VisiCan Parameter Abbreviations, Alert Thresholds & Screen Modes

1. Core Engine & Performance Parameters

  • KWx Max Knock Ignition Retard Across All Cylinders: Displays the highest ignition timing retard value detected across all cylinders. Text Colors: White (< 3.0°) | Orange (3.0° ≤ Retard < 6.0°) | Red (≥ 6.0°)
  • KW1–KW4 Cylinder #1–#4 Knock Ignition Retard: Individual cylinder ignition timing retard values. Text Colors: White (< 3.0°) | Orange (3.0° ≤ KW < 6.0°) | Red (≥ 6.0°) Bargraph Range: 0.0 to 10.0°
  • AFR Air-Fuel Ratio: Real-time air-fuel ratio converted to standard 14.7:1 stoichiometric representation. Most factory ECUs actively stream dynamic AFR/O2 sensor data only after exhaust gas temperature (EGT) reaches 400°C–450°C; static values during cold startup before sensor warm-up are normal. Text Colors: White (Target ± 0.4) | Orange (Target ± 0.5) | Red (Target ± 1.0)
  • HPF / FRP High-Pressure Fuel Rail Pressure: Real-time fuel rail pressure (Bar). Text Colors: White (Target ± 4 Bar) | Orange (Target ± 5 Bar) | Red (Target ± 10 Bar)
  • LPF Low-Pressure In-Tank Fuel Pump Pressure & Duty Cycle: Pressure (Bar): White (Target ± 0.5 Bar) | Orange (Target ± 1.0 Bar) | Red (Target ± 2.0 Bar) | Bargraph Range: 0.0 to 7.0 Bar Duty Cycle (%): Bargraph Range: 0 to 100%
  • IGN Ignition Timing Advance: Real-time ignition timing advance (positive values indicate advance). Bargraph Range: -12.0° to +50.0°
  • INJ Median Injection Timing: Average fuel injection duration (ms).
  • BST Actual Manifold Boost Pressure: Live manifold pressure / boost (Bar). Bargraph Range: -0.85 to +2.55 Bar
  • BTR Target Manifold Boost Pressure: ECU requested manifold pressure (kPa). Bargraph Range: -100 to +200 kPa
  • THR Throttle Position Sensor Angle: Throttle opening percentage (%). Bargraph Range: 0 to 100%
  • STF Short-Term Fuel Trim: Real-time short-term fuel correction percentage (%). Bargraph Range: -25% to +25%
  • TQ Calculated Engine Torque: ECU calculated torque output (Nm). Text Colors: White (< 250 Nm) | Orange (250 ≤ TQ < 300 Nm) | Red (≥ 300 Nm) Bargraph Range: 0 to 550 Nm
  • HP Calculated Engine Horsepower: Estimated real-time engine power output (HP). Bargraph Range: 0 to 300 HP
  • SMK Smoke Torque Limit: ECU maximum torque limit parameter based on smoke-limiter map thresholds (Nm). Bargraph Range: 0 to 550 Nm

2. Temperatures & Fluid Levels

  • CTS Engine Coolant Temperature: Engine coolant fluid temperature (°C). Text Colors: Blue (< 75°C) | White (75°C ≤ CTS < 95°C) | Orange (95°C ≤ CTS < 108°C) | Red (≥ 108°C)
  • O.T Engine Oil Temperature: Engine oil fluid temperature (°C). Text Colors: Blue (< 75°C) | White (75°C ≤ OILT < 105°C) | Orange (105°C ≤ OILT < 115°C) | Red (≥ 115°C)
  • EGT Exhaust Gas Temperature: Exhaust stream temperature (°C). Text Colors: White (< 900°C) | Orange (900°C ≤ EGT < 950°C) | Red (≥ 950°C)
  • IAT Intake Air Temperature: Manifold intake air temperature (°C). Text Colors: Blue (< 20°C) | White (20°C ≤ IAT < 35°C) | Orange (35°C ≤ IAT < 50°C) | Red (≥ 50°C)
  • GBT Gearbox / Transmission Oil Temperature: DSG / Automatic transmission fluid temperature (°C). Text Colors: White (< 105°C) | Orange (105°C ≤ GBT < 115°C) | Red (≥ 115°C) Bargraph Range: 0 to 125°C
  • O.P Engine Oil Pressure: Engine oil pressure reading (kPa). Bargraph Range: 0 to 99 kPa
  • O.L Sump Oil Level: Engine oil pan fluid level depth (mm). Text Colors: White (> 55 mm) | Orange (45 mm ≤ O.L ≤ 55 mm) | Red (< 45 mm) Bargraph Range: 0 to 100 mm
  • TNK Fuel Tank Level: Remaining fuel volume in tank (Liters). Text Colors: White (> 10 L) | Orange (5 L ≤ TNK ≤ 10 L) | Red (< 5 L) Bargraph Range: 0 to 65 L

