2012-2016 Subaru ImprezaGJ Impreza

Technical Reference

Member-uploaded diagrams & documents for this generation. AI-classified; community-verified where badged.

Schematics (5)

• MegaSquirt IRLZ44 FET Idle Valve & Solenoid Spare Drive Schematic - PWM Boost
  This document contains two electronic schematics related to MegaSquirt engine management installations, apparently comparing idle valve / solenoid drive circuit options. The left schematic shows an IRLZ44 MOSFET driver…
• TIP120 vs IRLZ44N Pinout & Specs - MegaSquirt PWM Idle Valve Driver Schematic
  This is a composite reference image comparing two transistors and showing a related driver circuit, uploaded as electronics reference material for an engine-management (MegaSquirt-style) project. The left panel is a…
• TIP120 vs IRLZ44N Pinout & Specs - MegaSquirt PWM Idle Valve Drive Schematic
  This document is a composite reference image comparing two transistor options, the TIP120 NPN Darlington transistor and the IRLZ44N N-channel power MOSFET, alongside a solenoid/spare drive schematic (typical of…
• Opto-Isolated Tach/RPM Input Schematic (4N25) - 5V & 12V Mods, Subaru COP Swap
  This document is an annotated electronic schematic showing an RPM/tachometer input circuit built around a 4N25 opto-isolator (U3). The signal path runs from a TachIn input through a TachSelect jumper and an OptoIn…
• Subaru COP Tach Input Adapter Schematic - NTE192/2N5551 High Voltage Tacho
  This hand-annotated schematic shows a tachometer input adapter circuit for use with a Subaru coil-on-plug (COP) ignition setup and a MegaSquirt-style ECU. The Subaru ECU's 12V pulse signal from cylinder #1 (taken from…

Manual Pages (3)

• Subaru ECM I/O Signal Chart: Engine Speed (Tach) Output Pin B134-23 & Voltages
  This is a page from a Subaru service manual's ENGINE (DIAGNOSTICS) section showing the Engine Control Module (ECM) I/O Signal table. The table lists ECM inputs/outputs by connector number (B134 or B136) and terminal…
• Subaru WRX H4DOTC ECU Pin Voltage Table - Engine Speed/Tach Output B136 Pin 22
  This is a screenshot of a NASIOC forum post displaying a scanned Subaru factory service manual page (footer code EN(H4DOTC)(diag)-21) containing an ECU connector pin voltage reference table. The table lists ECU signals…
• NTE 192 Transistor Datasheet - Max Ratings & Electrical Characteristics
  This document is a datasheet excerpt for the NTE 192 NPN transistor, showing its Absolute Maximum Ratings and Electrical Characteristics. Maximum ratings include collector-emitter voltage of 50V, collector-base voltage…

Wiring Diagrams (2)

• 12V/Ground Triggered Tach Adapter Wiring Diagram - Relay + TIP31C/TIP120
  This document is a screenshot of a forum post (#35, dated April 6, 2011) from the MR2OC (Toyota MR2 Owners Club) community by member 'scarecrowX' (joined March 2, 2004; 4,905 posts). It presents a wiring diagram for a…
• Subaru Coil-On-Plug (COP) Conversion Wiring Diagram - Coil Pack Plug Pinout
  This is a hand-drawn/illustrated wiring diagram for a Subaru coil-on-plug (COP) conversion, showing how four individual coil-on-plug units (labeled Cylinder1 through Cylinder4) are wired to the original coil pack plug…

Data/Spec Plates (2)

• TIP120 vs IRLZ44N Pinout & Specs - TO-220 Darlington and MOSFET Comparison
  This image is a side-by-side comparison reference of two common power semiconductor components, apparently saved for a Subaru tach-adapter / coil-on-plug conversion project. The left panel, sourced from…
• NTE192 Transistor Pinout Diagram - Emitter, Base, Collector Pin Identification
  This document is a pinout diagram for the NTE192 transistor, sourced from el-component.com (visible as a watermark). It shows an illustration of the component in a small plastic transistor package with three leads…