Detroit Diesel Engine DDEC II Wiring Diagram

DDEC II Engine SK20627 H 01

CKT FUNCTION

12V POWER (K EY ON)

23

12V POWER (STARTER CRANKING)

29
68

LOW COOLANT PROBE SIGNAL

115

LOW COOLANT SIGNAL

150

ECM GROUND

A150

LOW COOLANT PROBE GROUND

211

JAKE BRAKE ATEC SIGNAL

223

JAKE BRAKE
JAKE BRAKE - FRONT

224

JAKE BRAKE - REAR

225

DASH GROUND

239
240

ECM POWER

241

ECM POWER

242

12V POWER (KEY ON, FUSED)

289

JAKE BRAKE

298

12V POWER (CONSTANT)

354

CRUISE CONTROL "ON" LIGHT
417
419

"CHECK ENGINE" LIGHT
438 "STOP ENGINE" LIGHT

IGNITIO N

439
451

DIAGNOSTIC SIGNAL

ECM
CONNECTOR

A1

508
555

A2
A3

916

B1

419

B2

509

B3

439

C1

901

C2

900
952

C3
D1

P

417

D2
D3

P

E1

451

E2

556

E3

557

F1

542

F2

544

P

F3

528

G1

543

G2
G3

545

H1

P

H2

524
115

H3
J1

541

J2

531

J3

P

505

K1
K2

902

K3

P

ECM POWER
CONNECTOR

241

A

241

B

150

C

150

D

240

E

240

F

CKT FUNCTION

TACH

505

ENGINE BRAKE ENABLE SIGNAL

508

STOP ENGINE SIGNAL

509

PARKING BRAKE-IDLE TIMER

524
528

SHUTDOWN OVERRIDE

531

BRAKE/CLUTCH "ON"

541

CRUISE SET
CRUISE NOT SET

542

BRAKE/CLUTCH "OFF"

543

A543

BRAKE "OFF"

544

CRUISE NOT RESUME

545

CRUISE RESUME
CRUISE "ON" SIGNAL

555
556

VEHICLE SPEED SIGNAL (+)
VEHICLE SPEED SIGNAL (-)

557

CRUISE/PRESSURE SWITCH GROUND

558
900

DATA LINK (+)

901

DATA LINK (-)THROTTLE POSITION SIGNAL

902

CRANK POSITION SIGNAL
THROTTLE POSITION SENSOR POW ER

916

THROTTLE POSITION SENSOR GROUND

952

SWITCH GROUND

953

TACH

972

DDECII ENGINE HARNESS

240

15A
FUSE

953

150

150

150

239

MCD

MS

A

B

C

NOTES:

1) SCHEMATIC FOR DETROIT DIESEL DDECII ENGINE
WITH OPTIONAL JA KE BRAKE, SHUTDOWN SYSTEM
AND IDLE SHUTDOWN TIMER

2) RELAY SHOWN IN NON-ENERGIZED POSITION

3) PRESSURE SWITCHES SHOWN IN NON-PRESSURIZED POSITION

4) PARKING BRAKES ARE RELEASED BY PRESSURE IN THE SYSTEM

5) CLUTCH SWITCH SHOWN WITH CLUTCH ENGAGED

241

241

240

15A
FUSE

556

557

A

5

5

5

5

6

7

298

ROC
DPH
NDP
NDP
NDP
NDP

REPLA C ED CB’S W/15 A FUSES

B-7

RG

ROC

MS

REVISED JAKE INSTLA-5

ROC

MS
RG

REVISED JAKE INSTLA-5

COOLANT
LEVEL
SWITCH

A150

68

CLUTCH
SWITCH

531

A543

543

CLUTCH
PEDAL

H

NORMAL
COOLANT
LEVEL

G

08-30-89
89057-03
03-02-90
36538-02
04-04-90
36548-02

FIREWALL
CONNECTOR

A543
555
902
541

P
542
544
545

P
900
901
916
952
953

524 524
531

528
508
509
505
A150 A150
451

419
115
417
150

A543

A
B

555
C
D

541
E
F

542
G

544
H

545
J
K

900
L

901
M

916
N

952
P

953

A
B

531
C

6868

D

528
E

508
F

509
G

P
H
J

451
K

439439
L

419
M

115
N

417
P

150

JAKE
BRAKE
CONNECTION

SK20627

JJX

NDP

MS

H

NDP

OPTIONAL

P

(PRESSURE RELEASES BRAKES)

