensor
at Fresh Air Blower, static open, *07.1 (see
below) |
07.2 |
Ambient Temperature Sensor
at Fresh Air Blower, static short, see 07.1 |
07.3 |
Ambient Temperature Sensor
at Fresh Air Blower, sporadic open |
07.4 |
Ambient Temperature Sensor
at Fresh Air Blower, sporadic short |
08.1 (G92) |
Temperature Regulator Flap
Motor Potentiometer, static open, *08.1 (see
below) |
08.2 |
Temperature Regulator Flap
Motor Potentiometer, static short, see 08.1 |
08.3 |
Temperature Regulator Flap
Motor Potentiometer, sporadic open |
08.4 |
Temperature Regulator Flap
Motor Potentiometer, sporadic short |
08.5 |
Temperature Regulator Flap,
static block, *08.5 (see
below) |
08.6 |
Temperature Regulator Flap
Motor Potentiometer, malfunction |
08.7 |
Temperature Regulator Flap,
sporadic block |
11.1 (G112) |
Central Flap Motor
Potentiometer, static open, *11.1 (see
below) |
11.2 |
Central Flap Motor
Potentiometer, static short, see 11.1 |
11.3 |
Central Flap Motor
Potentiometer, sporadic open |
11.4 |
Central Flap Motor
Potentiometer, sporadic short |
11.5 |
Central Flap, static block,
*11.5 (see
below) |
11.6 |
Central Flap Motor
Potentiometer, malfunction |
11.7 |
Central Flap, sporadic
block |
13.1 (G114) |
Footwell/Defroster Flap
Motor Potentiometer, static open, *13.1 (see
below) |
13.2 |
Footwell/Defroster Flap
Motor Potentiometer, static short, see 13.1 |
13.3 |
Footwell/Defroster Flap
Motor Potentiometer, sporadic open |
13.4 |
Footwell/Defroster Flap
Motor Potentiometer, sporadic short |
13.5 |
Footwell/Defroster Flap,
static block, *13.5 (see
below) |
13.6 |
Footwell/Defroster Flap
Motor Potentiometer, malfunction |
13.7 |
Footwell/Defroster Flap,
sporadic block |
15.1 (G113) |
Air Flow Flap Motor
Potentiometer, static open, *15.1 (see
below) |
15.2 |
Air Flow Flap Motor
Potentiometer, static short, see 15.1 |
15.3 |
Air Flow Flap Motor
Potentiometer, sporadic open |
15.4 |
Air Flow Flap Motor
Potentiometer, sporadic short |
15.5 |
Air Flow Flap, static
block, see *15.5 (see
below) |
15.6 |
Air Flow Flap Motor
Potentiometer, malfunction |
15.7 |
Air Flow Flap, sporadic
block |
17.0 |
Vehicle Speed Signal
faulty |
18.1 |
Fresh air blower voltage,
static |
18.3 |
Fresh air blower voltage,
sporadic |
20.1 |
A/C compressor voltage not
OK - static, *20.1 (see
below) |
20.3 |
A/C compressor voltage not
OK - sporadic |
22.1 (F118) |
A/C Refrigerant High
Pressure Switch, static open, *22.1 (see
below) |
22.3 |
A/C Refrigerant High
Pressure Switch, sporadic open |
22.5 |
A/C Refrigerant High
Pressure Switch, 120X open, *22.5 (see
below) |
29.1 |
Belt slip detection "soft",
static |
29.2 |
Belt slip detection "hard",
static |
29.3 |
Belt slip detection "soft",
sporadic |
29.4 |
Belt slip detection "hard",
sporadic |
Diagnostic
Trouble Code Notes:
*02.1 |
Digital default value of
128 is programmed if sensor fails |
*04.1 |
Value supplied by Temp.
Sensor is used if sensor fails |
*05.1 |
Value supplied by Temp.
