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• Mari Karmen Lopez

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CKP

ECT

EOT

CMP

EOP switch

MAT

ICP

MAP

ELECTRONIC CONTROL SYSTEM DIAGNOSTICS

ENGINE MOUNTED COMPONENTS

MAF/IAT sensor

International

R

R

WARNING

VT 275

To avoid serious personal injury, possible death or damage to the engine or vehicle, read all safety instructions in the "Safety Information" section of Engine Diagnostics Manual EGES-305 before doing diagnostic procedures.

ECM Engine (gray)

Notes

X-1 X-2

Information on this form for vehicle mounted components was current at the time of publication. Updates may be made to introduce product improvements and technical advancements. See correct truck service manual for chassis wiring.

E D C B A 2 1 2 1

2 1

2 1

2 3 1

1

DB-LG LB-R GY-R BR-W LG-BK DB-LG BR-O R-W LG-R LG-R R O BK GY DB W-R P-O Y-R P-O W-LG P BR BK-PK

2 3 1

2 1

1 2 3 4 6 7 8 9 12 13 14 15 16

ACT PWR ACT PWR GND CAN 2 (+) CAN 2 (-) Valve Motor + (U Phase) Valve Motor + (V Phase) Valve Motor + (W Phase) Position Sensor Shield Drain Sensor Supply Position Sensor (U Phase) Position Sensor (V Phase) Position Sensor (W Phase) Sensor Supply Ground

DB-LG BK R-LG LB-W BR-LG G-R P BK R-PK Y-W O-W BR-W BK-PK

8 7 6 1 4 3 2 5

A

IAT MAF Signal Ground VREFA MAP ICP EOP MAT ECT EOT CMP (+) CMP (-) CMP/CKP SHD CKP (+) CKP (-) BCS IPR PWR IPR GPC GPD IAHC IAHD OWL

X1-7 X2-2 X1-6 X1-14 X2-3 X1-20 X1-13 X2-14 X1-8 X2-1 X1-9 X1-10 X1-11 X1-1 X1-2 X2-18 X2-24 X1-12 X1-17 X1-21 X1-18 X2-11 X1-23

CKPO CMPO CAN 2 (+) CAN 2 (-) CAN 2 SHD BOO BPS

X1-19 X1-24 X2-6 X2-13 X2-12 X1-15 X1-16

LG-Y DB-O R-LG LB-W

B

2 1

BK GY R-Y

Mitsubishi EGR Valve BCS actuator

IPR actuator

X3-5 X3-10 X3-30 X3-31

Glow plugs

Cylinder 1

Cylinder 3

X3-7 X3-27 X3-8 X3-4,23 X3-24,25 X3-1,2,3 X3-22,26 X3-28 X3-29

Cylinder 5

4

3

4 1

2

3

4 1

2

3

4 1

2

Glow plug relay To battery power feed on starter

Open coil ground Open coil power Close coil ground Close coil power Open coil ground Open coil power Close coil ground Close coil power Open coil ground Open coil power Close coil ground Close coil power

T-Y LG-BK LG-R LG-O LG-Y O-Y Y-LB O-LB LG-W W-BK W-LB DB

CKPO CMPO CAN 2 (+) CAN 2 (-) VIGN IDM MPR IDM LOGIC PWR IDM MAIN PWR IDM MAIN PWR IDM GND IDM GND ATA (+) ATA (-)

X1-3 X1-17 X1-8 X1-18 X1-1 X1-23 X1-6 X1-24 X1-2 X1-19 X1-5 X1-20

8 Pin connector BPS BOO OWL Starter sol

Injector drain wire ground IAH relay

To battery power feed on starter

2

1 4

3

Cylinder 2

Glow Plug Circuits

2

1 4

3

Cylinder 4

2

1 4

3

Open coil ground Open coil power Close coil ground Close coil power Open coil ground Open coil power Close coil ground Close coil power Open coil ground Open coil power Close coil ground Close coil power

LB-R W-LB O-Y W T-LG DB-O LB-BK DG-LG O-LG BK-PK W-P DG-P

X2-2 X2-17 X2-6 X2-18 X2-1 X2-21 X2-5 X2-22 X2-4 X2-19 X2-8 X2-20

Red

12 Volts (VBAT)

Red

High side driver control

Purple

Injectors (48 Volts)

