The short version
If you own a Nexus S2, this is the update to install. V1.34.2 has one change: it cures unstable voltage readings that could show up on a range of the S2's inputs and outputs. That fix only applies to the S2. Because it sits on top of V1.34.1 and V1.34.0, you also get everything listed below.
You need NSP 1.46.3 or later and Haltech Connect 1.6.6 or later. Save a copy of your current calibration first, and read the cranking note below if you run staged injection.
Included from V1.34.1
- The Spool Up Gear function now has a default of 1 for Number of Operations, a value that was previously missing.
- HBO settings show correctly when the output is set up as a state output.
- With an LZA-09 sensor selected on the internal wideband, the "cell error" and the failed free air calibration are both fixed.
Included from V1.34.0
New features
| Area | What's new |
|---|---|
| Transmissions | Ti6L and GM 6L transmissions are now supported |
| Triggers | An alternate BMW S65 trigger pattern is available |
| Sensors | New Engine Oil Temperature Return sensor, which can also drive the thermo fan |
| Transmission Input RPM | Up to 60 teeth can now be configured, up from 50 |
| Wideband | The setup checklist now warns if a wideband sensor is unplugged or open circuit, on the internal controller or a CAN wideband, even with the engine off |
| Rebel LS and Rebel JZ | A second CAN port is now available |
Fixes and changes worth knowing about
- Cranking on multi-stage injection: prime pulses and asynchronous transient throttle fuel now only go to the first injector stage. If you run staged injectors, check your cranking and start-up fuel after updating, as it may need retuning.
- RX-8 plug-in ECU: less cranking fuel on cold starts.
- Rebel LS: the Vehicle Speed Sensor input type can be selected again, and the Driveshaft RPM sensor now defaults to 40 pulses per revolution, which matches the most common sensor.
- Transient throttle: the asynchronous output now fires the first time after power-up.
- Tables: fixed cell rounding on axes using Discrete Centered mode with consecutive whole-number values.
- NSP display: external devices no longer flicker in the navigation tree when connected but not enabled in the Haltech CAN System menu, and PWM-capable outputs set as switched outputs now show only pin state.
- Logging: NSP now warns you if an on-board logging group has channels in it but is switched off.
- Channels: Home % Travel and Worst Home % Travel are back, and wideband derived channels report errors properly.
- Protection: better overcurrent protection on the injector drivers.
Our take
For S2 owners, the voltage fix alone makes this worth installing. Everyone else on these releases should pay most attention to the staged injection cranking change, since it's the one that can change how your car starts. Log a few cold and hot starts afterward. For the releases around this one, see V1.34.1, V1.34.3 and V1.35.5. Not sure whether to update a car that's running well? Ask us.
