Audi Workshop Service and Repair Manuals

1)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Note on fault code 17110 / P0726:

• ◆ Engine speed signal is transmitted from engine control unit via CAN bus wire to gearbox control unit.

Refer to next page for notes and footnotes on fault code 17114 / P0730.

Notes on fault recognition for fault code 17114 / P0730:

• ◆ Gearbox control-unit gear monitoring checks transmission ratios by comparing gearbox input and gearbox output speeds with allowance for gear engaged in each case. This fault is displayed if an impermissible gear ratio (implausibility) is detected.
• ◆ When testing stall speed, gearbox input speed in torque converter with vehicle stationary and gear engaged must be virtually zero. If this is not the case, this fault will also be displayed due to the possibility of clutch damage (Reading measured value block ; Display group number 001).

Notes on fault recognition for fault code 17115 / P0731:

• ◆ Gearbox control-unit gear monitoring checks transmission ratios by comparing gearbox input and gearbox output speeds with allowance for gear engaged in each case. This fault is displayed if an impermissible gear ratio (implausibility) is detected.

Notes on fault recognition for fault code 17116 / P0732:

• ◆ Gearbox control-unit gear monitoring checks transmission ratios by comparing gearbox input and gearbox output speeds with allowance for gear engaged in each case. This fault is displayed if an impermissible gear ratio (implausibility) is detected.

Notes on fault recognition for fault code 17117 / P0733:

• ◆ Gearbox control-unit gear monitoring checks transmission ratios by comparing gearbox input and gearbox output speeds with allowance for gear engaged in each case. This fault is displayed if an impermissible gear ratio (implausibility) is detected.

Notes on fault recognition for fault code 17118 / P0734:

• ◆ Gearbox control-unit gear monitoring checks transmission ratios by comparing gearbox input and gearbox output speeds with allowance for gear engaged in each case. This fault is displayed if an impermissible gear ratio (implausibility) is detected.

Notes on fault recognition for fault code 17119 / P0735:

• ◆ Gearbox control-unit gear monitoring checks transmission ratios by comparing gearbox input and gearbox output speeds with allowance for gear engaged in each case. This fault is displayed if an impermissible gear ratio (implausibility) is detected.

1)    Pressure control valve 4 -N218 is also referred to as solenoid valve 7 -N94.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

1)    Pressure control valve 4 -N218 is also referred to as solenoid valve 7 -N94.

Notes on fault recognition for fault code 17125 / P0741:

• ◆ Ratio of gearbox input speed (-G182) to engine speed with torque converter clutch engaged is not appropriate (implausible).

Refer to next page for notes and footnotes on fault codes 17135 / P0751 and 17136 / P0752.

1)    Start by checking connectors for contact corrosion or ingress of water and replace if necessary. Particular attention is to be paid to 16-pin connector at gearbox between valve body and wiring harness if faults affecting solenoid valves are displayed.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Notes on fault detection for fault codes 17135 / P0751 and 17136 / P0752

• ◆ Check for short to positive is made on switching on ignition. All types of fault are recognised when engine is running.

1)    Start by checking connectors for contact corrosion or ingress of water and replace if necessary. Particular attention is to be paid to 16-pin connector at gearbox between valve body and wiring harness if faults affecting solenoid valves are displayed.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Refer to next page for notes and footnotes on fault codes 17140 / P0756 and 17141 / P0757.

1)    Start by checking connectors for contact corrosion or ingress of water and replace if necessary. Particular attention is to be paid to 16-pin connector at gearbox between valve body and wiring harness if faults affecting solenoid valves are displayed.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

1)    Start by checking connectors for contact corrosion or ingress of water and replace if necessary. Particular attention is to be paid to 16-pin connector at gearbox between valve body and wiring harness if faults affecting solenoid valves are displayed.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Refer to next page for notes and footnotes on fault codes 17145 / P0761 and 17146 / P0762.

1)    Start by checking connectors for contact corrosion or ingress of water and replace if necessary. Particular attention is to be paid to 16-pin connector at gearbox between valve body and wiring harness if faults affecting solenoid valves are displayed.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

1)    Start by checking connectors for contact corrosion or ingress of water and replace if necessary. Particular attention is to be paid to 16-pin connector at gearbox between valve body and wiring harness if faults affecting solenoid valves are displayed.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

1)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Note on fault code 17968 / P1560:

• ◆ Fault detection condition: Engine speed greater than 7400 rpm

1)    Kickdown switch -F8 is integrated into accelerator position sender -G79.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Notes on fault code 18112 / P1704:

• ◆ Fault detection conditions: Throttle valve signal OK, throttle valve value less than 25 % and short to earth in kickdown input at gearbox control unit(corresponds to kickdown signal) or short to positive; engine must be running.
• ◆ This fault may be erroneously displayed if brake pedal is pressed and accelerator is pressed as far as kickdown (full throttle) at the same time although kickdown switch is OK.

Refer to next page for notes and footnotes on fault code 18141 / P1733.

1)    When selector lever is in Tiptronic gate, manual change-down can be implemented by tapping selector lever to rear (-) or - on vehicles with Tiptronic sports steering wheel - by pressing one of the minus (-) buttons on the steering wheel (change-down position).

2)    Tiptronic switch -F189 incorporates detection switch, change-up position and change-down position. It is permanently installed in the printed circuit board of the symbol panel, i.e. symbol panel must be replaced if Tiptronic switch -F189 is defective.