Blue Green

VREF (5 Volts) Signal circuit

Brown

Data Communication Link

Black

Ground circuit

Black

Low side driver control

A/C switch in control head

Body Builder

T-stat switch

Ignitiion switch

Low-pressure switch

Transmission position switch

High-pressure switch

1A

3

N D

R

2

P

85

1

Starter motor relay

8 2 1 7

A/C 1 clutch relay

X3-1 X3-19 X3-20 X3-22

WIF RPRE RVAR A/C control

X3-23 X4-15 X4-17 X3-11 X3-14 X3-21 X4-6

ECI FPM WEL TACH RAS SCS COO

X3-10 X3-12 X3-13 X3-15 X3-17

AC demand CAN 1 (+) CAN 1 (-) CAN 1 SHD VSS CAL (speedo)

X3-24 X4-18 X4-24 X4-4 X4-12 X3-9 X3-5 X3-7 X3-6 X4-2 X4-1 X3-8 X3-3 X4-20 X4-21

BAP APS Signal Ground VREFB IVS FPC ECM MPR Battery Ground Battery Ground ECM PWR ECM PWR DDS VIGN ATA (+) ATA (-)

2

0 = Off 1 = Acc 2 = Run 3 = Crank 4 = Lock

30

40A

87

To starter solenoid

40A

5

Instrument Panel BAP RPM

MPH

BAP APS / IVS

2

A B C D E F

TMC 9 Connector 8

(316)

72 Park 12

Normally open pedal switch

5A

interlock

Diagnostic connector A (237)

E

5A

G

C

B J

Fuel pump relay

H

1

2

10A

86

1 2

ECM relay

87

IDM relay

1 85

5

30

1

5

1

2

3

2 Fuel 2 pump

WIF probe

Fuel heater

3

10A

20A

-

Act Pwr Gnd VIGN Act Pwr IDM MPR IDM Logic Pwr IDM Main Pwr IDM Pwr Gnd ATA (+) ATA (-) ALT I-Sense A/C Clutch (+) A/C Clutch (-)

From relay B+

D A

+

BK P-O DB-LG R-Y W W BK-W LB-PK T W-BK R-W DB-Y

4 9 10 8 6 12 1 2 3 11 7 5

1 3

F

Cylinder 6

3

86

2 0 4

1

-

4

Schematic Line description

+

2

In-cab cruise switches

Normally closed pressure switch

Yellow Red White Color Cylinder 1 3 5 Cylinder

VEHICLE MOUNTED COMPONENTS

Color code for schematic lines

ECM Chassis (white) X-3 X-4

IDM X-3 X-2 X-1

EGR valve controller

Colored lines on this schematic go to connector terminals for sensors and actuators.

12 Pin connector

6

Glow plugs

1 2 3 Alternator Alternator control power

1 B+ at Starter stud

To starter solenoid

2

A/C clutch

C

A

A

C

EGED-310-1

© 2004 INTERNATIONAL TRUCK AND ENGINE CORPORATION

ELECTRONIC CONTROL SYSTEM DIAGNOSTICS

SIGNAL VALUES (All values with breakout box installed on ECM and harness)

International R VT 275

WARNING: Read safety instructions in Diagnostic Manual EGES-305, before starting diagnostic procedures.

R

Pin

Item

Circuit

Circuit Color

Key ON Signal

Low Idle Actual value

Signal

Data List

High Idle Actual value

Signal

Operating Range

Comments

3400 rpm

0 – Governed speed

DMM set to DCV – Hz, EST pid Engine speed

3400 rpm

0V 0V – 5V 0V – 5V 0 – Governed speed

Ground for engine sensors DMM set to V, EST – Continuous Monitor Session DMM set to V, EST – Continuous Monitor Session DMM set to DCV – rpm 2 , EST – pid Engine speed

0V – B+ 0V – 5V 5V ± 0.5 0V – B+ 0V – B+ 0V – B+ 0V – B+ 0 – Governed speed 0 – 4061 psi 0V – B+ 0V – B+ 0 – Governed speed

