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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - SENSOR RANGE CHARTSINTRODUCTION
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Engine Controls - Sensor Range Charts: Introduction

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Introduction

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 may cause driveability problems.

NOTE: Unless stated otherwise in test procedure, perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
ACCELERATOR PEDAL POSITION SENSOR VOLTAGE (MODELS WITH ELECTRONIC THROTTLE CONTROL - EXCEPT 6.6L)

Throttle Position (1) Volts
At Idle
APP Sensor No. 1 Less Than 1.0
APP Sensor No. 2 Greater Than 4.0
APP Sensor No. 3 Greater Than 3.8
Wide Open Throttle
APP Sensor No. 1 Greater Than 2.0
APP Sensor No. 2 Less Than 2.9
APP Sensor No. 3 Less Than 3.1
(1) Measured at sensor, or as seen on scan tool.
ACCELERATOR PEDAL POSITION SENSOR VOLTAGE (MODELS WITH ELECTRONIC THROTTLE CONTROL - 6.6L)

Throttle Position (1) Volts
At Idle
APP Sensor No. 1 .52-.80
APP Sensor No. 2 4.25-4.53
APP Sensor No. 3 3.95-4.13
Wide Open Throttle
APP Sensor No. 1 2.12-2.65
APP Sensor No. 2 2.40-2.93
APP Sensor No. 3 2.76-3.16
(1) Measured at sensor, or as seen on scan tool.
SENSOR TEMPERATURE VS RESISTANCE (EXCEPT TRACKER)

Temperature - °F (°C) (1) Ohms
302 (150) 47
284 (140) 60
266 (130) 77
248 (120) 100
230 (110) 132
212 (100) 177
194 (90) 241
176 (80) 332
158 (70) 467
140 (60) 667
122 (50) 973
113 (45) 1188
104 (40) 1459
95 (35) 1802
86 (30) 2238
77 (25) 2796
68 (20) 3520
59 (15) 4450
50 (10) 5670
41 (5) 7280
32 (0) 9420
23 (-5) 12,300
14 (-10) 16,180
5 (-15) 21,450
-4 (-20) 28,680
-22 (-30) 52,700
-40 (-40) 100,700
(1) Measure resistance across sensor terminals.
SENSOR TEMPERATURE VS RESISTANCE (TRACKER)

Temperature - °F (°C) (1) Ohms
176 (80) 315
158 (70) 435
140 (60) 580
122 (50) 810
113 (45) 940
104 (40) 1150
95 (35) 1360
86 (30) 1600
77 (25) 2000
68 (20) 2400
59 (15) 3000
50 (10) 3600
41 (5) 4600
32 (0) 5700
23 (-5) 7400
14 (-10) 9800
5 (-15) 12,700
-4 (-20) 16,000
(1) Measure resistance across sensor terminals.
FUEL TANK PRESSURE SENSOR VOLTAGE (4.3L)

Value Volts
4.5 in. Hg. Pressure (1.25 kPa) .3-.7
Ambient Pressure 1.3-1.7
14 in. Hg. Vacuum (-3.75 kPa) 4.5
MAP SENSOR VOLTAGE

Throttle Position (1) Volts
At Idle 1.0-1.5
Wide Open Throttle 4.0-4.9
(1) Measured at sensor, or as seen on scan tool. Ensure sensor output changes instantly when intake manifold vacuum is applied and released.
THROTTLE POSITION SENSOR VOLTAGE

Throttle Position (1) Volts
At Idle
Models Without Electronic Throttle Control 0.4-0.9
Models With Electronic Throttle Control
TP Sensor No. 1 0.4-0.9
TP Sensor No. 2 4.8-4.3
Wide Open Throttle
Models Without ElectronicThrottle Control Greater Than 4.0
Models With Electronic Throttle Control
TP Sensor No. 1 Greater Than 3.5
TP Sensor No. 2 Less Than 1.0
(1) Measured at sensor, or as seen on scan tool.
RENDER: 1.0x

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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.