Air Con W202 Part1
Content
Air Conditioning MB Model W202
.ก 081 906 9657
$%%&'()*+)' Mercedes Benz /) C Class Model W202
1*'/2$ 34+)ก567():
Benz C Class Model W202 !"#
! $ก"&'ก($ก !)
*+,
-ก./!"ก"&'
,$$*/ !"0120(
3 &4
! 54 "&
,& & 671$ &#(38
&8 6"4--,ก$ 92&
,:
;(!/!:1:<' *+,'
+=$;(!/!">
> "&กก(
54 "&6":' 60(3
!"
,*$
ก "&ก-? 2 0 92&0*ก"3-,ก$2 '& 4 (' A BC
,
71$ &ก !)
-ก./0
8!"&4,$$*/ *+,0!" 2
,-?
ก > N22 Air
Conditioning Pushbutton Control Unit #) ($ : 0
8 ,$$*/ '6C
ก : Fault (0#"&) !"
ก12 C3,$$*/2 '&
1. 2 )2$ก%$%%&91:;<2
1: A/C Compressor (:6*/)
2: Condenser (:&+/ )
3: Receiver/Drier (2 &/)
4: Expansion Valve (' '+/+2*
2()
5: Evaporator (:&+/&=)
A: 3) & */!"6":' 62(#4
(# ,-? Gas)
B: 3) & */!"6":' 62(#4
(# ,-?
+')
C: 3) & */!"6":' 62(0) (# ,-?
+')
D: 3) & */!"6":' 62(0) (# ,-? Gas)
3@ก59A535):
• 3) & */!":' 62(0) (# ,-? Gas) !"6
ก Evaporator (5)
,4ก A/C Compressor (1) (2 6":' 6
2(#4
*+,#
<-&(
Condenser (2)
• Condenser (2) !) !",$ &:' 6 *+,63) & */&=+
ก=
,-+"&# ,-?
ก*ก_# -?
+'
• 3) & */!"-?
+'
,4กก
#, 2*+,242:' 6>3ก2 '& Receiver/Drier (3)
• Expansion Valve (4)
,+2:' 62(3) & */+
!(!" *+,!) ก12:' 6&= C3 !" Evaporator (5) 3) & */
!"5 Expansion valve (4) *+ '
,6":' 62(0) *+,
,:&8-+"& # ,
ก
+'-?*ก_#65
Evaporator (5)
• 3) & */!":' 62(0) (# ,-? Gas) ก=
,4ก A/C Compressor (1) (2 6":' 62(#4
*+,#
<-&(
Condenser (2) BC
ก=
,-?'
''"&*$$"3<-&8
2(
(3:' 6&=!"<2 ก=
,6
ก Blower -b ก ;5 :&+/&=ก6 0 6>
*/0
8 c &
Air Conditioning MB Model W202
.ก 081 906 9657
2. 2& B3ก5<CD635ก5EF5(+)*G&
A = ก ;
กc &ก ก ;c &
B = ก ;&=
C = ก ;
D = +13-e2/-e2 -($(096(01 6 ก2-b6 Auto
E = +13-e2/-e2 -($*$$ Manual
1 = +13-e2/-e2 ก ;
กc &กc &
3 = +13-($!1;!
+6
ก:&+/&=
4 = +13-($!1;!
+6
ก!f"00/
5 = >
*/ก+
6 = +13-($!1;!
+6>
*/$
6a = >
*/$
7 = >
*/
(B &/ ' )
8 = +13-e2/-e2 >
*/+
8a = >
*/!
8b = >
*/+(
20 = ก
*/
21 = Blower
22 = Evaporator (:&+/&=)
23 = Heater Core (!f"00/)
24 = >
,$ &3)
ก5<CD7()635ก5EF5(+)*&G (6I$9A545J(K)):
6-e2*/ Blower (21)
,242 ก ;
กc &กc & C3&4ก($ +13 1 *+, ก ;
,4ก-b
5 ก
*/ (20) *+, :&+/&= (22) ก ;&=$
#'
,5 +13 (3) *+,ก<-&(
>
*/ก+
(5)
ก ;&=$
#'
,5 !f"00/ (23) *+,ก<-!