Sensor is used if sensor fails |
*05.2 |
Digital default value of
128 is programmed if sensors G89 & G17 both fail |
*06.1 |
Engine Coolant Temperature
is calculated is sensor should fail or is not installed; diagnosis
occurs only above 0 degrees Celsius |
*07.1 |
Programmed corrective value
= 0 |
*08.1 |
Temperature Regulator Flap
Motor will no longer be controlled automatically; manual adjustment
only |
*08.5 |
Motor is cycled; software
attempts to eliminate block |
*11.1 |
Central Flap Motor will no
longer be controlled automatically; manual adjustment
only |
*11.5 |
Motor is cycled; software
attempts to eliminate block |
*13.1 |
Footwell/Defroster Flap
Motor will no longer be controlled automatically; manual adjustment
only |
*13.5 |
Motor is cycled; software
attempts to eliminate block |
*15.1 |
Digital value is internally
programmed for limp-home mode |
*15.5 |
Motor is cycled; software
attempts to eliminate block |
*20.1 |
Compressor remains off
until voltage is greater than 10.8V for at least 25
seconds |
*22.1 |
Compressor remains off
until switch closes |
*22.5 |
Compressor re-engagement
circuit, VAG 1551 Scan Tool
function |
OBD Channel 52 - A/C Compressor switch-off
codes
If an A/C compressor switch-off condition exists, a segment of the
"88.8" display, indicated below as an alpha-numeric
code, will illuminate.
Segment |
Condition |
a1 |
Slippage or blockage, A/C Refrigerant
High Pressure Switch, 120x off |
b1 |
Engine Speed (RPM) less than 200 -
500 |
c1 |
Engine Speed (RPM) greater than
6000 |
d1 |
Engine Speed (RPM) greater than
6000 |
e1 |
System function OK |
f1 |
System function OK |
a2 |
A/C manually switched off (A/C standby
canceled) |
b2 |
low voltage |
c2 |
Kick-down switch, compressor off for
12secs max. |
d2 |
Engine Coolant Temperature
(ECT) warning light switched |
e2 |
A/C Refrigerant Low
Pressure Switch (F73) |
f2 |
A/C Refrigerant High
Pressure Switch (F118) |
a3 |
ECON mode
selected |
b3 |
OFF selected |
c3 |
Outside (ambient)
temperature too low |
d3 |
Engine management system
(compressor will remain off for 3 -12 seconds) |
e3 |
High pressure occurrences
more than 30 times |
f3 |
Ambient Temperature Sensor
at Fresh Air Blower (G109) less than 27 degF (-3 degC) |
g1,g2,g3 |
System function OK
(g1+g2+g3 must illuminate simultaneously to indicate system is
OK) |
Decimal Point
Lit |
A/C compressor ON |
Decimal Point
Unlit |
A/C compressor
OFF |
OBD Channel 53 - Climate system electrical output
codes
When a NO system electrical output is activated, a segment of the
"88.8" display, indicated below as an alpha-numeric
code, will illuminate. The decimal point in the "88.8" display will not illuminate in this channel.
Segment |
Condition |
a1 |
Fan for interior
temperature sensor |
b1 |
Fresh air/recirculation
flap closed (recirculation mode) |
c1 |
Heater valve
closed |
d1 |
Bi-directional wiring
harness |
e1 |
A/C compressor
ON |
f1 |
coolant fan first speed
ON |
a2 |
Air flow flap
open |
b2 |
Air flow flap
open |
c2 |
Air flow flap
closed |
d2 |
Footwell/Defroster flap in
"Footwell" position |
e2 |
Footwell/Defroster flap in
"Footwell" position |
f2 |
Footwell/Defroster flap in
"Defroster" position |
a3 |
Central flap in "instrument
panel outlet" position |
b3 |
Central flap in "instrument panel
outlet" position |
c3 |
Central flap in "footwell
outlet/defrost" position |
d3 |
Temperature flap in "cold
air" position |
e3 |
Temperature flap in "cold
air" position |
f3 |
Temperature flap in "warm
air" position |
g1,g2,g3 |
System function OK (g1+g2+g3 must
illuminate simultaneously to indicate system is
OK) |
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