Sensor Operating Range Charts

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

Temp. °F (°C)	Ohms
32 (0)	5740
68 (20)	2280-2630
104 (40)	1150
140 (60)	584
176 (80)	305-331

INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE

Temp. °F (°C)	Ohms
32 (0)	5880
68 (20)	2210-2690
104 (40)	1140
140 (60)	580
176 (80)	290-350

CAUTION: Damage to MAP sensor will occur if connections are made incorrectly.

MAP SENSOR OUTPUT VOLTAGE (OFF-VEHICLE)

Altitude (Feet)

Vacuum (In. Hg)

⁽¹⁾⁽²⁾ Output Voltage

0-2000

28-30

3.1-3.6

2001-5000

25-28

2.8-3.4

5001-8000

22-25

2.6-3.1

8001-10,000

20-22

2.4-2.9

⁽¹⁾	Voltage should reduce when up to 15 in. Hg of vacuum is applied to MAP sensor.

⁽²⁾	MAP sensor output voltage is tested with three 1.5-volt batteries connected in series (output 4.5-5.0 volts). Positive lead of batteries is connected to VIN terminal. Negative lead of batteries is connected to ground terminal. Check output voltage between VOUT terminal and ground.

MAP SENSOR OUTPUT VOLTAGE (ON-VEHICLE)

Altitude (Feet)

Vacuum (In. Hg)

⁽¹⁾⁽²⁾ Output Voltage

3.5-3.8

1000

3.4-3.7

2000

3.3-3.6

3000

3.2-3.5

4000

3.1-3.4

5000

3.0-3.3

6000

2.9-3.2

7000

2.8-3.1

8000

2.7-3.0

9000

2.6-2.9

10,000

2.5-2.8

⁽¹⁾	MAP sensor output voltage is tested with coupler connected to ECM. ECM is located near glove box. Before testing MAP sensor output voltage, ensure ECM supply voltage is 4.75-5.25 volts at connector terminal B1 (Light Green wire) and terminal B9 (Light Green/Black wire).

⁽²⁾	Output voltage is checked at ECM connector terminal B3 (Light Green/Red wire) and terminal B9 (Light Green/ Black wire). Start engine, if possible, and see if output voltage varies.

CAUTION: Blowing compressed air through mass airflow sensor will damage it.

POWER STEERING PRESSURE SIGNAL VSV (IF EQUIPPED)

Application

Ohms

Swift

⁽¹⁾ .33-.39

⁽¹⁾	Measure between power steering VSV terminals.

THROTTLE POSITION (TP) SENSOR RESISTANCE

Application	Ohms
Between Terminals "A" & "C"	100-100,000
Between Terminals "A" & "D"	2870-5330

VEHICLE SPEED SENSOR (VSS) RESISTANCE

Application

Ohms

Swift

⁽¹⁾ *

⁽¹⁾	With ohmmeter connected to vehicle speed sensor terminals, ohmmeter should alternate between zero and infinity 4 times per sensor shaft revolution.