>
*/$ (6) >
*/
(B &/ ' ) (7) *+,>
*/+
8a *+, 8b
+13-e2/-e2 (1), (3), (4), (6) *+, (8)
,4ก:'$:692& -b6:'$:6c & (Air Conditioning Pushbutton
Control Unit) +13-e2/-e2"3
,4ก:'$:692&(096(01 ก2-b6 Auto 4ก:'$:692& manual ก2-b6
!1;!
+6
CJ5(C*/: 4-*#2
ก <+'"&
ก ;c &04 */!"*#2
*+,71$ &
0 (3 &4 .,!) :' 6
&= (Cooling Mode)
4- .,!) :' 6 (Heating Mode) *+, .,-ก01 (Normal Mode) 54 "& <6&ก0('&
,:($
,*0ก0
ก(0
ก -e2-e2
+13 (Flap) ! (3
Air Conditioning MB Model W202
.ก 081 906 9657
3. 2 )4%4/J&D$ 1:3ก5 (Air Conditioning Pushbutton Control Unit N22)
N22: Air Conditioning Pushbutton Control Unit
N22
,6"&4 2 *$$ !"021 0(3
&4 W202 4-B &6
,-?*ก8 *+, 4- ' 6
,-?6ก' *0
Function ก :'$:6ก=6ก( 2(
"3
• :'$:6ก !)
*/ <2 :' 6&=
92&# 0 6!" Set <'
• :'$:6ก !)
Duo Valve *+, Coolant Pump
• :'$:6 Fresh/Recirculated air Flap -e2 ก ;
กc &ก 6 $
+=ก & ก ;
6'"&c &&
2"&' (
,:'$:692&(091 6(01 6ก2-b6 Auto)
• :'$:6 !1;!
+6*/ (
,:'$:692&(091 6(01 6ก2-b6 Auto)
• :'$:6 Speed
Blower (
,:'$:692&(091 6(01 6ก2-b6 Auto)
• :'$:6ก !)
A/C Compressor
• :'$:6ก !)
(2+6<mmn :
• #
64+<-&(
ก+
ECU (Engine Control Unit) 6"ก >2>&$:
&0/
4. *11B 1SS5I (Sensors) *53;97@: A52U) A5C1% Air Conditioning Pushbutton Control Unit (N22)
Sensors
,6">*+, !"2
( "3
1. B10/1: Heater core temperature sensor: '(2.c461+6!"5 !f"00/ (Heater Core) *+,#
<-&(
N22
2. B10/4: In car temperature sensor: '(2.c461c &
92&# *+,#
<-&(
N22
3. B10/6: Evaporator temperature sensor: '(2.c461+6!"5 :&+/&= (Evaporator) *+,#
<-&(
N22
4. B10/5: Outside temperature sensor: '(2.c461 ก ;c &ก*+,#
<-&(
N22
5. B10/8: Coolant temperature sensor: '(2.c4613) +&=*+,#
<-&(
N22
6. B12 : Refrigerant pressure sensor: '(2*
2(3) & */*+,#
<-&(
N22
N22 @$+VG6GJD97: Sensors CD5)7W 3J5 XGJก1%45 /ICFJ 97:*31W <G V) *1W3<G97: 22 3E5 J5
2$JDYD&D$ 1:3ก5 <2(13/2กI*53; XZ:+CG<BG/ICFJ +)CG3[B( 5*5J97: Set <G B13)7W
1. #(
Duo valve -e2 -e2 -+&3) +&= !f"00/ #) ($:'$:6.c461 6!(3
#(
Coolant Pump !)
6"ก <+'"&
3) +&=#(
&2!)
Coolant Pump
Air Conditioning MB Model W202
.ก 081 906 9657
2. ก."ก2-b6 Auto: N22
,#(
Switchover valve block (Y11/3) -($+13 (Flap) $(
:($!1;!
+6
ก -($+13 (Flap) (3
,> ,$$ Vacuum (#4AA ก ;) :'$:6 Vacuum Element (' '+/+6*/)
3. ก."ก2-b6 Auto: N22
,#(
Blower regulator -($:' 6*
(2+6 (Blower) 0 6#c
.c461
92&# .,(3 > +6ก=
,*
&=+6ก=
,$ +
4. #(
A/C Compressor !)
