Engine Controls - Sensor Operating Range Charts: Introduction

NOTE: For identification of ECM/PCM harness connectors and wire terminals, see PIN VOLTAGE/CIRCUIT RESISTANCE CHARTS article.

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.

For individual component and system diagnostic test procedures, see SYSTEM & COMPONENT TESTING article.

CAMSHAFT POSITION (CMP) SENSOR RESISTANCE - ESTEEM (1.6L)

Temperature °F (°C)

⁽¹⁾ Ohms

14-122 (-10-50)

185-275

122-212 (50-100)

240-325

⁽¹⁾	Measured at sensor while disconnected with ignition off.

CAMSHAFT POSITION (CMP) SENSOR VOLTAGE

Application

PCM Connector/Terminal No.

⁽¹⁾ Volts

Aerio (2.0)

C46-10 & Ground

⁽²⁾ 0-5

Esteem (1.6L)

C22-2 & Ground

⁽²⁾ 0-5

Esteem (1.8L)

C20-10 & E99-26

⁽²⁾ 0-5

Grand Vitara (2.5L)

C51-3-9 & C51-3-20

⁽⁴⁾ 0-6

Vitara (1.6L)

C51-2-26 & Ground

⁽²⁾ 0-6

Vitara (2.0L)

C51-2-26 & C51-3-26

⁽³⁾ 0-5.25

XL-7 (2.7L)

C51-1-12 & C51-3-26

⁽⁴⁾ 0-6

⁽¹⁾	Measured at PCM with ignition on.

⁽²⁾	Voltage toggles from 0-1 volt to 4-6 volts (4-5 volts on Aerio & Esteem) as magnet is passed by sensor face (one mm distance).

⁽³⁾	Voltage toggles from 0-1 volt to 4-6 volts as CMP sensor coupling is rotated.

⁽⁴⁾	Voltage toggles from 0-1 volt to 4-6 volts as crankshaft is turned slowly.

CRANKSHAFT POSITION (CKP) SENSOR RESISTANCE

Application	Ohms @ 68°F (20°C)
Aerio (2.0), Esteem (1.8L), Grand Vitara (2.5L), Vitara (2.0L) & XL-7 (2.7L)	485-655
Esteem (1.6L) & Vitara (1.6L)	360-460

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

Temperature °F (°C)	Ohms
32 (0)	5740
68 (20)	2280-2610
104 (40)	1150
140 (60)	584
176 (80)	303-326

FUEL LEVEL SENSOR RESISTANCE

Fuel Level/Application

⁽¹⁾ Ohms

Full

Esteem & Vitara

0-10

Grand Vitara & XL-7

2-4

1/2 Full

Esteem & Vitara

32.5

Empty

Esteem

120

Vitara

90-130

Grand Vitara & XL-7

119-121

⁽¹⁾	See DTC P0461: FUEL LEVEL SENSOR CIRCUIT PERFORMANCE in appropriate SELF-DIAGNOSTICS article for proper testing and repair procedures.

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

FUEL TANK PRESSURE (FTP) SENSOR VOLTAGE

Vacuum In.Hg (kPa)	Pressure psi (kPa)	Voltage
0	0	2-3
2.0 (6.6)	.....	0-2
.....	2.0 (6.6)	3-5

HEATED OXYGEN SENSOR (HO2S) HEATER RESISTANCE

Application

⁽¹⁾⁽²⁾ Ohms

Aerio & Esteem (1.8L)

HO2S-1

2-6

HO2S-2

4-10

Esteem (1.6L)

11.7-15.6

Grand Vitara & XL-7

5-7

Vitara

With Warm-Up Three-Way Catalyst (WU-TWC)

4.5-5.7

Without Warm-Up Three-Way Catalyst (WU-TWC) ⁽³⁾

11.7-14.3

⁽¹⁾	Ohms values apply to both HO2S-1 and HO2S-2 sensors.

⁽²⁾	Measure resistance of HO2S heater at 68°F (20°C).

⁽³⁾	Applies only to HO2S-1.

INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE

Temperature °F (°C)

⁽¹⁾ Ohms

32 (0)

5880

68 (20)

2210-2690

104 (40)

1140

140 (60)

580

176 (80)

290-350

⁽¹⁾	Approximate values are given. See INTAKE AIR TEMPERATURE SENSOR under SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING article for resistance graph and test procedure.

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

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR OUTPUT VOLTAGE (AERIO 2.0L)

Altitude (Feet)

Vacuum (In. Hg)

⁽¹⁾⁽²⁾ Volts

0-2000

28-30

3.3-4.3

2001-5000

25-28

3.0-4.1

5001-8000

22-25

2.7-3.7

8001-10,000

20-22

2.5-3.3

⁽¹⁾	For proper MAP sensor test procedure, see MANIFOLD ABSOLUTE PRESSURE SENSOR in SYSTEM & COMPONENT TESTING article.

⁽²⁾	Voltage should drop in direct proportion to vacuum applied to MAP sensor port (up to 16 In Hg).

