Checking solenoid valves whilst driving — VW

The solenoid valves can be checked whilst driving via "Read measured value block 08"; "Display group number 004". A second mechanic is required for the read out whilst driving.

Only the first three valves select gears

The table shows the solenoid valves -N88-, -N89- and -N90- as activated in each selector lever position. These solenoid valves control the switching valves to the relevant gears.
The solenoid valve -N91- activates the lock-up clutch modulation valve and is not covered here.
The solenoid valves -N92- and -N94- are supplementary valves which affect selection changes and are only controlled during gear changes and displayed in zones 5 and 6.
All solenoid valves are checked via self-diagnosis => Interrogating fault memory, Page
01-38
.
When checking also observe the "Switch element position", this is where you can find which clutches or brakes are active.

=> Switch element positions; Repair group 37
Switch element positions

V.A.G 1551 display zone 1 has 6 characters (0000 00) and is read as follows:

Display on · Display zone 1:
V.A.G 1551 · Display 1 · Display 2 · Display 3 · Display 4 · Display 5 · Display 6
Solenoid valve 1 · Solenoid valve 2 · Solenoid valve 3 · Solenoid valve 4 · Solenoid valve 5 · Solenoid valve 7
1551 · -N88- · -N89- · -N90- · -N91- / · -N92- · -N94-
Can be disregarded

Non-activated solenoid valves display "0" and activated solenoid valves display "1".
All solenoid valves are checked via self-diagnosis => Interrogating fault memory, Page
01-38
.

Checking solenoid valves, whilst driving

Group No. · Display zone · Designation · Test conditions / / / Selector lever in: · Specified readout on V.A.G 1551 · Rectifying fault
004 · 1 · Solenoid valves/indicated on · P · 1 0 1 0 00 · Solenoid valves are selected according to driving condition
V.A.G 1551 display · R1) · 0 0 1 0 00 · - Perform
N · 1 0 1 0 00 · electrical check
-N88- Display 1 · D1) · 1H · 0 0 1 0 00 · =>from page 01-88
-N89- Display 2 · 1M · 0 0 1 0 00 · - Continue fault finding according to fault finding programme
-N90- Display 3 · 2H · 0 1 1 0 00
-N91- Display 4 · 2M · 0 1 1 0 00 · => "Fault finding.
-N92- Display 5 · 3H · 0 0 0 0 01 · Power transmission"; No. 14
-N94- Display 6 · 3M · 0 0 0 0 01
4H · 1 1 0 0 01
continued · 4M · 1 1 0 0 01

1)
Whilst driving with gears selected a second mechanic is required for reading the specified values.

Group No. · Display zone · Designation · Test conditions / / / Selector lever in: · Specified readout on V.A.G 1551 · Rectifying fault
004 · 1 · Solenoid valves/indicated on · 31) · 1H · 0 0 1 0 00 · Solenoid valves are selected according to driving condition
V.A.G 1551: · 1M · 0 0 1 0 00 · - Perform
-N88- Display 1 · 2H · 0 1 1 0 00 · electrical check
-N89- Display 2 · 2M · 0 1 1 0 00 · =>from page 01-88
-N90- Display 3 · 3H · 0 0 0 0 01 · - Continue fault finding according to
-N91- Display 4 · 3M · 0 0 0 0 01 · fault finding programme
-N92- Display 5 · 21) · 1H · 0 0 1 0 00 · =>"Fault finding.
-N94- Display 6 · 1M · 0 0 1 0 00 · Power transmission"; No. 14
2H · 0 1 1 0 00
2M · 0 1 1 0 00
11) · 1H · 0 0 1 0 00
1M · 0 0 1 0 00

1)
Whilst driving with gears selected a second mechanic is required for reading the specified values.

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
004 · 2 · Gear selected · Driving1) · / Neutral · / 0 · - Check solenoid valves => Perform electrical check, from page 01-88
Reverse · R
1 hydraulic · 1H
1 mechanical · 1M
2 hydraulic · 2H
2 mechanical · 2M
3 hydraulic · 3 H
3 mechanical · 3M
4 hydraulic · 4H
cont'd · 4 mechanical · 4M

1)
When driving, a second mechanic is needed for reading the specified values.