&2!)
*+,#
64+<-&(
ก+
ECU (Engine Control Unit)
6"ก >2>&$:
&0/
5. #(
(2+6 :
!)
Step 1 Step 2 &2!)
4.1
2& B3*A5&C)363*11B 1SS5I (Sensors) *53;
B10/1: Heater core temperature sensor:
,'(2.c461+6!"5 !f"00/ (Heater Core) *+,#
<-&(
N22
B10/4: In car temperature sensor:
,'(2.c461c &
92&# *+,#
<-&(
N22
B10/6: Evaporator temperature sensor:
,'(2.c461+6!"5 :&+/&= (Evaporator) *+,#
<-&(
N22
B10/5: Outside temperature sensor:
,'(2.c461 ก ;c &ก*+,#
<-&(
N22
Air Conditioning MB Model W202
.ก 081 906 9657
B10/8: Coolant temperature sensor:
,'(2.c4613) +&=*+,#
<-&(
N22
B12: Refrigerant pressure sensor:
,'(2*
2(3) & */*+,#
<-&(
N22
4.2 2& B3 Switchover valve block &D$ Vacuum element
• Y11/3 = Switchover valve block:
,($#(AA .
ก N22 *+,
,> ,$$ #4AA ก ;:'$:6
Vacuum element (' '+/+6*/) -($!1;!
+6*/0 60
ก
• 38,39,41,44,45,46 = Vacuum Element (' '+/+6*/) : ' '+/+6*/"3
,-($+13 (Flap) -e2
6 ก &-e2 0 6*
242
#4AA ก ;!":'$:692& Y11/3 (*
242"36
ก-wx6!"&4! &
*+,0!6 !" Valve Block (36)
Air Conditioning MB Model W202
4.3
.ก 081 906 9657
2& B3*A5&C)3X1BDJ<aab5C)G54Z:3&D$ Coolant Pump
M4m2, M4m1 = Auxiliary Fan ((2+6<mmn :
)
ก59A535)63X1BDJ: (2+6
, on off C3&4ก($*
2(3) */ *+,/ .c4613) +&=
N22
,<2 $( #(AA .*
2(3) */
ก Refrigerant pressure sensor *+, .c4613) +&=
ก
Coolant temperature sensor 64+"3
,4ก) 6 -"&$!"&$ก($: !"ก=$ <' N22 *+, N22
,#(
(2
+6!)
Step 1 Step 2 0 6:' 66 ,#6
M13 = Coolant Pump: !) !"- wz63)
+&= <+5 !f"00/
%9 /2 : 54 "&'(
' ก# "3:
,-?-,9&>/ก($54 !"#
,$$*/&0/ !"021 0(3
&4 MB
C Class
! 54 "&& & 6!"
, ก# "34ก0
!"#2
ก !)
-ก./0
8
'6C
:) #,ก2 !(3
c { (
ก|{ *+,c { <!& *+,& & 6> :) 71$ &
&!"#2 !ก!
*+ '
<2 *0&
<ก=0 6 ! =' &(
6" $ก
28 ! >'&ก. *
! $2 '&
-?ก *$
-w:' 64 *+,*ก < $ก
(3 BC
,-?-,9&>/ก($54 0<54 "&&(
6":' 60(3
!"
, "&0 0!" 2 BC
,-?ก > N22 : 0
8 > : .c461 :
.c461:&+/&= : *
2(3) & */ }+} BC
<2 C
16 : *+,> N22 ก Fault Code (0
#"&) !"-?*$$ Current Temporary !"ก12 C3 ก($,$$*/ BC
# 6 <2 +,"&26 กก' 70
0#"& BC
,!) ! ! $' */&0/
! 6":' 6512-ก01!"-ก./0('< '6!(
3 ก +$
Fault Code (0#"&) !"
,<6>0#"&
1
(Temporary Fault) !C
<6:($' -b6:'$:6*/!"
