Technical Service Information
VOLKSWAGEN
09A/JF506E
NO REVERSE
COMPLAINT: Volkswagen vehicles equipped with the 09A/JF506E transaxle may exhibit a complaint of no
Reverse, or an intermittent no Reverse condition before or after overhaul. Note: This
complaint may be also related to cold weather.
CAUSE: The cause may be, the Low Timing Solenoid (N90-SV3) is mechanically stuck closed or the
Reverse Inhibit Valve is hung in the valve body, blocking the passage to the Low Reverse
Brake. Refer to Figures 3 and 4 for a partial hydraulic diagram of the operation of the Low
Timing Solenoid and how it functions when Reverse is engaged and when Reverse is
inhibited. Note: The N90 solenoid its energized if the vehicle is going Forward and Reverse
is selected to inhibit Reverse.
CORRECTION: See Figure 2 for the location of the Low Timing Solenoid and Figure 1 for the mechanical
function of the solenoid and replace as necessary. Note: If it is a cold condition, you may
want to put the solenoid in the freezer for a while before testing. If the solenoid tests good it
will be necessary to dis-assemble the valve body and check the Reverse Inhibit Valve. Refer
to Figures 5-8 for the exploded view of the valve body and location of the Reverse Inhibit
Valve. Clean and ensure that the valve is free before re-assembling the valve body.
SERVICE INFORMATION:
The Low Timing Solenoid (N90-SV3) can be purchased from most aftermarket suppliers.
LOW TIMING SOLENOID N90-SV3
OFF On
N90
N.O.
X 14-18 Ohms
X
Pilot Pressure X Pilot Pressure
Feed Feed
Summary: The Low Timing N90 Solenoid is a Normally Open On-Off Solenoid. When the Solenoid
is OFF Pilot Pressure is exhausted thru the areas shown above. When the Solenoid is ON, the
exhaust ports are closed. Copyright © 2013 ATSG
Figure 1
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AUTOMATIC TRANSMISSION SERVICE GROUP Page 1 of 8
Technical Service Information
VOLKSWAGEN SOLENOID IDENTIFICATION AND LOCATIONS
1 2 3 4
23
7
9
214124
JC7JP
23
23
01.09.03D
6
D
Volkswagen Solenoid Identification And Location
Manufacturer
1 2 3 4 5 6 7 8 9
VW Golf, GTI and Jetta N88 - SV1 N281-SV8 N89-SV2 N92-SV5 N283-SV10 N282-SV9 N93-SV6 N91-SV4 N90-SV3
Description Shift Reduction Shift Shift 2-4 Brake 2-4 Brake Line TCC Low Clutch
Solenoid Timing Solenoid Solenoid Solenoid Timing Pressure Solenoid Timing
"A" Solenoid "B" "C" Solenoid Solenoid Solenoid
Copyright © 2013 ATSG
Figure 2
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AUTOMATIC TRANSMISSION SERVICE GROUP Page 2 of 8
Technical Service Information
Reverse
"N90" Low Clutch
Timing Solenoid “OFF”
Low/Reverse
Brake
Pilot Reverse
Valve 2-4 Accumulator
Clutch
Switch
.033” Valve
x
Pressure
Regulator
Valve
Neutral Reverse
Shift Inhibit
Valve Valve
P R N D
Manual
Valve
Summary: The Low Timing N90 Solenoid is pulsed on for Low Clutch engagements, the 2-4 Clutch
application and for Line Pressure Cut-back, and for a Reverse Inhibit feature.
When the solenoid is OFF the solenoid provides an exhaust for the Pilot pressure it is fed and
none of the valves that it controls are stroked. Copyright © 2013 ATSG
Figure 3
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AUTOMATIC TRANSMISSION SERVICE GROUP Page 3 of 8
Technical Service Information
Reverse Inhibit
"N90" Low Clutch
Timing Solenoid “ON”
Low/Reverse
Brake
Pilot Reverse
Valve 2-4 Accumulator
Clutch
Switch
.033” Valve
x
Pressure
Regulator
Valve
Neutral Reverse
Shift Inhibit
Valve Valve
P R N D
Manual
Valve
Summary: The Low Timing N90 Solenoid is pulsed on for Low Clutch engagements, the 2-4 Clutch
application and for Line Pressure Cut-back, and for a Reverse Inhibit feature.