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR OUTPUT VOLTAGE (ESTEEM 1.6L)

Altitude (Feet)

Vacuum (In. Hg)

⁽¹⁾⁽²⁾ Volts

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⁾	For proper MAP sensor test procedure, see MANIFOLD ABSOLUTE PRESSURE SENSOR in SYSTEM & COMPONENT TESTING article.

⁽²⁾	Voltage should drop in direct proportion to vacuum applied to MAP sensor port (up to 16 In Hg).

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR OUTPUT (ESTEEM 1.6L)

Vacuum (In. Hg)

⁽¹⁾ Scan Tool Display (kPa)

100

⁽¹⁾	With scan tool installed, ignition on, and specified vacuum applied to MAP sensor.

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

MASS AIRFLOW (MAF) SENSOR VOLTAGE TEST

Application

PCM Connector/Terminal No.

⁽¹⁾ Volts

Aerio (2.0)

Ign. On, Eng. Off

C46-24 & Ground

0.5-1.0

Engine At Idle

C46-24 & Ground

1.3-1.8

Esteem (1.8L)

Ign. On, Eng. Off

C20-24 & Ground

.5-1.0

Engine At Idle

C20-24 & Ground

1.3-1.8

Grand Vitara (2.5L)

Ign. On, Eng. Off

C51-3-20 & C51-3-23

0.5-1.0

Engine At Idle

B/20 & B/23

1.5-1.8

Vitara (1.6L & 2.0L)

Ign. On, Eng. Off

C51-3-10 & Ground

1.0-1.6

Engine At Idle

C51-3-10 & Ground

1.7-2.0

XL-7 (2.7L)

Ign. On, Eng. Off

C51-3-10 & C51-3-5

1.0-1.6

Engine At Idle

C51-3-10 & C51-3-5

1.7-2.0

⁽¹⁾	Voltage should increase as engine speed increases.

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

NOTE: For identification of ECM/PCM harness connectors and wire terminals, see PIN VOLTAGE/CIRCUIT RESISTANCE CHARTS article.

MANIFOLD DIFFERENTIAL PRESSURE (MDP) SENSOR RESISTANCE (ESTEEM 1.8L, GRAND VITARA, VITARA & XL-7)

Vacuum (In. Hg)

⁽¹⁾⁽²⁾ Volts

7.8

2.40-4.40

9.8

2.13-4.13

11.8

1.86-3.86

13.8

1.59-3.59

15.7

1.39-3.32

⁽¹⁾	For proper MDP sensor test procedure, see MANIFOLD DIFFERENTIAL PRESSURE SENSOR - ESTEEM (1.8L), GRAND VITARA, VITARA & XL-7 in SYSTEM & COMPONENT TESTING article.

⁽²⁾	Voltage should drop in direct proportion to vacuum applied at MAP sensor port (up to 16 In. Hg).

THROTTLE POSITION (TP) SENSOR RESISTANCE

Application			Ohms
Esteem
Between Terminals No. 1 & 2			2500-6000
Between Terminals No. 1 & 3
At Idle			100
At Wide Open Throttle			20,000
Grand Vitara,Vitara & XL-7
Between Terminals No. 1 & 3			4000-6000
Between Terminals No. 1 & 2 (Vitara & XL-7)
At Idle			20
At Wide Open Throttle			6000
Between Terminals No. 2 & 3 (Grand Vitara)
At Idle			0
At Wide Open Throttle			4600

THROTTLE POSITION (TP) SENSOR VOLTAGE

Application

⁽¹⁾ Volts

Aerio (2.0), Esteem (1.8L) & Grand Vitara (2.5L) ⁽²⁾

At Idle

.35-.65

At Wide Open Throttle

3.5-4.5

Esteem (1.6L) ⁽²⁾

At Idle

.2-.1.0

At Wide Open Throttle

2.8-4.8

Vitara (1.6L & 2.0L) ⁽²⁾

At Idle

.5-1.2

At Wide Open Throttle

3.4-4.7

XL-7 (2.7L) ⁽²⁾

At Idle

.51-.91

At Wide Open Throttle

3.7-4.4

⁽¹⁾	Ignition on and engine off.

⁽²⁾	Measure voltage at ECM connector terminal No. C46-25 (Aerio), C20-6 (Esteem 1.6L), C20-25 (Esteem 1.8L), C51-3-9, (Vitara 1.6L & 2.0L), C51-3-12 (Grand Vitara), C51-3-9 (XL-7). See PIN VOLTAGE/CIRCUIT RESISTANCE CHARTS article.

VEHICLE SPEED SENSOR (VSS) RESISTANCE (ESTEEM)

Application

Ohms

Esteem

⁽¹⁾ 300-450

⁽¹⁾	With ohmmeter connected to vehicle speed sensor terminals, ohmmeter should alternate between zero ohms and infinity as output shaft revolves.

VEHICLE SPEED SENSOR (VSS) VOLTAGE (ON-VEHICLE)

Application

PCM Connector/Terminal No.

⁽¹⁾ Voltage

Grand Vitara

B/1 and Ground

0-1 to 8-14

Vitara

C51-2-25 & Ground

0-1 to 8-14

XL-7

C51-1-14 & Ground

0-1 to 4-14

⁽¹⁾	With ignition on and right rear tire rotating while holding left rear tire stationary.