Manifold Absolute Pressure (Map) Sensor

For information on MAP sensor, see ENGINE SENSORS & SWITCHES in the SYSTEM/COMPONENT TESTS article.

OXYGEN SENSOR VOLTAGE RANGE

Application

Voltage Output

O2S-1/HO2S-1

⁽¹⁾ 100-900 mV

HO2S-2

⁽²⁾ 100-900 mV

⁽¹⁾

On front oxygen sensor, voltage output should be active and constantly fluctuate within voltage range. Front oxygen sensor measures oxygen content in exhaust gases before catalytic converter. With high oxygen content/lean mixture, voltage should be 100 mV. With low oxygen content/rich mixture, voltage should be 900 mV.

⁽²⁾	On rear oxygen sensor, voltage output should be inactive or lazy within voltage range. Rear oxygen sensor measures oxygen content in exhaust gases after catalytic converter. PCM determines catalytic converter efficiency by comparing output from both oxygen sensors.

OXYGEN SENSOR HEATER RESISTANCE

Application	Ohms
Prizm	11.7-14.3

THROTTLE POSITION (TP) SENSOR RESISTANCE

Measure ResistanceBetween Terminals ⁽¹⁾

Ohms

E2 & IDL

⁽²⁾ 0-2300

E2 & IDL

⁽³⁾ Infinity

E2 & VC

2500-5900

E2 & VTA

⁽⁴⁾ 200-5700

E2 & VTA

⁽⁵⁾ 2000-10,200

⁽¹⁾	To identify TP sensor terminals, see Figure .

⁽²⁾	With .016" (.40 mm) feeler gauge installed between throttle stop screw and lever.

⁽³⁾	With .035" (.89 mm) feeler gauge installed between throttle stop screw and lever.

⁽⁴⁾	With zero clearance between throttle stop screw and lever.

⁽⁵⁾	Throttle valve at fully open position.