Isuzu engine C22NE / 22LE / 20LE. Service manual - part 52

DRIVEABILITY AND EMISSIONS  6E1-37

ECM PINOUTS

ECM Pinout Table, 32-Pin Red Connector-Row “J2”

PIN

PIN Function

Wire Color

IGN ON

ENG RUN

Refer To

A1

Power Ground A

B/R

0.0V

0V

Appropriate Sensor

A2

Sensor Ground B

B/L

0.0V

0V

Appropriate Sensor

A3

5 Volt Reference Signal

R

5.0V

5V

Appropriate Sensor

A4

Battery Feed

R/W

12V

14V

Chassis Electrical

A5

Battery

R/W

12V

14V

Chassis Electrical

A6

Injector #4 Cyl

G

0V

14V

General Description and

Operation, Fuel Injector

A7

Injector #1 Cyl

G/W

0V

14V

General Description and

Operation, Fuel Injector

A8

Injector #3 Cyl

G/B

0V

14V

General Description and

Operation, Fuel Injector

A9

Inject #2 Cyl

G/R

0V

14V

General Description and

Operation, Fuel Injector

A10

Not Used

-

-

-

-

A11

Not Used

-

-

-

-

A12

Not Used

-

-

-

-

A13

Fuel Pump Relay

G/W

12V

0V

On-Vehicle Service Fuel

Pump Relay

A14

Charcoal Canister Purge

Solenoid Valve

(If applicable)

R/L

12V

14V

-

A15

Not Used

-

-

-

-

A16

A/C Clutch

W/R

0V

0V

-

6E1-38  DRIVEABILITY AND EMISSIONS

ECM Pinout Table, 32-Pin Red Connector-Row “J2”

PIN

PIN Function

Wire Clolr

IGN ON

ENG RUN

Rdfer To

B1

TPS

5 Volt Reference Signal A

G

0V

0V

Appropriate Sensor

B2

TPS

5 Volt Reference Signal B

G

0V

0V

Appropriate Sensor

B3

Not Used

-

-

-

-

B4

Check Engine Lamp

R/Y

0V

14V

Chassis Electrical

B5

Tacho-meter Signal

B/R

12V

8-10V

General Description and

Operation

B6

Not Used

-

-

-

-

B7

Map Input

W

5.0V

(0V=10kpa)

1.0V

(5V=104kpa)

General Description and

Operation, Manifold Absolute

Sensor

B8

Throttle Position Sensor

B

1.0V

1.0V

General Description and

Operation, TPS

B9

Not Used

-

-

-

-

B10

A/C Request Signal

G/B

0V

0V

-

B11

DLC (Digital Input)

B/W

12V

14V

Diagnosis, Serial Data

B12

Not Used

-

-

-

-

B13

IAC ”B” High

L/R

1V

1V

General Description and

Operation, IAC

B14

IAC ”B” Low

L/B

11V

13V

General Description and

Operation, IAC

B15

IAC ”A” Low

L/W

1V

1V

General Description and

Operation, IAC

B16

IAC ”A” High

L

11V

13V

General Description and

Operation, IAC

DRIVEABILITY AND EMISSIONS  6E1-39

COMPONENT LOCATOR

6E1-40  DRIVEABILITY AND EMISSIONS

HO2S(if applicable)

THREE-WAY CATALYTIC CONVERTER
(if applicable)

VEHICLE
SPEED SENSOR
(VSS)

FUEL FILTER

THROTTLE POSITION SENSOR

MAP SENSOR

EVAP PURGE CONTROL 
SOLENOID VALVE

FUEL INJECTOR

IGNITION COIL

KNOCK SENSOR

CRANKSHAFT POSITION SENSOR

HEATED 
OXGEN 
SENSOR
(if applicable)

THROTTLE BODY

IAC VALVE

AIR CLEANER

INTAKE AIR 
TEMPERATURE 
SENSOR