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
004 · 3 · Selector lever position · Whilst driving1) · / P · / P · - Check and adjust selector lever cable
R · R · => Repair group 37 Automatic gearbox 099 4-speed self-diagnosis
N · N · - Renew multi-function switch -F125-
D · D · => Repair group 38; Dismantling and assembling parking lock
3 · 3
2 · 2
cont'd · 1 · 1
004 · 4 · Vehicle speed · Speed at which vehicle is driven1) · ...km/h · The speedometer reading and readout on V.A.G 1551 may differ slightly

1)
When driving, a second mechanic is needed for reading the specified values.

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
005 · 1 · ATF temperature, ATF level is checked at approx. 35°C - 45°C · Stationary with engine running. The exact temperature is displayed from approx. 30°C · ...°C · - Check gearbox oil temperature sender -G93- => Perform electrical check, from page 01-88 /
2 · Shift outputs · Driving1) / Ignition timing influence or injection quantity influence (only operative during a gear shift) · - Check wiring and connectors using current flow diagram, including data bus wiring / Check engine control unit / => Repair group 01 Automatic gearbox 099 4-speed self-diagnosis
Display 12) · / / is switched on · / / 1 · - Renew engine control unit if necessary
is switched off · 0 · - Renew gearbox control unit -J217- => Page 01-11
22) · was switched on · 1 · - Initiate basic setting =>Page 01-55
cont'd · was switched off · 0

1)
When driving, a second mechanic is needed for reading the specified values.

2)
V.A.G 1551 must always show the same number "1" or "0" in displays 1 and 2. Can be disregarded on vehicles with data bus!

Group No. · Display zone · Designation · Test conditions · Specified read out V.A.G 1551 · Rectifying fault
005 · 2 · Shift outputs · Selector lever lock solenoid -N110-
Display 3 · is / switched on · / 1 · - Check selector lever lock solenoid -N110- => Perform electrical check, from page 01-88
is / switched off · 0
4 · switched on · 1
switched off · 0
Cruise control system · - Check wiring on basis of current flow diagram
5 · / / switched on · / / 1 · - Check cruise control system / => "Current flow diagrams, Electrical fault finding and Fitting locations" binder / => Sharan 1996 ▸
cont'd · switched off · 0

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
005 · 2 · Selector outputs / Display 6 · / Air conditioner · / is switched off · / 1 · / Check routing of wiring on basis of current flow diagram
is not / switched off · 0 · - Check air conditioner / => Heating, Air conditioning; Repair group 87 Heating, Air conditioning;
7 · Park/Neutral signal / Selector lever in · - Check wiring on basis of current flow diagram
P, N · 1
R · 0
cont'd. · D, 3, 2, 1 · 1 / 0 · Selector lever positions D, 3, 2, 1 can be disregarded

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
005 · 3 · Gear to select · Driving1) · Neutral · 0 · - Check solenoid valves => Perform electrical check, from page 01-88
Reverse · R
1 hydraulic · 1H · - If gearshifts do not occur, a clutch or brake may be defective
1 mechanical · 1M
2 hydraulic · 2H · => "Fault finding" binder, Power transmission, No. 14
2 mechanical · 2M
3 hydraulic · 3 H · - Renew gearbox control unit -J217- => page 01-11
3 mechanical · 3M
4 hydraulic · 4H
4 mechanical · 4M

1)
When driving, a second mechanic is needed for reading the specified values.

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
005 · 4 · Engine speed · Driving1) / with engine running · rpm · - Perform self-diagnosis for relevant engine / Check wiring and connectors according to current flow diagram, including Data bus wiring
006 · Can be disregarded

1)
When driving, a second mechanic is needed for reading the specified values.

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
007 · 1 · Gear selected1) · Neutral · 0 · - Check solenoid valves => perform electrical check, from page 01-88
Reverse · R · - If gearshifts do not occur, a clutch or brake may be defective
1 hydraulic · 1+/- · => "Fault finding, Power transmission" binder
1 mechanical · 1+/- · - Replace gearbox control unit -J217- => Page 01-11
2 hydraulic · 2H +/- · Note:
2 mechanical · 2M +/- · The + (or -) sign
3 hydraulic · 3 H +/- · relates to the
3 mechanical · 3M +/- · speed information
4 hydraulic · 4H +/- · In display zone 2.
cont'd · 4 mechanical · 4M +/-

1)
When driving, a second mechanic is needed for reading the specified values.