When the solenoid is ON the solenoid closes the exhaust ports and Pilot pressure strokes the Pressure
Regulator Valve allowing a pressure cut-back, it also strokes the 2-4 Accumulator Switch Valve in
preparation of a 2-4 clutch application, it provides pressure on the spring side of the Neutral
Shift Valve in preparation of a Low Clutch application and strokes the Reverse Inhibit Valve which
prevents the Low/Reverse Brake from applying. Copyright © 2013 ATSG
Figure 4
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AUTOMATIC TRANSMISSION SERVICE GROUP Page 4 of 8
Technical Service Information
VOLKSWAGEN JF506 VALVE BODY EXPLODED VIEW
2 23
1 6
6
2 7
3
61
2
8 5
4
26
3
0
22 25
1
.0
9
2
.0
6
J
4
3
C
D
1
7
2
J
4
P
2
5 24
5
23
9
D
11
4
12
13
10 27
14 3 28
18 29
19
17
16
15
20
5 30
23
31
21 62 4
23
2
D 5
See Legend In Figure 7 Copyright © 2013 ATSG
Figure 5
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Technical Service Information
VOLKSWAGEN JF506 VALVE BODY EXPLODED VIEW
32 64
33
63
0
1
.0
9
2
.0
1
J
4
3
C
D
1
7
2
J
4
P
23
34 D
35 12 11
36
5
37
38 39
60
2
40
5
6 5
42 41 15
4
3
23
21
23
49
D
43
48
44
46
45
47
See Legend In Figure 7
Copyright © 2013 ATSG
Figure 6
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Technical Service Information
50 VOLKSWAGEN JF506 VALVE BODY EXPLODED VIEW
51
52
26
53
25
59
58
54 57
55
56
1 VALVE BODY BRACKET 33 PRESSURE MODIFIER VALVE TRAIN
2 VALVE BODY BOLT, 37MM LENGTH 34 TORQUE CONVERTER PRESSURE REGULATOR VALVE TRAIN
3 NUT FOR VALVE BODY BOLT FROM BOTTOM 35 THROTTLE ACCUMULATOR VALVE "A" VALVE TRAIN
4 VALVE BODY BOLT, 67MM LENGTH 36 ACCUMULATOR CONTROL VALVE "A" VALVE TRAIN
5 VALVE BODY BOLT, 90MM LENGTH 37 HIGH CLUTCH ACCUMULATOR REGULATOR VALVE TRAIN
6 VALVE BODY BOLT, 22MM LENGTH 38 2-4 BRAKE CLUTCH ACCUMULATOR REGULATOR VALVE TRAIN
7 LINE PRESSURE SOLENOID (N93-SV6) 39 REDUCTION REDUCING VALVE TRAIN
8 LOW CLUTCH TIMING SOLENOID (N90-SV3) 40 REDUCTION TIMING VALVE TRAIN
9 2-4 BRAKE TIMING SOLENOID (N282-SV9) 41 LINE PRESSURE RELIEF BALL AND SPRING
10 2-4 BRAKE DUTY SOLENOID (N283-SV10) 42 PRESSURE REGULATOR VALVE TRAIN
11 SUB LOWER VALVE BODY CASTING 43 2-4 CLUTCH ACCUMULATOR REGULATOR SWITCH VALVE TRAIN
12 PILOT FILTER WITH "LEAF" SPRING 44 ACCUMULATOR CONTROL VALVE "B" VALVE TRAIN
13 SPACER PLATE "A" WITH GASKETS 45 HIGH CLUTCH ACCUMULATOR REGULATOR SWITCH VALVE
14 OIL BAFFLE 46 THROTTLE ACCUMULATOR "B" VALVE TRAIN
15 COIL SPRING LOADED FILTERS (2 REQUIRED) 47 HIGH CLUTCH ACCUMULATOR PISTON AND SPRING
16 TCC SOLENOID (N91-SV4) 48 LOW CLUTCH ACCUMULATOR PISTON AND SPRING
17 SHIFT SOLENOID "A" (N88-SV1) 49 SHIFT VALVE "C" VALVE TRAIN
18 REDUCTION TIMING SOLENOID (N281-SV8) 50 SHIFT VALVE "A" VALVE TRAIN
19 SHIFT SOLENOID "B" (N89-SV2) 51 TCC CONTROL VALVE TRAIN
20 SHIFT SOLENOID "C" (N92-SV5) 52 NEUTRAL SHIFT VALVE TRAIN
21 LOWER VALVE BODY CASTING 53 MANUAL SHIFT VALVE
22 MANUAL SHIFT VALVE 54 PILOT VALVE TRAIN
23 SPACER PLATE "B" (NO GASKETS) 55 ACCUMULATOR SWITCH VALVE TRAIN
24 INTERNAL VALVE BODY CASTING 56 NEUTRAL CONTROL VALVE TRAIN
25 PLASTIC CHECK BALL (.218" DIAMETER, 5 REQUIRED) 57 REVERSE INHIBIT VALVE TRAIN
26 STEEL CHECK BALL (.218" DIAMETER, 4 REQUIRED) 58 SHIFT VALVE "B" VALVE TRAIN
27 SPACER PLATE "C" UPPER GASKET (MAY BE BONDED) 59 FAILSAFE VALVE TRAIN
28 SPACER PLATE "C" 60 INTERNAL SOLENOID WIRE HARNESS CLIP
29 SPACER PLATE "C" LOWER GASKET (MAY BE BONDED) 61 INTERNAL SOLENOID WIRE HARNESS CLIP
30 PLASTIC CHECK BALL (.218" DIAMETER, 4 REQUIRED) 62 INTERNAL SPEED SENSOR WIRE HARNESS CLIP
31 UPPER VALVE BODY CASTING 63 INTERNAL SPEED SENSOR WIRE HARNESS CLIP
32 MODIFIER ACCUMULATOR VALVE TRAIN 64 VALVE BODY TO CASE BOLT, 90MM LONG (SILVER IN COLOR)
Copyright © 2013 ATSG
Figure 7
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Technical Service Information
VOLKSWAGEN SMALL PARTS AND CHECKBALL LOCATIONS
= Plastic Ball .218" Diameter
= Steel Ball .218" Diameter
"Leaf Spring"
Faces Down
Copyright © 2013 ATSG
Figure 8
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