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Engine Controls - Sensor Operating Range Charts - 2.5L: Introduction

Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a diagnostic trouble code, but it may cause driveability problems.

NOTE: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
CAMSHAFT POSITION (CMP) SENSOR VOLTAGE

ECM/PCM Terminal (1) (2) Voltage
SGC Signal 5 (1 pulses/rev)
(1) See PIN VOLTAGE CHART S article for terminal identification.
(2) Rotate distributor drive by hand while measuring output voltage.
CRANKSHAFT POSITION (CKP) SENSOR RESISTANCE

Terminals (1) Temperature Ohms
"A" & "B" 68°F (20°C) 520-850
(1) See appropriate SYSTEM/COMPONENT TESTS article for terminal identification.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

Temperature Ohms
68°F (20°C) 2200-2700
176°F (80°C) 290-350
EGR BOOST SENSOR VOLTAGE

Vacuum Voltage
5.91 in. Hg 0.783-0.849
13.8 in. Hg 1.772-1.912
30.0 in. Hg 3.92-4.08
EGR VALVE POSITION SENSOR RESISTANCE (1)

Terminals Ohms W/ No Vacuum Applied Ohms @ 5.9 in. Hg
"A" & "B" 2700 2700
"A" & "C" 500 2700
"B" & "C" 2400 100
(1) See appropriate SYSTEM/COMPONENT TESTS article for terminal identification.
EGR VALVE POSITION SENSOR VOLTAGE (1)

Terminals Volts W/ No Vacuum Applied Volts @ 5.9 in. Hg
"A" 0 0
"B" 4.5-5.5 4.5-5.5
"C" 0.8 4.8
(1) See appropriate SYSTEM/COMPONENT TESTS article for terminal identification.
HEATED OXYGEN SENSOR (HO2S)

Operating Condition Volts
Acceleration 0.5-1.0
Deceleration 0.0-0.5
KNOCK SENSOR RESISTANCE

Temperature (1) Ohms
68°F (20°C) 5600
(1) Measure resistance between knock sensor terminal "A" and knock sensor body.
TP SENSOR VOLTAGE

ECM/PCM Wire Color Closed Throttle Volts WOT Volts
Pink/Green (3B) (1) 0.1-1.1 2.8-4.5
(1) ECM/PCM terminal pin No. in parentheses.
THROTTLE POSITION (TP) SENSOR CONTINUITY

Condition (1) Continuity Between Terminals "C" & "D"
MX-6 & 626
.006" (.15 mm) Yes
.020" (.5 mm) No
(1) Insert feeler gauge of specified thickness between throttle lever and throttle stop screw. See appropriate SYSTEM/COMPONENT TESTS article for terminal identification.
VOLUME AIRFLOW SENSOR TERMINAL RESISTANCE

Terminals (1) Fully Closed Ohms Fully Open Ohms
E2 & Vs 68°F (20°C) 20-600 20-1000
E2 & Vc 68°F (20°C) 200-400 200-400
E2 & THA (2)
-4°F (-20°C) 10,000-20,000 10,000-20,000
68°F (20°C) 2000-3000 2000-3000
140°F (60°C) 400-700 400-700
(1) See appropriate SYSTEM/COMPONENT TESTS article for terminal identification.
(2) Intake air temperature sensor.