3)    Tiptronic switch -F189 receives information on Tiptronic gate recognition and Tiptronic change-up/change-down by way of the large magnet attached to the transverse slide of the masking panel. Masking panel must be replaced if magnet has worked loose.

4)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Note on fault recognition for fault code 18141 / P1733:

• ◆ Fault is displayed if switching of change-down position 1) is detected in selector lever position other than D.
• ◆ This fault can only be displayed on vehicles with Tiptronic shift mechanism.

Refer to next page for notes and footnotes on fault code 18147 / P1739.

1)    When selector lever is in Tiptronic gate, manual change-up can be implemented by tapping selector lever forwards (+) or -on vehicles with Tiptronic sports steering wheel - by pressing one of the plus (+) buttons on the steering wheel (change-up position).

2)    Tiptronic switch -F189 incorporates detection switch, change-up position and change-down position. It is permanently installed in the printed circuit board of the symbol panel, i.e. symbol panel must be replaced if Tiptronic switch -F189 is defective.

3)    Tiptronic switch -F189 receives information on Tiptronic gate recognition and Tiptronic change-up/change-down by way of the large magnet attached to the transverse slide of the masking panel. Masking panel must be replaced if magnet has worked loose.

4)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Notes on fault recognition for fault code 18147 / P1739:

• ◆ Fault is displayed if switching of change-up position 1) is detected in selector lever position other than D.
• ◆ This fault can only be displayed on vehicles with Tiptronic shift mechanism.

Refer to next page for notes and footnotes on fault code 18152 / P1744.

1)    Shifting into Tiptronic gate in selector lever position D is recognised by the Tiptronic switch -F189 and transmitted to gearbox control unit.

2)    Tiptronic switch -F189 incorporates detection switch, change-up position and change-down position. It is permanently installed in the printed circuit board of the symbol panel, i.e. symbol panel must be replaced if Tiptronic switch -F189 is defective.

3)    Tiptronic switch -F189 receives information on Tiptronic gate recognition and Tiptronic change-up/change-down by way of the large magnet attached to the transverse slide of the masking panel. Masking panel must be replaced if magnet has worked loose.

4)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Notes on fault recognition for fault code 18152 / P1744:

• ◆ Fault is displayed if Tiptronic is recognised although selector lever is not in Tiptronic gate.
• ◆ This fault can only be displayed on vehicles with Tiptronic shift mechanism.

1)    Start by checking connectors for contact corrosion or ingress of water and replace if necessary. Particular attention is to be paid to 16-pin connector at gearbox between valve body and wiring harness if faults are displayed.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

1)    Start by checking connectors for contact corrosion or ingress of water and replace if necessary. Particular attention is to be paid to 16-pin connector at gearbox between valve body and wiring harness if faults are displayed.

2)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Notes on fault codes 18156 / P1748:

Establish possible cause of trouble and eliminate the following faults:

• ◆ Mechanical faults
• ◆ Hydraulic faults
• ◆ Electr./electronic components and wiring

1)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Notes on fault code 18158 / P1750:

• ◆ Fault detection condition: Battery voltage less than/equal to 9 V => Gearbox switches to emergency running mode => Page 01-3.
• ◆ Failure of electrical system voltage (terminal 30) results in loss of application values, i.e. gearbox control unit has to learn these values again on restarting. Gearshift quality may be poorer than usual during this "re-learning" process.

1)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Notes on fault code 18159 / P1751:

• ◆ Fault detection condition: Battery voltage greater than 16 V.
• ◆ Battery monitoring makes a distinction between four ranges: (U = battery voltage) 1. U < 7 V => Gearbox switches to emergency running mode => Page 01-3

1)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Notes on fault code 18160 / P1752:

• ◆ Fault detection condition: Battery voltage less than/equal to 9 V => Gearbox switches to emergency running mode
  => Page 01-3.
• ◆ Failure of electrical system voltage (terminal 30) results in loss of application values, i.e. gearbox control unit has to learn these values again on restarting. Gearshift quality may be poorer than usual during this "re-learning" process.

Refer to next page for notes and footnotes on fault code 18169 / P1761.

1)    Selector lever lock=>solenoid -N110 is also referred to as selector lever lock solenoid -N110.

2)    Printed circuit board is permanently installed in symbol panel, i.e. symbol panel must be replaced if printed circuit board is defective.

3)    Selector lever lock solenoid -N110 cannot be deactivated, i.e. selector lever cannot be moved out of positions P or D even by pressing brake pedal.

4)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

Refer to next page for notes and footnotes on fault code 18170 / P1762.

1)    Selector lever lock=>solenoid -N110 is also referred to as selector lever lock solenoid -N110.

2)    Printed circuit board is permanently installed in symbol panel, i.e. symbol panel must be replaced if printed circuit board is defective.

3)    Selector lever lock solenoid -N110 cannot be activated in selector lever positions P and N, i.e. it is possible to shift out of P and N without pressing brake pedal.

4)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".

1)    Selector lever lock=>solenoid -N110 is also referred to as selector lever lock solenoid -N110.

2)    Selector lever lock solenoid -N110 cannot be activated in selector lever positions P and N, i.e. it is possible to shift out of P and N without pressing brake pedal.

3)    When selecting measured value block, note type of gearbox hydraulic control system. For a more detailed description, refer to Page 01-194 onwards => under "Reading measured value block".