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
007 · 2 · Torque converter lock-up clutch slip · Whilst driving1) / with engine running · In the hydraulic gears2) · 0 ... stall speed · - Check wiring using current flow diagram
Solenoid valve 4 -N91- is activated · Torque converter lock-up clutch closed / · Engine speed: 2000 ... 3000 rpm in the mechanical gears / 3) · / 0 ... 130 / rpm · - Check solenoid valves 4 -N91- => Perform electrical checks, from page 01-88 / Check gearbox / => Repair group 37; Checking gearbox when clutch slipping or burned Automatic gearbox 099 4-speed self-diagnosis

1)
When driving, a second mechanic is needed for reading the specified values.

2)
The torque converter lock-up clutch must be open!

It is open when in display zone 1 "H" = hydraulic with slip is displayed. Additionally the character "+ or -" is displayed. "+" signifies that the engine speed (pump speed) is greater than turbine speed, vehicle under traction.

"-" signifies that the engine speed is less than turbine speed, vehicle in overrun.

3)
The gear shift must be completed. The torque converter lock-up clutch must be closed and the accelerator pedal value held constant (power from engine is delivered mechanically -without slip- "M").

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
007 · 3 · Engine speed · Whilst driving1) / With engine running · rpm · - Perform self-diagnosis for respective engine / Check wiring and connectors using current flow diagram, including data bus wiring
4 · Accelerator pedal value · Idling · 0...1 % · When accelerating from idling to full throttle the percentage value constantly increases
Full throttle · 99...100 % · - Procedure, see display group number 001; Display zone 2 "Throttle valve potentiometer"
008 · Can be disregarded

Only vehicles with data bus

Display Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
010 · 1 · Throttle valve value 1) · Stationary · Idling · 0...1 % · The % value rises continuously during acceleration from idling speed to full throttle.
Full throttle · 99...100 % · - Put system into basic setting =>Page 01-55 / Perform self-diagnosis of respective engine
2 · Accelerator pedal value (without CCS) · Stationary · Idling · 0...1 % · When accelerating from idling to full throttle, % figure increases continuously
Full throttle · 99...100 % · - Bring system into basic setting =>Page 01-55
3 · Accelerator pedal value (with CCS) · Stationary · Idling · 0...1 % · When accelerating from idling to full throttle, % figure increases continuously
Cont'd · Full throttle · 99...100 % · - Put system into basic setting =>Page 01-55

1)
For vehicles with TDI engines, the reading from the accelerator pedal position sender -G79- is displayed.

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
010 · 4 · Switch positions
Kickdown switch · Display / 1 · Kickdown · / Operated · / 1 · / Perform self-diagnosis of respective engine
Not operated · 0 · - Check wiring and connections, including data bus wiring, using current flow diagram
Idling switch · 2 · Idling · Recognised · 1 · - Perform self-diagnosis of respective engine
Not recognised · 0 · - Check wiring and connections, including data bus wiring, using current flow diagram
Brake light switch -F- · 3 / · Brake · Operated · 1 · - Check brake light switch -F- => Perform electrical check,from Page 01-88
cont'd · Not operated · 0

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
010 · 4 · Brake pedal switch · Display / 4 · Brake pedal switch · / Operated · / 1 · - Check data bus => Perform electrical check, from Page 01-88
Not operated · 0
CCS · 5 · CCS · / Active · / 1 · - Check CCS / => Repair group 23; of respective engine code
Not active · 0 · => Repair group 24; of respective engine code
Throttle valve signal · 6 · Signal · / Active · / 1 · - Check throttle valve control part / => Repair group 24; of respective engine code
Not active · 0

Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
010 · 4 · Accelerator pedal (without CCS) · Display / 5 · Accelerator pedal sensor · / Not OK · / 1 · - Check accelerator pedal position / => Repair group 20; of respective engine code
OK · 0
Accelerator pedal (with CCS) · Display / 6 · Accelerator pedal sensor · / Not OK · / 1 · - Check accelerator pedal position / => Repair group 20; of respective engine code
OK · 0

Only vehicles with data bus

Display Group No. · Display zone · Designation · Test conditions · Specified readout on V.A.G 1551 · Rectifying fault
125 · 1 / · Engine control unit · On data bus · Engine 1 · - OK
/ · Not on data bus · Engine 0 · - Check data bus wiring and connectors using current flow diagram / Perform electrical check => Page 01-88
2 · ABS control unit · On data bus · ABS 1 · - OK
/ · Not on data bus · ABS 0 · - Check data bus wiring and connectors using current flow diagram / Perform electrical check => Page 01-88
3 / · Dash panel insert · On data bus · Combi 1 · - OK
/ · Not on data bus · Combi 0 · - Check data bus wiring and connectors using current flow diagram / Perform electrical check => Page 01-88