Electrical Testing
Electrical testing
Prepare the following special tools and test equipment:
^ VAG1526A multimeter
^ VAG1598/20 test box
^ VAG1594A connector test kit
Notes:
^ Use VAG1526A multimeter for the test. The tables list which measuring range to select before taking each measurement.
^ The specified values are valid for an ambient temperature range of 0 - 40°C (32 - 104°F).
^ If the values obtained differ from the specified values, determine the malfunction using the applicable wiring diagram.
^ If the measured values only deviate slightly from the specified values cyan sockets and connectors of testers and repeat test. Before replacing a component, test the wires and connections Especially if the specified values are below 10 ohms. repeat the resistance measurement on the component.
^ Use VAG1598/20 adapter to connect test equipment.
^ The contact numbers of the connector and the socket numbers of VAG 1598/20 test box match up.
CAUTION! To avoid destruction of file electronic components, the appropriate measuring range must be selected on tester before connecting the measuring leads.
Test requirements
^ Battery voltage OK
^ Fuses for Transmission Control Module (TCM) OK
^ Fuses for component being tested OK
The fuse holder is behind a cover on the side of the instrument cluster.
^ Ground (GND) connections OK:
Check battery Ground (GND) strap and Ground (GND) strap between chassis and transmission.
Check Ground (GND) connections for Transmission Control Module (TCM).
^ For all test steps, switch ignition off, disconnect multi-pin connector for Transmission Control Module (TCM) - J217- (located in front of passenger seat under carpet in foot well) and connect VAG1598/20 adapter to wiring harness connector.
^ If measuring values do not match specifications, follow instructions in right-hand column of test table (labeled "Corrective action").
^ Always perform all steps indicated in "Corrective action" column.
^ Only perform test steps recommended in DTC table (selective troubleshooting).
88-pin connector for Transmission Control Module (TCM) -J217- (sockets on VAG1598/20)
Pins 1 through 5 and 18 through 22
Pins 6 through 15 and 23 through 32
Pins 16, 17, 33 and 34
Pins 35 through 40, and 54 through 56
Pins 41 through 51, and 84 through 86
Pins 52, 53, 87 and 88
List of test steps (88-pin connector)
1) Only for vehicles without CAN-bus
2) Signal is transmitted to Transmission Control Module (TCM) via the Engine Control Module (ECM) and can only be checked in read measured value block.
3) Only for vehicles with a CAN-bus. Further information for CAN-BUS on the CAN-bus.
^ Only perform test steps for the relevant component, as listed in DTC and Read Measuring Value Block tables.
List of steps part 1 of 3
List of steps part 2 of 3
List of steps part 3 of 3
1) Signal is transmitted to Transmission Control Module (TCM) via the Engine Control Module (ECM), test is only for vehicles without a CAN-bus.
2) Only for vehicles with a CAN-bus.
Electrical test table
Test number 1
Test number 2
Test Number 3
Test number 4 part 1 of 2
Test number 4 part 2 of 2
Test number 4 and 5
Test number 5 part 1 of 2
Test number 5 part 2 of 2
1) This test cannot be performed on vehicles with 6cyl. TDI engines and vehicles with E-gas. The kick down switch -F8- in this case is integrated in the Throttle Position (TP) Sensor (-G79-, -G185-).
Test number 6 part 1 of 2
Test number 6 part 2 of 2
Test number 7 part 1 of 2
Test number 7 part 2 of 2
Test number 8 and 9
Test number 9
Test number 10
Test 11 through 13
1) Switch VAG1526 to highest resistance (ohms) measuring range.
2) Solenoid valve 4 -N91- is also referred to as pressure control valve -1- for auto. transmission -N215-.
Test number 14
Test number 15 through 16
1) Switch VAG1526 to highest resistance (ohms) measuring range.
2) Solenoid valve 5-N92- is also referred to as pressure control valve -2- for auto transmission -N216-.
3) Solenoid valve 6 -N93- is also referred to as pressure control valve -3- for auto transmission -N217-.
4) Solenoid valve 7 -N94- is also referred to as pressure control valve -4- for auto transmission -N218-.
Test number 17
Test number 17 and 18
1) Switch VAG1526 to highest resistance (ohms) measuring range.
2) This test cannot be performed on vehicles with 6 cyl. TDI engines and vehicles with E-gas. The kick-down switch -F8- in this case is integrated in the Throttle Position (TP) Sensor (-G79-, -G185-).
3) The shift lock solenoid -N110- is also referred to as "shift lock -N110".
Test number 19 part 1 of 2
Test number 19 part 1 of 2
1) Switch VAG1526 to highest resistance (ohms) measuring range.
2) The Transmission Vehicle Speed Sensor (VSS) -G38- is also referred to as sender for transmission output -G195-.
Test number 20 part 1 of 2
Test number 20 part 2 of 2
Test number 21 part 1 of 2
Test number 21 part 2 of 2
Test number 22
1) Switch VAG1526 to highest resistance (ohms) measuring range.
