Kove 450 Rally Maintenance Manual page 109

4.3 OBD Interface Introduction
Pin 4, 7 and 16 on the OBD diagnostic connector are used for EMS
with engine management system. Pin 4 of the standard diagnostic
connector is connected to the negative terminal of the battery; pin 7 is
connected to pin E3 of the ECU, which is the "K" wire of the ECU; pin 16
is connected to the positive terminal of the battery
ISO9141-2 standard diagnostic interface pin number
The diagnostic device communicates with the ECU via the "K" wire and can
read the following information.
-Version information display
ECU hardware number, ECU software number.
-Fault code display
Intake pressure sensor, intake temperature sensor, engine temperature
sensor, throttle position sensor, oxygen sensor, oxygen sensor heating line,
air-fuel ratio correction, fuel injector, fuel pump relay, speed sensor, carbon
canister control valve, speed signal, idle speed, idle speed regulator, system
voltage, ECU, fault light and other fault information.
-Engine parameter display
Battery voltage, engine speed, target idle speed, vehicle speed, engine
temperature, engine temperature sensor signal voltage, intake air
temperature, intake air temperature sensor signal voltage, intake air pressure,
intake air volume, stepper motor target position, throttle position sensor
signal voltage, throttle opening, relative throttle position, carbon canister
control valve duty cycle, charge time, injection pulse width, ignition advance
angle, oxygen sensor Short-term correction, oxygen sensor voltage, oxygen
sensor long-term correction, relative engine load, carbon canister control
relative fuel injection, carbon canister purge rate, carbon canister load, idle
actuator TEV opening, ambient pressure, altitude correction factor, injection
phase, and other parameters.
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