CRUISE
ON/OFF
SWITCH

953

558

SHUTDOWN TIMER
PARK ING BRAKE
PRESSURE SWITCH

544

558

545

524

953

P

P

P

508

508

901

900

901

900

FEDCB

DIAGNOSTIC
CONNECTOR

J1922

DATA

DATA

LINK

F2

LINK

CONN

CONN

OPTIONAL SHUTDOWN SYSTEM
OVERRIDE SWITCH

528

(MOMENTARY CONTACT)

439

150

901

900

A

F1

THROTTLE
POSITION
SENSOR

953

DDECII CAB HARNESS

CRUISE
RESUME
SWITCH

439439

9

4

9

1

1

5

6

7

2

9

4

9

5

1

1

2

7

6

CORRECTED PIN CALLOUTSB-5RG

EOF KILL CONNECTION

542

558

541

68
531
A543
558

B
B

A150
150
115
439
439

B

KEY/START HARNESS

9

4

3

P

DDEC II

CAB

HARNESS

MAIN

CAB

HARNESS

DIAGNOSTIC
SWITCH

451

(MOMENTARY CONTACT)

CRUISE
SET/RESUME
SWITCH

03-25-93
12885RG

68
531
A543
558

B
B

A150
150
115
439
439

B

2

3

2

9

509

419

438

419

ENGINE

ENGINE

CHECK

STOP

438

419

150

D

MNH
DPH

E

DPH
MNH

F

MNH

NDP

G

NDP

PARKING
BRAKE
PRESSURE
SWITCH

558

P

(PRESSURE RELEASES
PARKING BRAKES)

DDECII FUSE HARNESS

5 A
FUSE

E

KEY

CRANK

A555

354

CONTROL

CRUISE

354

D

LIGHT

BAR

MS

REV FOR NEW LIGHT BARB-2

MS

5 AMP FUSE WAS 15 AMPC-2

MS

AJC

1) REV D IAGNOSTIC CO NN

B-4

2) ADD J1922A DATAB-4
LINK CONN

MS

CORRECTED PIN CALLOUTS

C-5

ON FIREWALL CONNECTOR

SERVICE BRAKE
PRESSURE
SWITCH

NO
PARKING
BRAKES OFF

NO

B543

PARKING
BRAKES ON

NC

68
A150
150
115
439

B

531

DDEC II
COOLANT
LEVEL
CONTROL
MODULE

NC

P

(PRESSURE APPLIES
SERVICE BRAKES)

BRAKE(S) ON

BRAKE(S) OFF

CRUISE
LIGHT
RELAY

439

09-04-90
35989-08RG
06-24-91
12503JJS
10-03-91
91079-05RG

12-21-92
12822JJS

SERVICE BRAKES ON

531

SERVICE BRAKES OFF

A543

555439

NONE

A555

SCHEMATIC - DETROIT DIESEL DDECII

PETERBILT 379 FAMILY

GND

BATTERY

+12V

SPEED SENSOR

ABS

ABS CONN
(OPT)

ON/OFF

225
224
239
ABS
239
A242

LO
HI

A

225
224

B

239

C
D

ABS
239

E

A242

F

MED

HI

JAKE BRAKE
MODULE

B

OPTIONAL JAKE BRAKE

C

C

2

2

1

1

E

E

1

1

T

T

A

A

A

2

223

2

3

B

5

508

0

8

C

289

D

2

8

9

2

225

2

5

E

2

2

2

2

4

4

F

C

239

DASH

239

GROUND

(OPTIONAL)

ATEC CONNECTION

211

223

224

242

225

289

MAIN CAB HARNESS
ENGINE BRAKE SWITCH
CONNECTORS

7

PD803064.FRM