Pin Voltage Chart

PIN VOLTAGE CHART

PCM Connector/Terminal

Circuit

Condition Voltage

Normal

A/1

⁽¹⁾Tank Pressure Sensor

2-3

Ignition On, Fuel Filler Cap Removed

A/2

HO2S No. 1

Varies From 0.2 To 0.8

Greater Than One Minute At 2000 RPM

A/3

Fuel Level Sensor

0.7

Ignition On, Fuel Tank Full

A/3

Fuel Level Sensor

5.5

Ignition On, Fuel Tank Empty

A/4

Engine Coolant Temperature (ECT) Sensor

0.5-0.9

Ignition On, Coolant Temperature 176°F (80°C)

A/5

Sensor Reference Voltage

4.75-5.25

Ignition On

A/6

Intake Air Temperature (IAT) Sensor

2.0-2.7

Ignition On, Sensor Ambient Temperature (Intake Air Temperature) 68°F (20°C)

A/7

Blank

A/8

Blank

A/9

Mass Airflow (MAF) Sensor

1.0-1.6

Ignition On

A/9

Mass Airflow (MAF) Sensor

1.7-2.0

Engine Running At Idle

A/10

⁽²⁾HO2S No. 2

0.2-0.8

Greater Than One Minute At 2000 RPM

A/11

Throttle Position (TP) Sensor

0.5-1.2

Ignition On, Idle Position

A/11

Throttle Position (TP) Sensor

3.4-4.7

Ignition On, Full Throttle

A/12

Blank

A/13

Manifold Differential Pressure (MDP) Sensor

3.96-5.25

Ignition On

A/13

Manifold Differential Pressure (MDP) Sensor

1.46-2.36

Engine At Idle

A/14

Closed Throttle Position (CTP) Switch

0-1

Ignition On, Throttle At Idle Position

A/14

Closed Throttle Position (CTP) Switch

3-5.25

Ignition On, Throttle Above Idle Position

A/15

Blank

A/16

Blank

B/1

Ground

B/2

Ground

B/3

Camshaft Position (CMP) Sensor

Varies From 0-1 To 3-5.25

Ignition On, Crankshaft Turned Slowly

B/4

Blank

B/5

Blank

B/6

⁽¹⁾EVAP Canister Air Valve

10-14

Ignition On

B/7

⁽¹⁾Tank Pressure Control Solenoid

10-14

Ignition On, Fuel Level 75% Or Less

B/8

TCM Diagnosis Interface (4-Speed)

Cycles From 0 To 5

Ignition On

B/9

HO2S No. 2 Heater

10-14

Ignition On

B/10

TCM (Throttle Valve Opening Signal)

0.94

Ignition On, Throttle Closed

B/10

TCM (Throttle Valve Opening Signal)

0.44

Ignition On, Throttle Open

B/11

Injector No. 1

10-14

Ignition On

B/12

Idle Air Control (IAC) Valve

10-14

Ignition On

B/13

Injector No. 3

10-14

Ignition On

B/14

Ground

B/15

Sensor Ground

B/16

Crankshaft Position (CKP) Sensor (-)

2.0-3.0

Ignition On

B/17

Crankshaft Position (CKP) Sensor (+)

2.0-3.0

Ignition On

B/18

Blank

B/19

Blank

B/20

Blank

B/21

Brake Light Switch (3-Speed)

0-1

Brake Switch Off

B/21

Brake Light Switch (3-Speed)

10-14

Brake Switch On

B/22

Data Link Connector (DLC)

10-14

Ignition On

B/23

HO2S No. 1 Heater

10-14

Ignition On

B/24

Injector No. 2

10-14

Ignition On

B/25

EVAP Canister Purge Valve

10-14

Ignition On

B/26

Injector No. 4

10-14

Ignition On

C/1

PCM Back-Up Power Source

10-14

Ignition On Or Off

C/2

Engine Start Signal

6-12

Engine Cranking

C/2

Engine Start Signal

0-1

Except Engine Cranking

C/3

Duty Output Terminal

C/4

Ignition Trigger Signal

0-1

Ignition On

C/4

Ignition Trigger Signal

0-1 To 4-5

Engine Cranking

C/5

Fuel Pump Relay

0-1

For 3 Seconds With Ignition On

C/5

Fuel Pump Relay

10-14

After 3 Seconds With Ignition On

C/6

Test Switch Terminal

10-14

Ignition On

C/6

Test Switch Terminal

0-1

Ignition On, Terminal Grounded

C/7

Vehicle Speed Sensor (VSS)

Varies From0 to 4-5.25

Ignition On, Drive Wheel Turning

C/8

Blank

C/9

⁽¹⁾A/C Signal

10-14 0-1

Ignition On A/C On

C/10

Main Relay

0-1

Ignition On

C/11

Instrument Cluster Ground

10-14

Nipponseiki

C/11

Instrument Cluster Ground

0-1

Nippondenso

C/12

Power Source

10-14

Ignition On

C/13

Power Source

10-14

Ignition On

C/14

Malfunction Indicator Light (MIL)

0-1

Ignition On

C/14

Malfunction Indicator Light (MIL)

10-14

Engine Running

C/15

EGR Solenoid Vacuum Valve

10-14

Ignition On

C/16

TCC Relay (3-Speed)

10-14

Ignition On

C/16

TCC Relay (3-Speed)

0-1

48 MPH In "D" Range

C/16

Coolant Temp. Signal For TCM (4-Speed)

0-1

Engine Running, Coolant Temperature Less Than 34°F (1°C)

C/16

2.5-3.9

Engine Running, Coolant Temperature Between 34-97°F (1-36°C)

C/16

5.1-6.3

Engine Running, Coolant Temperature Greater Than 97°F (36°C)

C/16

7.7-11.7

Ignition On, Engine Stalled

C/17

Diagnosis Switch Terminal

10-14

Ignition On

C/17

0-1

Ignition On, Terminal Grounded

C/18

EGR Solenoid Vacuum Valve (System Check)

10-14

Ignition On

C/19

⁽¹⁾Power Steering Pressure (PSP) Switch

10-14

Engine Running, Wheel Turned To Stop

C/20

⁽¹⁾ABS Control Module

10-14

Ignition On

C/21

Blank

C/22

Transmission Range Switch (TRS)

0-1 No. 1 at normal operating temperature.

Ignition On, Gear Selector In "P" Or "N"

C/22

- Sensor output is less active than HO2S

10-14

Ignition On, Gear Selector In "R", "D", "2" Or "L"

⁽¹⁾

If equipped.

⁽²⁾

Sensor output is less active than HO2S No. 1 at normal operating temperature.

Fig 1: Identifying PCM Connector Terminals (Tracker)

Courtesy of SUZUKI OF AMERICA CORP.