ก2ก(&4!ก'( 6(
,!) ,<<2 6 ก6 &92&!" <64 +&
6%4/I41% .ก [9. 081 906 9657
.ก 081 906 9657
$%%&'()*+)' Mercedes Benz /) C Class Model W202
1*'/2$ 34+)ก567():
Benz C Class Model W202 !"#
! $ก"&'ก($ก !)
*+,
-ก./!"ก"&'
,$$*/ !"0120(
3 &4
! 54 "&
,& & 671$ &#(38
&8 6"4--,ก$ 92&
,:
;(!/!:1:<' *+,'
+=$;(!/!">
> "&กก(
54 "&6":' 60(3
!"
,*$
ก "&ก-? 2 0 92&0*ก"3-,ก$2 '& 4 (' A BC
,
71$ &ก !)
-ก./0
8!"&4,$$*/ *+,0!" 2
,-?
ก > N22 Air
Conditioning Pushbutton Control Unit #) ($ : 0
8 ,$$*/ '6C
ก : Fault (0#"&) !"
ก12 C3,$$*/2 '&
1. 2 )2$ก%$%%&91:;<2
1: A/C Compressor (:6*/)
2: Condenser (:&+/ )
3: Receiver/Drier (2 &/)
4: Expansion Valve (' '+/+2*
2()
5: Evaporator (:&+/&=)
A: 3) & */!"6":' 62(#4
(# ,-? Gas)
B: 3) & */!"6":' 62(#4
(# ,-?
+')
C: 3) & */!"6":' 62(0) (# ,-?
+')
D: 3) & */!"6":' 62(0) (# ,-? Gas)
3@ก59A535):
• 3) & */!":' 62(0) (# ,-? Gas) !"6
ก Evaporator (5)
,4ก A/C Compressor (1) (2 6":' 6
2(#4
*+,#
<-&(
Condenser (2)
• Condenser (2) !) !",$ &:' 6 *+,63) & */&=+
ก=
,-+"&# ,-?
ก*ก_# -?
+'
• 3) & */!"-?
+'
,4กก
#, 2*+,242:' 6>3ก2 '& Receiver/Drier (3)
• Expansion Valve (4)
,+2:' 62(3) & */+
!(!" *+,!) ก12:' 6&= C3 !" Evaporator (5) 3) & */
!"5 Expansion valve (4) *+ '
,6":' 62(0) *+,
,:&8-+"& # ,
ก
+'-?*ก_#65
Evaporator (5)
• 3) & */!":' 62(0) (# ,-? Gas) ก=
,4ก A/C Compressor (1) (2 6":' 62(#4
*+,#
<-&(
Condenser (2) BC
ก=
,-?'
''"&*$$"3<-&8
2(
(3:' 6&=!"<2 ก=
,6
ก Blower -b ก ;5 :&+/&=ก6 0 6>
*/0
8 c &
Air Conditioning MB Model W202
.ก 081 906 9657
2. 2& B3ก5<CD635ก5EF5(+)*G&
A = ก ;
กc &ก ก ;c &
B = ก ;&=
C = ก ;
D = +13-e2/-e2 -($(096(01 6 ก2-b6 Auto
E = +13-e2/-e2 -($*$$ Manual
1 = +13-e2/-e2 ก ;
กc &กc &
3 = +13-($!1;!
+6
ก:&+/&=
4 = +13-($!1;!
+6
ก!f"00/
5 = >
*/ก+
6 = +13-($!1;!
+6>
*/$
6a = >
*/$
7 = >
*/
(B &/ ' )
8 = +13-e2/-e2 >
*/+
8a = >
*/!
8b = >
*/+(
20 = ก
*/
21 = Blower
22 = Evaporator (:&+/&=)
23 = Heater Core (!f"00/)
24 = >
,$ &3)
ก5<CD7()635ก5EF5(+)*&G (6I$9A545J(K)):
6-e2*/ Blower (21)
,242 ก ;
กc &กc & C3&4ก($ +13 1 *+, ก ;
,4ก-b
5 ก
*/ (20) *+, :&+/&= (22) ก ;&=$
#'
,5 +13 (3) *+,ก<-&(
>
*/ก+
(5)
ก ;&=$
#'
,5 !f"00/ (23) *+,ก<-!
