Operation CHARM: Car repair manuals for everyone.

Reading Input and Output Signals

The values and status of transmission control module input and output signals can be read using this function.

The following parameters can be read out:

- Engine speed.
- Engine coolant temperature.
- Engine coolant temperature sensor, voltage.
- Front heated oxygen sensor, voltage.
- Front heated oxygen sensor, preheating.
- Rear heated oxygen sensor, voltage.
- Rear heated oxygen sensor, preheating.
- Rear heated oxygen sensor, compensation.
- Fuel trim, status.
- Short-term fuel trim.
- Fuel trim, part load.
- Fuel trim, idling.
- Injection period.
- Mass air flow sensor, voltage.
- Load TI.
- Mass air flow sensor, air flow.
- Throttle angle.
- Throttle position sensor, voltage.
- Throttle, status.
- Idle air control valve, air flow.
- Idle air trim.
- Ignition advance.
- Ignition timing retardation requested by transmission control module, status.
- knock 1, status.
- knock 2, status.
- Fuel enrichment, status.
- Battery voltage.
- Vehicle speed.
- Air conditioning relay, status.
- Air conditioning pressure.
- Air conditioning pressure sensor, voltage.
- Engine cooling fan (FC), status.
- Operating cycle, status.
- Trip, status.
- Warm-up cycle, status.
- Fault active, status.
- Malfunction indicator lamp lit, status.
- Lighting of malfunction indicator lamp requested by transmission control module, status.
- Gear selector position, status.
- Canister purge valve.
- Fuel pump relay, status.
- Fuel shut-off system, status.
- Accelerometer*
- Accelerometer, voltage*
- Pulsed secondary air injection system pump, status.
- Flywheel adaption B.
- Flywheel adaption C.

*) Only certain markets, USA and Canada.