2) Corresponding terminal assignment at Engine Control Module (ECM).
A) Signal is transmitted to Transmission Control Module (TCM) via the Engine Control Module (ECM). Test is only for vehicles without CAN-Bus.
Test number 23 part 1 of 2
Test number 23 part 1 of 2
2) Corresponding terminals at Engine Control Module (ECM).
A) Signal is transmitted to Transmission Control Module (TCM) via the Engine Control Module (ECM). Test is only for vehicles without CAN-Bus.
Test number 24
Test number 25
1) Switch VAG1526 to highest resistance (ohms) measuring range.
2) Corresponding terminals assignment at Engine Control Module (ECM).
A) Signal is transmitted to Transmission Control Module (TCM) via the Engine Control Module (ECM). Test is only for vehicles without CAN-Bus.
Test number 26
1) Switch VAG1526 to highest resistance (ohms) measuring range.
2) Corresponding terminals assignment at Engine Control Module (ECM).
A) Signal is transmitted to Transmission Control Module (TCM) via the Engine Control Module (ECM). Test is only for vehicles without CAN-Bus.
Test number 27 part 1 of 4
Test number 27 part 2 of 4
Test number 27 part 3 of 4
Test number 27 part 4 of 4
1) Switch VAG1526 to highest resistance (ohms) measuring range.
2) Terminal assignment on multi-function TR switch connector; disconnector.
Notes for test step 27
^ Pull off spring catch securing 8-pin connector -2- to connector on wire for multifunction TR switch.
^ Terminal assignment on 8-pin connector for multifunction Transmission Range (TR) switch.
Test number 28 part 1 of 2
Test number 28 part 2 of 2
1) The Tiptronic switch -F189- is integrated into the conductor strip of the symbol insert which is located in the cover of the shift mechanism. In case of interference the Tiptronic switch must first be checked to test whether the magnet which is mounted sideways on the lateral gate cover of the gate is properly attached. If it is not properly attached, the gate cover must be replaced. If the magnet is properly attached and the wire connection is OK, the symbol insert with the integrated conductor strip must be replaced.
Test number 29 1 of 4
Test number 29 2 of 4
Test number 29 3 of 4
Test number 29 4 of 4
1) The Tiptronic switch -F189- is integrated into the conductor strip of the symbol insert which is located in the cover of the shift mechanism. In case of interference the Tiptronic switch must first be checked to test whether the magnet which is mounted sideways on the lateral gate cover of the gate is properly attached. If it is not properly attached, the gate cover must be replaced. If the magnet is properly attached and the wire connection is OK, the symbol insert with the integrated conductor strip must be replaced.
2) If the selector lever is in the Tiptronic gate, a manual change down (down shift) can be performed by pressing the selector lever toward rear (-) or by pressing one of the minus (-) buttons on the steering wheel (for vehicles with Tiptronic sport steering wheel). A manual change up (up shift) can be performed by pressing the selector lever toward front (+) or by pressing one of the plus (+) buttons on the steering wheel (for vehicles with Tiptronic sport steering wheel).
Test number 30
1) Switch VAG1526 to highest resistance (ohms) measuring range.
2) Corresponding terminal assignment at Engine Control Module (ECM).
A) Testing only for vehicles with CAN-bus.
Wiring between transmission and 88-pin connector for Transmission Control Module (TCM), testing
Perform if:
^ if the output Diagnostic Test Mode (DTM) or
^ the electrical testing indicates malfunctions in the transmission, the Transmission Control Module (TCM) - J217- or in the corresponding wiring.
Test conditions
^ Ignition switched off
^ VAG1598/20 adapter connected only to 88-pin connector on transmission wiring harness
^ Measurements performed with
^ VAG1598/20 adapter outside vehicle
^ Remove noise insulation panel.
^ Remove bracket -1- for noise insulation panel.
Testing wiring to 16-pin connector on transmission
^ Turn 16-pin connector -4- on transmission to release bayonet catch.
^ Use multimeter (Fluke 83 or equivalent) to test for continuity between terminals on 16- pin connector and sockets on VAG1598/20 adapter.
Resistance specifications
Specifications at Terminals 1 through 6
Specifications at Terminals 7 through 13
Specifications at Terminals 14 through 16
Notes:
^ If readings obtained in these tests match the specifications, check the wiring harness in the transmission.
^ Only replace relevant solenoid valves if no malfunctions are found in the wiring harness in the Transmission.
testing wiring to multi-function TR switch (8-pin connector)
^ Pull off spring catch securing 8-pin connector -2- to connector on wire for multifunction TR switch.
^ Use multimeter (Fluke 83 or equivalent) to test for open circuits between terminals on 8-pin connector and sockets on VAG1598/20 adapter.
Resistance specifications
part 1 of 2
part 2 of 2
- Repair open circuit according to current wiring diagram.
Check connectors for:
- contact corrosion
- ingress of water
- leaks
Note: If the readings obtained in these wiring tests match the specifications, replace the multifunction Transmission Range (TR) switch -F125-.