Engine Controls - Sensor Operating Range Charts: Introduction

NOTE: For identification of ECM/PCM harness connectors and wire terminals, see PIN VOLTAGE 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 VOLTAGE

Application

PCM Connector/Terminal No.

⁽¹⁾ Volts

Aerio (2.0)

C46-10 & Ground

⁽²⁾ 0-5

Grand Vitara (2.5L)

C51-3-9 & C51-3-20

⁽⁴⁾ 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)
All Models	485-655

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

Grand Vitara & XL-7

2-4

Vitara

0-10

1/2 Full

Vitara

32.5

Empty

Grand Vitara & XL-7

119-121

Vitara

90-130

⁽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

Ohms

Aerio

HO2S-1

2-6

HO2S-2

4-10

Grand Vitara & XL-7

5-7

Vitara

With Warm-Up Three-Way Catalyst (WU-TWC) ⁽¹⁾

4.5-5.7

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

11.7-14.3

⁽¹⁾	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 (IAT) 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)

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).

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

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 (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 CHARTS article.

MANIFOLD DIFFERENTIAL PRESSURE (MDP) SENSOR OUTPUT VOLTAGE (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 Fig 1 .

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

Fig 1: Identifying Tank Pressure Sensor Terminals

Courtesy of SUZUKI OF AMERICA CORP.

THROTTLE POSITION (TP) SENSOR RESISTANCE

Application

⁽¹⁾ Ohms

Aerio

Between Terminals No. 1 & 2

100-6500

Between Terminals No. 1 & 3 ⁽²⁾

4000-6000

Grand Vitara

Between Terminals No. 1 & 3

4000-6000

Between Terminals No. 2 & 3 ⁽²⁾

0-4600

Vitara

Between Terminals 1 & 2 ⁽²⁾

20-6000

Between Terminals 1 & 3

4000-6000

XL-7

Between Terminals No. 1 & 2 ⁽²⁾

20-6000

Between Terminals No. 1 & 3

4000-6000

⁽¹⁾	See figure for terminal identification Fig 2 .

⁽²⁾	Varying depending on degree of throttle valve opening.

Fig 2: Identifying Throttle Position (TP) Sensor Terminals

Courtesy of SUZUKI OF AMERICA CORP.

THROTTLE POSITION (TP) SENSOR VOLTAGE

Application

⁽¹⁾ Volts

Aerio ⁽²⁾⁽³⁾

At Idle

.35-.65

At Wide Open Throttle

3.5-4.5

Grand Vitara ⁽²⁾⁽³⁾

At Idle

.35-.65

At Wide Open Throttle

3.5-4.5

Vitara ⁽²⁾⁽³⁾

At Idle

.5-1.2

At Wide Open Throttle

3.4-4.7

XL-7 ⁽²⁾⁽³⁾

At Idle

.49-.91

At Wide Open Throttle

3.76-4.36

⁽¹⁾	Ignition on and engine off.

⁽²⁾	Measure TP sensor voltage using Suzuki scan tool connected to DLC and ignition switch in LOCK position. See Fig 3 .

⁽³⁾	With engine at normal operating temperature.

Fig 3: Identifying Suzuki Scan Tool To DLC

Courtesy of SUZUKI OF AMERICA CORP.

VEHICLE SPEED SENSOR RESISTANCE

Model

Location

⁽¹⁾ Ohms

Aerio

Tranxaxle

648-792

Grand Vitara

Transmission

369-451

Vitara & XL-7

Transmission

387-473

⁽¹⁾	At 68 Degrees F.

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.