If the TCM detects faults in the control circuits, it memorizes them. To read codes, an electronic tester VAG 1551 with an adapter VAG 1551/3 is used.
Note: All information on reading codes is contained in the tester.
Alternatively, troubleshooting can be done by measuring resistance and voltage values using the VAG 1598/18 tester (Refer to the tables).
The voltage is checked without disconnecting the battery - the tester is connected to the TCM and its electrical wiring. When testing resistance, disconnect the negative cable from the battery and connect a tester to the TCM harness. Leave TCM disabled.
If a malfunction is detected, the electrical wiring or the corresponding circuit element should be repaired.
If everything is in order, therefore, the TCM itself is damaged.
Checking voltages and resistances in order to detect malfunctions of electrical components
Contacts on VAG 1598/18 | Liable to verification of the system current | Conditions to be implementation and additional procedures | Rated values | Actions to identify causes of failure |
23 + 1 | Voltage TCM supply | Ignition on (key in ON position) | Voltage close to battery voltage | Check Status wiring from terminals no. 1 Check for availability conduction wiring, from terminal no. 23 to fuse C / 15A in mounting block fuse/relay |
5 + 28 | Sensor provisions throttle dampers | Ignition off (key in OFF position) throttle valve completely closed throttle valve fully open |
2100 + 3900 Ohm | Check Status electrical wiring Calibrate the sensor |
5 + 50 | Sensor provisions throttle dampers | Ignition off (key in OFF position) throttle valve completely closed throttle valve fully open |
700 + 1800 ohm | Check Status electrical wiring Calibrate the sensor |
29+15 | Electromagnetic sensor-switch of blocking of switching | Ignition on (ON) Selector lever in position "P" or
"N" Foot brake applied | Voltage close to battery voltage About 0.2V | Check wiring Replace shift lock solenoid |
15+1 | Signal from the sensor-switch of brake lights | Ignition on (ON) Foot brake released Foot brake cocked | OV Voltage close to battery voltage | Check wiring Replace brake light switch |
63 + 1 | Multifunctional switch | Ignition off (OFF) Switch the selector lever to positions R, N, D, 2 and 3 Move the lever selector lever to positions P and 1 Switch the selector lever to positions P, R, 2 and 1 Move the selector lever to positions N, D and 3 | open | Check wiring connection Replace multifunction switch |
0.8 - 1.0 ohm | ||||
open | ||||
40+1 | 0.8 - 1.0ohm | |||
62+ 1 | Ignition off (OFF) Switch the selector lever to positions P, R, N and D Move the selector lever to positions 3, 2 and 1 | open | ||
0.8 - 1.0 0m | ||||
18 + 1 | Ignition on (ON) Switch the selector lever to positions P, R and N Switch the selector lever to positions D 3, 2 and 1 | Voltage close to battery voltage | ||
OV | ||||
55 + 67 | Solenoid valve 1 | Ignition off (OFF) Control unit removed | 55 - 65 Ohm | Check the condition of the wiring harness |
open | Replace valve body | |||
54 + 67 | Solenoid valve 2 | Ignition off (OFF) Control unit removed | 55 - 65 Ohm | Check the condition of the wiring harness |
54+ 1 | open | Replace valve body | ||
9 + 67 | Solenoid valve 3 | Ignition off (OFF) TCM disabled | 55 - 65 Ohm | Check if the electrical wiring is connected correctly |
9+ 1 | open | Replace valve assembly | ||
47 + 67 | Solenoid valve 4 | Ignition off (OFF) TCM disabled | 4.5 - 6.5 ohm | Check if the electrical wiring is connected correctly |
47 + 1 | open | Replace valve assembly | ||
56 + 67 | Solenoid valve 5 | Ignition off (OFF) TCM disabled | 55 - 65 Ohm | Check if the electrical wiring is connected correctly |
56 + 1 | open | Replace valve assembly | ||
58 +22 | Solenoid valve 6 | Ignition off (OFF) TCM disabled | 4.5 - 6.5 ohm | Check if the electrical wiring is connected correctly |
58+1/22+1 | open | Replace valve assembly | ||
10 + 67 | Solenoid valve 7 | Ignition off (OFF) TCM disabled | 55 - 65 Ohm | Check if the electrical wiring is connected correctly |
10+ 1 | open | Replace valve assembly | ||
23 + 29 | Electromagnetic sensor-switch of blocking of switching | Ignition off (OFF) TCM disabled | 14 - 25 Ohm | Check wiring for correct connection Replace solenoid assembly switching lock |
1 + 16 | Kickdown switch | Ignition off (OFF) TCM disabled Accelerator pedal released Accelerator pedal fully squeezed out | open less than 1.5 ohm | Check that the electrical wiring is connected correctly. Adjust or replace throttle cable |
20 + 65 | Vehicle speed sensor | Ignition off (OFF) TCM disconnected Switch ohmmeter to 2 kΩ range | 800 - 900 Ohm | Check wiring for correct connection Replace speed sensor car |
6 + 67 | ATF temperature sensor | Ignition off (OFF) TCM Disabled Switch ohmmeter to 200 kΩ range Temperature ATF = 20°С | 24.700 Ohm | Check that the wiring is connected correctly. Replace valve assembly |
Switch the ohmmeter to the measurement limit of 200 kΩ ATF temperature = 60°C | Approx. 48.800 Ohm | |||
ATF temperature = 120°C | About 7400 ohms | |||
21 +66 | Movement speed sensor (mounted on transmission) | Ignition off (OFF) TCM disconnected Switch ohmmeter to 2kΩ range | 800 - 900 Ohm | Check wiring for correct connection Replace speed sensor car |
Deciphering VAG codes for malfunctions of the transmission control system
00258 | Open, short to ground or damage to electromagnet 1 |
00260 | Open, short to ground or damage to electromagnet 2 |
00262 | Open, short to ground or damage to electromagnet 3 |
00264 | Open, short to ground or damage to electromagnet 4 |
00266 | Break, short to ground or damage to the electromagnet 5 |
00268 | Break, short to ground or damage to the electromagnet 6 |
00270 | Break, short to ground or damage to the electromagnet 7 |
00281 | Break in wiring, damaged vehicle speed sensor or wheel sensor |
00293 | Break in the wiring or damage to the sensor-switch transmission mode |
00297 | Break in the wiring or damage to the speed sensor |
00300 | Broken wiring or damage to the temperature sensor ATF |
00518 | Open/short in the wiring or damage to the position sensor
throttle valve (Throttle position sensor signal is received
to TCM via ECM; on vehicles with a CAN bus, the TCM checks only the fact that a signal is received from sensor, on models without a CAN bus, the status of the signal wires) |
00529 | Break in the wiring or loss of signal from the speed sensor vehicle, vehicle speed sensor on the transmission, engine speed or throttle position sensor |
00532 | Low supply voltage of solenoid valves as a result of battery discharge |
00545 | Open circuit or short to ground (violated communication between engine and transmission control modules) |
00596 | Short circuit in the wiring of the solenoid valves |
00638 | Open circuit or short to ground (violated communication between engine and transmission control modules) |
00641 | Excessively high ATF temperature or sensor damage ATF temperature |
00652 | Electrical or hydraulic failure (clutch or valve assembly) |
00660 | Break in the wiring or incorrect connection of the sensor throttle position (damaged sensor) |
65535 | Faulty TCM |
Visitor comments