Specifications

Data Parameters Engine Parameters

TWC TEMPERATURE FROM OBD 2

Range: __________________________________________________________ variable

Used on HFM systems. This parameter displays the ECU-calculated temperature of the three-

way catalyst (TWC) for OBD-II vehicles.

UPPER P. LOAD F. TRIM CYL 1-6, RIGHT

UPPER P. LOAD F. TRIM CYL 4-6, RIGHT

UPPER P. LOAD F. TRIM CYL 7-9, LEFT

UPPER P. LOAD F. TRIM CYL 10-12, LEFT

Range: ______________________________________________________0.750 to 1.280

Used on ME2.7 systems. This parameter is the upper partial load self-adaptation correction

factor that the ECU uses to make long-term fuel trim (LTFT) corrections to maintain a 14.7:1, or

1.0 Lambda, air-fuel ratio. This is a long-term correction factor applied to the pre-programmed

upper partial load base cell values (original fuel, RPM/Load mapping with no correction). On the

display, a 1.0 reading is the base point. Readings over 1.0 are a rich correction, or increased

injector time and readings lower than 1.0 are a lean correction, or reduced injector time. This

correction factor affects only those adaptive learn memory cells controlling long term fuel

correction in the upper-load operation.

UPSHIFT DELAY 2ND GEAR

Range: __________________________________________________________ ON/OFF

Used on LH systems. This parameter indicates whether or not the ECU shift delay program for

second gear is active. This value normally reads OFF. The display only reads ON if the ECU is

holding the transmission in second gear to more rapidly heat up the catalytic converter following

a cold engine start.

VARIABLE SPEED LIMITATION

Range: __________________________________________________________ variable

Used on ME27 and ME 28 systems. Range may be ON/OFF or ACTIVE/NOT ACTIVE. No

information is available at this time.

VEHICLE LOCKED WITH DAS

Range: __________________________________________________________ YES/NO

Used on ERE/EVE/ASF (IFI Diesel)) and ME10 systems. This parameter indicates whether the

drive authorization system (DAS) and the engine control module (ECU) have correctly identified

each other. The display reads YES at startup if the modules correctly identify each other and NO

if they do not. The ECU and DAS module are permanently interlocked by means of an

identification code that cannot be erased. It is not possible to interchange modules from another

vehicle for test purposes. Module interchanges can only be made using a matched pair of

modules. Also, the ME-SFI module has an immobilizer. When the vehicle is locked, the DAS

transmits a signal to the MESFI on the controller area network (CAN) bus that inhibits injection.

The engine only starts if the vehicle is unlocked with the authorized key and the DAS module

transmits a start enable signal to the ME-SFI module.

VEHICLE SPEED

Range: ___________________________________________________ 0 to vehicle max

Used on CD12, DM, DM2, EGS, ERE/EVE/ASF (IFI Diesel)), HFM, LH, and SIM4 systems. This

parameter indicates the speed of the vehicle based on input signals to the ECU from the wheel

speed sensors. The measurement can be changed from kilometers per hour (KPH) to miles per

hour (MPH).