Specifications

Data Parameters Engine Parameters

CHECK ENGINE AFTER FULFILLING FAULT SEQUENCE

Range: __________________________________________________________ YES/NO

Used on ME10 systems. This parameter indicates the check engine light status after an ECU

diagnostic self-test. A reading of YES indicates a fault was detected during the self-test and the

check engine light should be illuminated. A reading of NO indicates that no faults were present

during the self-test.

CIRCUIT 15

CIRCUIT 50

Range: __________________________________________________________ ON/OFF

Used on ERE/EVE/ASF (IFI Diesel)) and LH systems. This parameter indicates the state of

circuit 15 or 50, which is the starter circuit. The display should read ON when the starter is

engaged during cranking and OFF after engine starts.

CIRCUIT 50 OUTPUT

CIRCUIT 50 INPUT

Range: __________________________________________________________ ON/OFF

Used on ERE/EVE/ASF (IFI Diesel)) systems. These parameters indicate the input or output

state (on or off) of circuit 50, which is the starter circuit. When the starter cranks, both parameters

should display ON.

CLUTCH DEPRESSED

Range: __________________________________________________________ ON/OFF

Used on HFM systems. This parameter indicates the state of the clutch switch input to the ECU.

The display should read ON whenever the clutch pedal is depressed, and read OFF when the

clutch pedal is not depressed.

CLUTCH SWITCH

Range: __________________________________________________________ ON/OFF

Used on ERE/EVE/ASF (IFI Diesel)) and SIM4 systems. This parameter indicates whether the

clutch switch is in the ON or OFF position. ON means the clutch is being depressed.

COIL FAULT COUNTER T1/1 CYL. 1/4

COIL FAULT COUNTER T1/1 CYL. 2/5

COIL FAULT COUNTER T1/2 CYL. 2/3

COIL FAULT COUNTER T1/2 CYL. 3/4

COIL FAULT COUNTER T1/3 CYL. 1/6

Range: ___________________________________________________________0 to 255

Used on HFM distributorless systems. These parameters are numerical fault counters for the

ignition coils. This is an ECU input used for monitoring coil output.

The abbreviations “T1/1,” “T1/2,” and “T1/3” refer to the three ignition coils; the numbers that

follow, “1/4,” “2/5,” “2/3,” “3/4,” “1/6” refer to the cylinders the coils fire.

When the engine operates normally, the parameter values should be 0 or near 0. The greater the

number, the more severe the misfire. Once a misfire causes the counter to reach 255, the ECU

resets the parameter to 0. These parameters assist in troubleshooting misfires by pinpointing the

problem to at least one of two cylinders.