Installing universal standalone GCU requires certain modifications to be done to the mechatronics unit inside VW DSG DQ50 gen.2 transmission.
To modify it You’ll need:
- Soldering station
- Dremel /w abrasive plate
- Torx
- Side cutters
- Wires (24AWG silicone/PTFE wires, oil resistant, 200C rated)
CAUTION: This modification require soldering experience and steady hand due to very tight location of soldering
RECOMMENDATION: please use NOISE SUPPRESION circuit that can be found at HTG e-SHOP to minimize risk of signal noise. Circuit description can be found at WIKI / WIRING / NOISE troubleshooting
ANOTHER CAUTION: Gen.2 of DQ500 comes without clutch speed and temperature sensor by default! It has socket allowing to connect the same one as used in Gen.1. This sensor canbe purchased here:https://htg-tuning.com/shop/dq500-shaft-speed-and-temperature-sensor/
After removing unit from valve body it is strongly recommended to degrease whole assembly to improve ease of modification and keep your workplace clean. Universal degreaser works just fine as well as brake cleaner or so.
Perform following connections: #
A1 | GCU FREQ_in1 (A3) and add 82R (100R and 470R Parallel) pull-up to GCU +5v_out (M1) |
A2, A3, A8, A14, A16, B2, F1 | GCU s GND (L2) |
A6, A10, A12, A17, B3 | GCU +5v_out (M1) |
B1 | GCU AN_in2 (C2) |
F2 | GCU FREQ_in2 (A4) and add 82R (100R and 470R Parallel) pull-up to GCU +5v_out (M1) |
A4 | GCU AN_in8 (D4) |
A5 | GCU AN_in3 (C3) |
A7 | GCU AN_in7 (D3) |
A9 | GCU AN_in4 (C4) |
A11 | GCU AN_in9 (E1) and add 2k2 pull-up to GCU +5v_out (M1) |
A13 | GCU FREQ_in3 (B3) |
A15 | GCU AN_in1 (C1) |
From Solenoid side (S) : #
S1 | together with S8 and S12 and connect to +12V_const (M3,M4) |
S2 | GCU PWR_out1 (H1) |
S3 | GCU PWR_out2 (H2) |
S4 | GCU PWR_out3 (H3) |
S5 | GCU PWR_out4 (H4) |
S6 | GCU PWR_out5 (J1) |
S7 | GCU PWR_out6 (J2) |
S8 | refer to point A |
S9 | GCU PWR_out7 (J3) |
S10 | GCU PWR_out8 (J4) |
S11 | GCU PWR_out9 (K1) |
S12 | refer to point A |
S13 | GCU PWR_out10 (K2) |
S14 | not used |
Do not forget to reinstall metal bracket holding clutch pressure sensors: