NOTE: Information contained in the following tables is typical of readings taken on a vehicle with engine idling at normal operating temperature, throttle closed, transmission in Park or Neutral, system in closed loop status, and all accessories off (except as noted in tables). For additional information, see scan tool owner's manual.

SCAN TOOL DATA VALUES

Scan Tool Parameters ⁽¹⁾

Typical Data Value

Air Conditioning

OFF

BARO

⁽²⁾ 12.9-14.4 (88-89 kPa)

Battery Voltage

10-14 Volts

Closed Throttle Switch

Idle (ON)

Desired Idle Speed

850 RPM

ECT

⁽³⁾ 185-203°F (85-95°C)

EGR Solenoid Vacuum Valve ⁽⁴⁾

OFF

EGR Bypass Solenoid ⁽⁴⁾

OFF

Electrical Load Signal

⁽⁵⁾ NO

Engine Speed

750-950

Engine Load

3-5%

Engine Cooling Fan

⁽³⁾ ON/OFF

EVAP Duty Cycle

0-100%

EVAP Density Trim

0-14

EVAP Vent Solenoid

⁽⁶⁾ ON/OFF

Fuel Cutoff Signal

OFF

Fuel Injector PWM

0.8-2.3 mS

Fuel Pump

ON/OFF

Fuel Tank Pressure Control Solenoid

⁽⁷⁾ ON/OFF

Fuel Tank Pressure

⁽⁷⁾⁽⁸⁾ 0.0" H2O

Fuel Tank Level

⁽⁹⁾ Varies

Fuel Trim (Long Term)

⁽¹⁰⁾ -15% - +15%

Fuel Trim (Short Term)

⁽¹⁰⁾ -20% - +20%

HO2S-1

⁽¹¹⁾ 50-950mV

HO2S-2

⁽¹¹⁾ 0-950mV

HO2S-1 Ready

Yes

HO2S-2 Ready

IAT

⁽¹²⁾ 82°F (28°C)

ISC Duty Cycle

20-40%

Loop Status

Closed

MAP (Pressure)

4-7 psi (29-47 kPa)

MAP (Voltage)

⁽¹³⁾ 1.32-1.90 volts

Park/Neutral Position Switch

Park Or Neutral

Power Steering Switch

⁽¹⁴⁾ ON/OFF

Spark Advance Adjust Test Switch

OFF

Spark

-1° - -18°

Starter Switch

Released

Throttle Position Angle

7-18%

Throttle Position Sensor

0.42-1.15 Volts

Total Fuel Trim

-35% - +35%

Vehicle Speed

Zero MPH (Zero km/h)

⁽¹⁾	Scan tool parameters are with vehicle at idle, upper radiator hose hot, closed throttle, transaxle in Park or Neutral, computer controls in closed loop and accessories off.

⁽²⁾	Varies with barometric pressure and altitude.

⁽³⁾	Varies with engine coolant temperature.

⁽⁴⁾	Canadian and Federal emissions only.

⁽⁵⁾	With all electrical accessories off.

⁽⁶⁾	Varies with coolant temperature. Is off when coolant temperature is less 176°F (80°C).

⁽⁷⁾	Only on 1.3L with enhanced EVAP system.

⁽⁸⁾	With fuel cap removed.

⁽⁹⁾	Varies with amount of fuel in tank should be 70% with a full tank. Scan tool indicates 0" H2O when fuel tank pressure equals barometric pressure.

⁽¹⁰⁾	Counts are 118-138 and vary.

⁽¹¹⁾	Varies within specification.

⁽¹²⁾	Varies with underhood temperature.

⁽¹³⁾	Varies with vacuum and barometric pressure.

⁽¹⁴⁾	If equipped. OFF with steering wheel in straight-ahead position, ON with steering wheel turned.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Scan Tool Data

Use the Manual With the Right Hardware

When to See a Mechanic