Ground shield for CMP/CKP sensors Duty cycle, duty controlled; low side driver Switch – Off = 5V = 0 psi / ON = 0V = 40 psi VREF for engine sensors 0V at normal state, B+ depressed B+ at normal state, 0V depressed 0V = GPC off, B+ = GPC on, EST – Output State Test 0V = IAHC off, B+ = IAHC on, EST – Output State Test DMM set to DCV - Hz 1V = 625 psi, EST – No Start session 0V = GPC off, B+ = GPC on, EST – Output State Test Chassis body builder option only DMM set to DCV – rpm 2

Data List

Actual value

X1 ENGINE CONNECTOR (GRAY) 1 2 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 23 24

CKP (+) CKP (-) SIGNAL GND IAT ECT CMP (+) CMP (-) CMP/CKP SHD IPR EOP VREF A BOO BPS GPC IAHC CKPO ICP GPD OWL CMPO

Crankshaft Position Crankshaft Position Signal ground Inlet Air Temperature Engine Coolant Temperature Camshaft Position Camshaft Position Cam/Crank Shield Injection Pressure Regulator Engine Oil Pressure Voltage Reference A (Engine) Brake On/Off Brake Pressure Switch Glow Plug control Inlet Air Heater Control Crankshaft Position Out Injection Control Pressure Glow Plug Diagnostics Oil Warning Lamp Camshaft Position Out

GY DB GY-R DB-LG LG-R R O BK Y-R BR-O BR-W GY R-Y P-O P LG-Y DB-LG W-LG BK-PK DB-O

0V

650 – 700 Hz

0V Temp. depend. Temp. depend. 0V

0V Temp. depend. Temp. depend. 700 rpm 2

0V

0V

700 rpm

3.3 k Hz

700 rpm

0V Temp. depend. Temp. depend. 3400 rpm 2 0V

5V at 0 psi 5V ± 0.5V 0V Off – B+ On B+ Off – 0V On 0V Off – B+ On 0V Off – B+ On 0 Hz 0.25V 0V Off – B+ On

0V 5V 0V B+ 0V – B+ 0V – B+ 650 – 700 Hz Performance Specs 0V – B+

0 rpm

700 rpm

Temp. depend. Performance Specs Performance Specs 1 – 4V 0V Off – B+ On 0V 1 – 4V Temp. depend. 0V B+

Temp. depend. Performance Specs Performance Specs 1 – 4V 0V – B+ Off/On 0V 1 – 4V Temp. depend. 0V – B+ Off/On B+

Temp. depend. Performance Specs Performance Specs 1 – 4V 0V – B+ Off/On 0V 1 – 4V Temp. depend. 0V – B+ Off/On B+

0V – 7V B+ 0.6V – 1V 0V 0V 0V – B+ 0V Off – B+ On 0V

0V – 7V B+ 0.6V – 1V 0V 0V B+ B+ 0V – 5V

0V B+ 0.6V – 1V 0V 0V B+ B+ 0V – 5V

1V – 4V 1V – 4V 0V Off – B+ On 0V

1V – 4V 1V – 4V 0V – B+ 0V

1V – 4V 1V – 4V 0V – B+ 0V

1V – 4V 1V – 4V 0V – B+ 0V

0V Off – B+ On B+ 0V / 4V – 5V Alt. Depend.