3. Misfires, Smooth-Running Balance & Camshaft Timings

  • M.1–M.4 Misfire Counters: Real-time misfire counters for Cylinders #1–#4. Text Colors: White (< 6) | Orange (6 ≤ M < 12) | Red (≥ 12) Bargraph Range: 0 to 25 counts
  • D.1–D.4 Injector Quantity Deviation: Idle smooth-running cylinder balance corrections (%). Bargraph Range: -25% to +25%
  • ICA / ICT Intake Camshaft Position: ICA = Actual Intake Cam Angle (%) | ICT = Target Intake Cam Angle (%) Bargraph Range: -25% to +25%
  • ECA / ECT Exhaust Camshaft Position: ECA = Actual Exhaust Cam Angle (%) | ECT = Target Exhaust Cam Angle (%) Bargraph Range: -25% to +25%

4. Speed, Performance Timers & System Info Raw Values

  • SPD Vehicle Speed: Real-time vehicle speed (km/h). Text Colors: White (≤ 180 km/h) | Orange (180 < SPD < 240 km/h) | Red (≥ 240 km/h) Bargraph Range: 0 to 250 km/h
  • 0–100 / 60–160 / 100–200 Performance Acceleration Timers: Acceleration elapsed time counters (seconds). Text Colors: White (< 10.0 s) | Orange (10.0 s ≤ Timer < 20.0 s) | Red (≥ 20.0 s) Bargraph Range: 0.0 to 25.5 s
  • BTV Battery Voltage: System voltage reading (e.g., 136 represents 13.6V).
  • AN0 Ambient Light Sensor Raw Value: Light sensor reading (0–255) for auto-dimming.
  • AN2 Unformatted Battery Voltage: Voltage without decimal point (e.g., 147 = 14.7V).
  • FQ0 Flex Fuel Frequency Output: Raw signal output in Hertz from the ethanol sensor (valid range: 50–150 Hz).
  • ET% Ethanol Percentage: Real-time calculated ethanol content percentage in fuel line.

VisiCan Data Displays Page Structure & Mode Sequence

VisiCan displays arrange monitoring views and system functions in a sequential numerical page order:

  • Page 0: OFF Mode (CAN Gateway Connected Models): Disables active CAN-Bus communication. Allows diagnostic scan tools (e.g., VCDS, ODIS, ISTA) to connect to the OBD port without interference.
  • Page 1: DTC (ECU - Engine) Listing / Clearing Mode: Diagnostic fault code reading and clearing page for Engine Control Units.
  • Page 2: General Overview Mode (Main Gauge Screen): Multi-parameter summary grid displaying primary vehicle PIDs.
  • Page 3: Retard Detail Mode: Focused detailed view monitoring individual cylinder knock retard parameters (KW1–KW4 / KWx).
  • Page 4: Misfire Detail Mode: Focused detailed view monitoring individual cylinder misfire counters (M.1–M.4).
  • Page 5: Boost & Torque Detail Mode: Focused view dedicated to target/actual boost pressure and calculated engine torque.
  • Page 6: Temperature Detail Mode: Consolidated view dedicated to fluid and thermal sensors (Coolant, Oil, EGT, IAT, Transmission).
  • Page 7+: Miscellaneous Custom View Modes: Platform-specific custom parameters and sensor pages.
  • Final Page: Performance Acceleration Monitoring Mode: Acceleration timing meters for 0–100 km/h, 60–160 km/h, and 100–200 km/h.