Read CAT C10/C12, 3176B, 3406E Engine Schematic, SK24807 text version

CAT C10/C12, 3176B, 3406E Engine Schematic

ENGINE POWER RELAY

453 700 A508 508 A508 457 15 AMP 453 239 DIAGNOSTICS FUSE 453 10 AMP 454 ECM FUSE 455

SK24807

D

01

KEY

23

A23

A23

PTO ON/OFF SWITCH (SEE NOTE 5)

PARKING BRAKE SWITCH (NC)

(OPENS AT 2-6 PSI)

SHUTDOWN CONNECTION

BRAKESAVER/ SHUTDOWN RELAY (SEE NOTE 6)

A12 12 C554 554 557 466 A466

BRAKESAVER FUSE

23

226 10 AMP

A464

457

SPS IDLE TIMER

BLK

TO A239 SPARE CIRCUIT

SERVICE BRAKE SWITCH (NC)

(OPENS AT 2-6 PSI)

YEL

RED

FUSE/RELAY HARNESS

ENGINE FAN RELAY

226 A220 239 A220

FAN FUSE 220 10 AMP

JAKE BRAKE ON/OFF SWITCH

OFF ON

JAKE BRAKE RANGE SWITCH ABS CONNECTOR

554 A554 LOW MED HIGH

(SEE NOTE 6)

522 A464 464

457

IGN BAT

12 23 X A12

224

BRAKESAVER APPLICATION SWITCH

225

IGNITION SWITCH

23

CAT COLD DASH SHUTDOWN SWITCH

X

PARKING BRAKE SW (NC) (OPENS AT 2-6 PSI)

(NC)

(OPENS AT 2-6 PSI)

A466

557 554 522 A508 466 464 457 455 454 700

12 A12

239 226 220

MARK IDLE TIMER

CONST PWR MAIN CAB HARN

19

19 A466

19 239

19

CONST PWR ROOF HARN

BRAKESAVER AUTO/MAN SWITCH

OFF ON

12 11 10 557 9 554 8 522 7 A508 6 466 5 464 4 457 3 455 2 454 1 700

B A

C B A

A466

12 A12

239 226 220

CHASSIS GND

SHUTDOWN RELAY

554 557

B554 460 B554

CAT ECM CONNECTOR (40-PIN)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 418 569 552 576 577 455 417 A508 551 579 581 239 225 464 463 578 580 197 224 461

ENGINE HARNESS FIREWALL CONNECTOR

418 417 576 455 A508 579 581 225 464 463 578 580 457 224 461 419 552 551 462 466 468 522 582 458

A 418 B 417 C D 576 E F 455 G H A508 J K 579 L 581 M N 225 P 464 Q 463 R 578 S 580 T 457 U 224 V 461 W 419 X 552 Y 551 Z a 462 b 466 c 468 d 522 e f 582 g 458

CAB HARNESS

239 BRAKESAVER AUTO/MANUAL SOLENOID

454

419 568 465 462 660 468 522 457

WARNING BEEPER

661

354 461 CRUISE ON/OFF SWITCH

582 567 458 CRUISE SWITCH SET/RESUME

662 466

576 700 699 BATTERY EVENT RECORDER DIAGNOSTIC POWER FUSE/RELAY POWER

A B T A B S

A B C D A B C D COOLANT LEVEL SENSOR

A B T A B S

A B T A B S

A B C A B C RETURN WH BK RD SIGNAL

J11 P11

A B T A B S

A B T A B S

A B C D E F

DIAGNOSTIC CONNECTOR (AND CAP) J1587 ATA DATA LINK AND CAP J1922 ATA DATA LINK AND CAP CONNECT AT MAIN CAB CIRCUIT BREAKER CONNECT TO SPARE POWER CONNECTION #3 USE 20 AMP FUSE

J1587 ATA DATA LINK AND CAP

J1939 DATA LINK AND CAP

GROUND TO CYLINDER HEAD STUD CLUTCH SWITCH

ROAD SPEED SENSOR

(NO) AUTOSHIFT J1939 (OPTION)

