Engine

The Tech 1 scan data listed in this table may be used for comparison after completing the On-Board Diagnostic System Check and finding the on-board diagnostics functioning properly with no Diagnostic Trouble Codes (DTC) displayed. The "Typical Tech 1 Data Values" are an average of display values recorded from normally operating vehicles and are intended to represent what a normally functioning system would display. The values you get may vary due to low battery charge or other reasons, but they should be very close.

A SCAN TOOL THAT DISPLAYS FAULTY DATA SHOULD NOT BE USED, AND THE PROBLEM SHOULD BE REPORTED TO THE MANUFACTURER. THE USE OF A FAULTY SCAN TOOL CAN RESULT IN MISDIAGNOSIS AND UNNECESSARY PARTS REPLACEMENT.

Only the parameters listed below are used in this section for diagnosis. If a scan tool reads other parameters, they may apply to information in another section. For additional description on the values and use of the Tech 1 tool to diagnosis PCM inputs, refer to VEHICLE ON-BOARD DIAGNOSTICS/ACCESSING AND READING DIAGNOSTIC TROUBLE CODES. Testing and Inspection
If all values are within the range illustrated and a problem exists, refer to DIAGNOSIS BY SYMPTOM. Testing and Inspection

SCAN Position Units Displayed Typical Data Value

ENGINE SPEED RPM +/- 50 RPM from desired RPM in drive (A/T) +/- 100 RPM from desired

DESIRED IDLE RPM PCM idle command
(varies with temp)

ENGINE COOL
TEMP °C, °F 85°C - 105°C/190°F - 210°F

INTAKE AIR TEMP °C, °F 10° C - 90° C (varies with underhood temp. and sensor location)

MAP kPa/Volts 29 - 48 kPa/1 - 2 volts (varies with manifold and barometric pressures)

BARO kPa/Volts 60 - 105kPa

THROTTLE POSITION Volts 0.35 - 1.28

THROTTLE ANGLE 0 - 100% 0%

02S Millivolts 100 - 999 (varies continuously)

INJ PULSE WIDTH Milliseconds 0.8 - 3.0

SHORT TERM FUEL
TRIM Counts 110 - 145

LONG TERM FUEL
TRIM Counts 118 - 138

FUEL TRIM CELL Cell# 0

FUEL TRIM ENABLE No/Yes No

SPARK ADVANCE Degrees 0° TO 20°, varies continuously

IDLE SPARK Enable/Disable Enable

KS ACTIVITY Yes/No No

KS RETARD Degrees 0°

LOOP STATUS Open/Closed "Closed Loop"

CONVERTER
HI TEMP No/Yes No

4WD LOW SWITCH Yes/No No

FUEL EVAP
PURGE 0 - 100% 0%

INT TUNING VALVE On/Off Off

EGR DESIRED POS 0 - 100% 0%

EGR ACTUAL POS 0 - 100% 0%

EGR PINTLE POS Volts 0.74 volts

EGR DUTY CYCLE 0 - 100% 0%

1-2 SOL/2-3 SOL Off/On Off/On Off

FUEL SHUTOFF Yes/No No

MPH/Km/h MPH/KPH 0/0

TCC SOLENOID Off/On Off

TRANS RANGE SW Drive 4/Drive 3 P - N

Drive 2/Low P - N

Reverse/P - N P - N

A/B/C RANGE On/Off Off

TCC BRAKE SWITCH On/Off On

FUEL SHUTOFF Yes/No No

IDLE AIR CONTROL Counts (Steps) 1 - 50

PARK/NEUTRAL POS PN/RDL Park/Neutral

A/C REQUEST No/Yes No

A/C CLUTCH On/Off Off

SYSTEM VOLTAGE Volts 13.5 - 14.5

FUEL PUMP VOLTS Volts 13.5 - 15.5

IDLE SPARK Enable/Disable Enable

CALIBRATION ID 0 - 9999 Internal ID only

TIME FROM START Minutes Varies