Specifications

Data Parameters Engine Parameters

ensure communication if one wire is damaged and provide the ability to recognize a CAN circuit

fault. The two lines must not be interchanged as each represents either high or low level.

BRAKE SWITCH

Range: __________________________________________________________ ON/OFF

Used on ME10 systems. This parameter is an ECU input that indicates brake pedal position. The

display should read ON with the brake pedal depressed and OFF at all other times.

CAMSHAFT HALL-EFFECT SENSOR

Range: __________________________________________________________ variable

Used on ME10, ME20, ME27 and ME28 systems. This parameter indicates the state of the

signal from camshaft position (CMP) sensor. On ME10 and ME 20, the reading switches

between “55” and “AA,” depending on whether the Hall-effect signal is high or low. The value

should by constantly switching whenever the engine is running, and the frequency of the

switching increases and decreases in proportion to engine speed. Be aware, readings may be

outside the normal range when the engine is cranking.

On ME27 and ME 28 systems, the parameter should read “Running” when the engine is running

and “Not Running” when the engine is not running.

CAMSHAFT ADJUSTMENT

CAMSHAFT CONTROL

CAMSHAFT SOLENOID

CAMSHAFT TIMING

Range: __________________________________________________________ ON/OFF

Used on DM, DM2, LH, HFM and SIM4 systems. These parameters display the ECU signals to

the variable camshaft timing solenoid. When ON, the ECU is energizing the solenoid to advance

camshaft timing. Typically on 119 and 120 engines, the display reads OFF at idle and switches to

ON at 2000 RPM. For all other engines, the display waits until 4000 RPM before switching to ON.

CAMSHAFT ADJUSTMENT VALVE, RIGHT

CAMSHAFT ADJUSTMENT VALVE, LEFT

Range: __________________________________________________________ ON/OFF

Used on ME27 and ME28 systems. This parameter indicates whether the variable camshaft

timing solenoid is on or off. Below 1500 RPM, the camshaft timing solenoid is OFF or de-

energized—cam timing is retarded to reduce valve overlap which reduces residual exhaust gas.

Between 1500 and 4000 RPM the camshaft timing solenoid is ON or energized. Cam timing is

advanced to reduce mixture loss and improve performance. Above 4000 RPM, the camshaft

timing solenoid is OFF or de-energized. Cam timing is retarded to improve cylinder re-charge.

CAMSHAFT CONTROL LOGIC CHAIN

Range: __________________________________________________________ YES/NO

Used on DM2 systems. This parameter indicates whether the onboard self diagnostic tests have

run for the variable camshaft control system.

CAMSHAFT REFERENCE MARK SIGNAL

Range: __________________________________________________________ YES/NO

Used on DM2 systems. This parameter indicates whether the camshaft reference mark signal is

on (YES) or off (NO). The Scanner normally displays NO with the key on, engine off, and when a

camshaft position sensor fault exists.