LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Geo >> 1997 >> Metro Base >> Repair and Diagnosis >> Engine Performance >> Sensor Range Charts >> Engine Controls - Sensor Operating Range Charts >> Introduction >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Engine Controls - Sensor Operating Range Charts: Introduction: Notes

Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a 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 RESISTANCE

Temperature Ohms
14-122°F (-10-50°C) 185-275
122-212°F (50-100°C) 240-325
CRANKSHAFT POSITION (CKP) SENSOR

Temperature Ohms
68°F (20°C) 360-460
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

Temperature °F (°C) Ohms
0 (-18) 14,650
19 (-7) 8100
39 (4) 4780
70 (21) 2350
100 (38) 1250
160 (71) 400
210 (99) 190
FUEL INJECTOR RESISTANCE

Application Ohms
Metro & Firefly (Canadian) 0.5-1.5
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE

Temperature °F (°C) Ohms
0 (-18) 14,800
19 (-7) 8250
39 (4) 5200
70 (21) 2500
100 (38) 1300
160 (71) 450
210 (99) 200