>
*/$ (6) >
*/
(B &/ ' ) (7) *+,>
*/+
8a *+, 8b
+13-e2/-e2 (1), (3), (4), (6) *+, (8)
,4ก:'$:692& -b6:'$:6c & (Air Conditioning Pushbutton
Control Unit) +13-e2/-e2"3
,4ก:'$:692&(096(01 ก2-b6 Auto 4ก:'$:692& manual ก2-b6
!1;!
+6
CJ5(C*/: 4-*#2
ก <+'"&
ก ;c &04 */!"*#2
*+,71$ &
0 (3 &4 .,!) :' 6
&= (Cooling Mode)
4- .,!) :' 6 (Heating Mode) *+, .,-ก01 (Normal Mode) 54 "& <6&ก0('&
,:($
,*0ก0
ก(0
ก -e2-e2
+13 (Flap) ! (3
Air Conditioning MB Model W202
.ก 081 906 9657
3. 2 )4%4/J&D$ 1:3ก5 (Air Conditioning Pushbutton Control Unit N22)
N22: Air Conditioning Pushbutton Control Unit
N22
,6"&4 2 *$$ !"021 0(3
&4 W202 4-B &6
,-?*ก8 *+, 4- ' 6
,-?6ก' *0
Function ก :'$:6ก=6ก( 2(
"3
• :'$:6ก !)
*/ <2 :' 6&=
92&# 0 6!" Set <'
• :'$:6ก !)
Duo Valve *+, Coolant Pump
• :'$:6 Fresh/Recirculated air Flap -e2 ก ;
กc &ก 6 $
+=ก & ก ;
6'"&c &&
2"&' (
,:'$:692&(091 6(01 6ก2-b6 Auto)
• :'$:6 !1;!
+6*/ (
,:'$:692&(091 6(01 6ก2-b6 Auto)
• :'$:6 Speed
Blower (
,:'$:692&(091 6(01 6ก2-b6 Auto)
• :'$:6ก !)
A/C Compressor
• :'$:6ก !)
(2+6<mmn :
• #
64+<-&(
ก+
ECU (Engine Control Unit) 6"ก >2>&$:
&0/
4. *11B 1SS5I (Sensors) *53;97@: A52U) A5C1% Air Conditioning Pushbutton Control Unit (N22)
Sensors
,6">*+, !"2
( "3
1. B10/1: Heater core temperature sensor: '(2.c461+6!"5 !f"00/ (Heater Core) *+,#
<-&(
N22
2. B10/4: In car temperature sensor: '(2.c461c &
92&# *+,#
<-&(
N22
3. B10/6: Evaporator temperature sensor: '(2.c461+6!"5 :&+/&= (Evaporator) *+,#
<-&(
N22
4. B10/5: Outside temperature sensor: '(2.c461 ก ;c &ก*+,#
<-&(
N22
5. B10/8: Coolant temperature sensor: '(2.c4613) +&=*+,#
<-&(
N22
6. B12 : Refrigerant pressure sensor: '(2*
2(3) & */*+,#
<-&(
N22
N22 @$+VG6GJD97: Sensors CD5)7W 3J5 XGJก1%45 /ICFJ 97:*31W <G V) *1W3<G97: 22 3E5 J5
2$JDYD&D$ 1:3ก5 <2(13/2กI*53; XZ:+CG<BG/ICFJ +)CG3[B( 5*5J97: Set <G B13)7W
1. #(
Duo valve -e2 -e2 -+&3) +&= !f"00/ #) ($:'$:6.c461 6!(3
#(
Coolant Pump !)
6"ก <+'"&
3) +&=#(
&2!)
Coolant Pump
Air Conditioning MB Model W202
.ก 081 906 9657
2. ก."ก2-b6 Auto: N22
,#(
Switchover valve block (Y11/3) -($+13 (Flap) $(
:($!1;!
+6
ก -($+13 (Flap) (3
,> ,$$ Vacuum (#4AA ก ;) :'$:6 Vacuum Element (' '+/+6*/)
3. ก."ก2-b6 Auto: N22
,#(
Blower regulator -($:' 6*
(2+6 (Blower) 0 6#c
.c461
92&# .,(3 > +6ก=
,*
&=+6ก=
,$ +
4. #(
A/C Compressor !)