0V Off – B+ On 0V Off – B+ On 4 – 5V Alt. Depend

0V Off – B+ On 0V Off – B+ On 4 – 5V Alt. Depend

0V – B+ 0V – B+ 0V – 5V

B+ B+ 5V ± 0.5 0V Off – B+ On 0V Off 0V Off – B+ On

B+ B+ 5V ± 0.5 0V – B+ 0V B+

B+ B+ 5V ± 0.5 0V-B+ B+ B+

0V – 5V 0V – 5V 5V ± 0.5V 0V Off – B+ ON 0V – B+ 0V – B+

0.7V – 4.2V 0.1V – 1.2V 0.0V – 4.2V 0V

0.7V 0.1V – 1.2V 0.0V – 4.2V 0V

2

40 psi

Off/On

0V 5V 0V B+ 0V – B+ 0V – B+ 3.3 k Hz Performance Specs 0V – B+

700 rpm

3400 rpm

Off/On Off/On 700 rpm

2

40 PSI

Off/On Off/On 3400 rpm Off/On 3400 rpm

X2 ENGINE CONNECTOR (GRAY) 1 2 3 6 11 12 13 14 18 24

EOT MAF MAP CAN 2 (+) IAHD CAN2 SHD CAN 2 (-) MAT BCS IPR PWR

Engine Oil Temperature Mass Air Flow Manifold Air Pressure CAN 2 (Private) Inlet Air Heater Diagnostic CAN 2 Shield CAN 2 (Private) Manifold Air Temperature Boost Control Solenoid Injection Pressure Regulator Power

LG-R LB-R LG-BK R-LG BR BK LB-W R-W W-R P-O

0V – 5V

1 – 4V 0V – B+

0V – 5V 0V – B+ B+

DMM set to V, EST – Continuous Monitor Session DMM set to Hz, EST – Continuous Monitor Session DMM set to V, EST – Continuous Monitor Session Digital signal communication 0V = IAHC off, B+ = IAHC on Output State Test Ground shield for CAN 2 Digital signal communication DMM set to V, EST – Continuous Monitor Session 0V = Not enabled, B+ = enabled, EST- Output State Test Switched Ignition power key On = B+, Key Off = 0V

X3 CHASSIS CONNECTOR (WHITE) 1 3 5 6 7 8 9 10 11 12 13 14 15 17 19 20 21 22 23 24

WIF VIGN ECM MPR Battery GND Battery GND DDS FPC A/C Demand TACH CAN 1 (+) CAN 1 (-) RAS CAN 1 SHD VSS CAL RPRE RVAR SCS A/C control ECI BAP

Water In Fuel ECM Switch Ignition voltage ECM Main Power Relay Control Battery Ground Battery Ground Driveline Disengagement Switch Fuel Pump control Air Conditioner Demand Tachometer Output CAN 1 (Public) CAN 1 (Public) Resume Accel Switch CAN 1 Shield Vehicle Speed Signal Remote Preset (PTO) Remote Variable (PTO) Speed Control Switch Air Conditioner Control Engine Crank Inhibit Barometric Pressure

No/Yes

Yes

No/Yes

Yes

0V – B+ 0V – B+ 0.6V – 1V/B+ 0V 0V 0V – B+ 0V – B+ 0V – 5V

0V = No water, 7V = water in fuel, EST – No/Yes Switched Ignition power key On = B+, Key Off = 0V 0.6V – 1V = MPR On / B+ = MPR Off ECM Ground ECM Ground Key On = 0V in gear / B+ = Park and neutral B+ = FPC On, 0V = FPC Off, EST – Output State Test 5V with A/C switch on, freon switches closed. 0V Off Chassis body builder option only Digital signal communication Digital signal communication Momentary switch 0V at normal state / B+ depressed Ground shield for CAN 1 Chassis body builder option only Chassis body builder option only Chassis body builder option only Momentary switch 0V at normal state / B+ depressed B+ A/C command Off, 0V A/C command On 0V allows cranking / 4 – 5V inhibits cranking DMM set to V, EST – Continuous Monitor session

X4 CHASSIS CONNECTOR (WHITE) 1 2 4 6 12 15 17 18 20 21 24

ECM PWR ECM PWR VREF B COO IVS FPM WEL APS ATA (+) ATA (-) Signal GND

ECM Power ECM Power Voltage Reference B (Chassis) Cruise ON / OFF Switch Idle Validation Switch Fuel Pump Monitor Warn Engine Lamp Accelerator Position Sensor Communication Link Communication Link Signal Ground

Off/On Yes 0%

4.2V 0.1V – 1.2V 0V – 4.2V 0V

Off/On Yes 102%

0V – 5V 0V – 5V 0V – 5V 0V

ECM B+ from ECM relay ECM B+ from ECM relay 5V voltage reference for chassis sensors Cruise control On/Off switch 0V at normal state, B+ pedal depressed B+ = FPC On, 0V = FPC Off, EST – Output State Test Chassis body builder option only 0.7V = 10% / 4.2V = 102% Diagnostic / Programming Diagnostic / Programming Ground for chassis sensors