(SHOWN WITH CLUTCH ENGAGED)

THROTTLE POSITION SENSOR

(PWM)

C0NNECT TO SPEEDO HARNESS SPARE

A508

438

CKT

12 A12 23 197 220 224

FUNCTION

CAT ELEC SYSTEM SHUTDOWN CAT ELEC SYSTEM SHUTDOWN 12V POWER (KEY ON) VEHICLE SPEED IN (+) ENGINE FAN ENGINE BRAKE (FRONT) ENGINE BRAKE (REAR) SPARE 12V (KEY ON, FUSED) (-) GROUND DASH POWER (KEY ON, FUSED) DASH ILLUMINATION FUSED UNSWITCHED POWER MAIN ACCESSORY POWER

CKT

454 455 457 458 461 462 463 464 465 466 468 508 A508

FUNCTION

DIAGNOSTICS POWER ECM POWER GROUND-SENSORS THROTTLE SENSOR OUTPUT CRUISE - ON CRUISE - SET CRUISE - RESUME SERVICE BRAKE SWITCH CLUTCH SWITCH ENGINE BRAKE ENABLE WARNING BEEPER PTO ON/OFF SWITCH PTO VALIDATION SIGNAL ENGINE FAN DISABLE J1922 DATA LINK (+) J1922 DATA LINK (-) BRAKESAVER POWER

CKT

C554 554 557 567 568 569 576 577 578 579 580 581 582 660 661 662 699 700

FUNCTION

BRAKESAVER POWER BRAKESAVER POWER BRAKESAVER ON/OFF +5V LOW COOLANT SENSOR COOLANT LEVEL LOW COOLANT LEVEL NORMAL BATTERY EVENT RECORDER ECM GROUND STUD SPEEDOMETER (+) SPEEDOMETER (-) TACHOMETER (+) TACHOMETER (-) +8V THROTTLE PEDAL

NOTES:

1) SCHEMATIC FOR CATERPILLAR 3406E/3176 ENGINES IN CONVENTIONAL MODELS. 2) ALL PRESSURE SWITCHES SHOWN NOT PRESSURIZED. 3) ALL RELAYS SHOWN NOT ENERGIZED. 4) CLUTCH SWITCH SHOWN WITH CLUTCH ENGAGED (POWER TO THE DRIVE WHEELS.) 5) CONNECT PTO TOGGLE SWITCH IN SERIES WITH THE PARKING BRAKE SWITCH ONLY WHEN SEPARATE SWITCH ON DASH OPTION TO ENGAGE PTO IS REQUIRED. 6) BRAKESAVER AND IDLE TIMER SHUTDOWN OPTIONS CANNOT BE USED TOGETHER.

225 226 239 242 253 298 304 354 417 418 419 438 453

CRUISE CONTROL "ON" LIGHT

522

DATA LINK (+) DATA LINK (-) CHECK ENGINE LIGHT WARNING LIGHT ENGINE POWER

J1939 DATA LINK (SHIELD) J1939 DATA LINK (+) J1939 DATA LINK (-)

DIAGNOSTIC POWER FUSE/RELAY POWER

551 552 A554 B554

BRAKESAVER POWER

-

+

-

460

CHASSIS GND (SHUTDOWN OPTION)

CYLINDER HEAD GROUND STUD

CRUISE SWITCH ILLUMINATION 438 468 253 239

OFF ON

242 457 457

SET NONE RES

462 463

10 AMP

20 AMP

5 AMP

220

239 197

A508

699 418 417

239

457 465

418 417

569 567 457 568

458 457 582

418 417

552 551

298

298

298

660

577

419 438

354

660 662 661 C B A

220

TO ENGINE HARNESS

354

220

226 A508 242 239 419 438

POWER

354

220

419

WARNING LIGHT BAR CONNECTORS (MAIN CAB HARNESS)

SERVICE ONLY

E.C.N. NO. DATE BY 9801586 12-21-98 J.M.WATSON REM

SK24807.FM

Information

CAT C10/C12, 3176B, 3406E Engine Schematic, SK24807

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