&2!)
*+,#
64+<-&(
ก+
ECU (Engine Control Unit)
6"ก >2>&$:
&0/
5. #(
(2+6 :
!)
Step 1 Step 2 &2!)
4.1
2& B3*A5&C)363*11B 1SS5I (Sensors) *53;
B10/1: Heater core temperature sensor:
,'(2.c461+6!"5 !f"00/ (Heater Core) *+,#
<-&(
N22
B10/4: In car temperature sensor:
,'(2.c461c &
92&# *+,#
<-&(
N22
B10/6: Evaporator temperature sensor:
,'(2.c461+6!"5 :&+/&= (Evaporator) *+,#
<-&(
N22
B10/5: Outside temperature sensor:
,'(2.c461 ก ;c &ก*+,#
<-&(
N22
Air Conditioning MB Model W202
.ก 081 906 9657
B10/8: Coolant temperature sensor:
,'(2.c4613) +&=*+,#
<-&(
N22
B12: Refrigerant pressure sensor:
,'(2*
2(3) & */*+,#
<-&(
N22
4.2 2& B3 Switchover valve block &D$ Vacuum element
• Y11/3 = Switchover valve block:
,($#(AA .
ก N22 *+,
,> ,$$ #4AA ก ;:'$:6
Vacuum element (' '+/+6*/) -($!1;!
+6*/0 60
ก
• 38,39,41,44,45,46 = Vacuum Element (' '+/+6*/) : ' '+/+6*/"3
,-($+13 (Flap) -e2
6 ก &-e2 0 6*
242
#4AA ก ;!":'$:692& Y11/3 (*
242"36
ก-wx6!"&4! &
*+,0!6 !" Valve Block (36)
Air Conditioning MB Model W202
4.3
.ก 081 906 9657
2& B3*A5&C)3X1BDJ<aab5C)G54Z:3&D$ Coolant Pump
M4m2, M4m1 = Auxiliary Fan ((2+6<mmn :
)
ก59A535)63X1BDJ: (2+6
, on off C3&4ก($*
2(3) */ *+,/ .c4613) +&=
N22
,<2 $( #(AA .*
2(3) */
ก Refrigerant pressure sensor *+, .c4613) +&=
ก
Coolant temperature sensor 64+"3
,4ก) 6 -"&$!"&$ก($: !"ก=$ <' N22 *+, N22
,#(
(2
+6!)
Step 1 Step 2 0 6:' 66 ,#6
M13 = Coolant Pump: !) !"- wz63)
+&= <+5 !f"00/
%9 /2 : 54 "&'(
' ก# "3:
,-?-,9&>/ก($54 !"#
,$$*/&0/ !"021 0(3
&4 MB
C Class
! 54 "&& & 6!"
, ก# "34ก0
!"#2
ก !)
-ก./0
8
'6C
:) #,ก2 !(3
c { (
ก|{ *+,c { <!& *+,& & 6> :) 71$ &
&!"#2 !ก!
*+ '
<2 *0&
<ก=0 6 ! =' &(
6" $ก
28 ! >'&ก. *
! $2 '&
-?ก *$
-w:' 64 *+,*ก < $ก
(3 BC
,-?-,9&>/ก($54 0<54 "&&(
6":' 60(3
!"
, "&0 0!" 2 BC
,-?ก > N22 : 0
8 > : .c461 :
.c461:&+/&= : *
2(3) & */ }+} BC
<2 C
16 : *+,> N22 ก Fault Code (0
#"&) !"-?*$$ Current Temporary !"ก12 C3 ก($,$$*/ BC
# 6 <2 +,"&26 กก' 70
0#"& BC
,!) ! ! $' */&0/
! 6":' 6512-ก01!"-ก./0('< '6!(
3 ก +$
Fault Code (0#"&) !"
,<6>0#"&
1
(Temporary Fault) !C
<6:($' -b6:'$:6*/!"
ก2ก(&4!ก'( 6(
,!) ,<<2 6 ก6 &92&!" <64 +&
6%4/I41% .ก [9. 081 906 9657
