Caterpillar Manual (EN)

RENR1241 September 1996 EUI Electronic Systems S e n s o r a n d C o n n e c t o r L o c a t i o n s RPM Control Logic Connector P24/J24 PTO Speed Connector J5/P5 Injector Atmospheric Pressure Sensor Engine Cylinder Head Gnd Stud ECM Connector J2/P2 ECM Connector J1/P1 Electronic Control Module (ECM) 3176C And 3196 Engines For Caterpillar Built Machines Coolant Temperature Sensor Connector J10/P10 Coolant Temperature Sensor Engine Speed/Timing Sensor Connector P9/J9 6AR1-787 7ZR1-545 Inlet Manifold Air Temperature Sensor Turbocharger Compressor Outlet Pressure Sensor Engine Speed/Timing Sensor Filtered Fuel Pressure Sensor D72552 For Use In Challenger 75D and 85D Ag Tractors D74036 Printed in U.S.A.

© 1996 Caterpillar All Rights Reserved RENR1241 8 Page Electronic Governor Fuel Te Fuel Position Electronic 6 Governor 5 Fuel 4 Injection Frc Rat 3 Control Fuel Fu 2 Pos Po 1 FRC Torqu Signals MAPS MAP To Fuel Injectors Speed/Timing Signal Logic Engine RPM Turbo O Pressur Atmosp Pressur Speed/Timing Wheel Speed/Timing Sensor Example Of System Action Speed/Timing Wheel Electrical Current To Injector Solenoid Closed Injector Spill Valve Open Travel Injection Pressure Curve mp Desire Cold Mode Coolant Temp Sensor d Rpm Engine Control Throttle Position Logic Sensor Signals\ 6 To Fuel 5 Injectors 4 (From 3 Fuel 2 Injection 1 Control) EUI Fuel System Rocker Arm Solenoid Spill Valve Fuel Supply (In Head) Relief Fue Filter Valve Tank ECM Cooling Pump Conventional Nozzle Fuel Tank Rat Fu Po ed el s Torqu MAP e S FRC MAPS

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DIAGNOSTIC LAMP A706-GY-16 INJECTOR SOLENOIDS A430-OR D791-YL-16 D791-YL-16 229-BK THIS SCHEMATIC IS FOR THE CH75/CH85 D-SERIES UPDATE (138-7462 CHG 00). COMPONENTS ARE SHOWN INSTALLED ON A FULLY OPERABLE MACHINE WITH THE KEY AND ENGINE OFF AND XMSN SHIFTER IN NEUTRAL. UNLESS OTHER SPECIFIED: ALL WIRE IS 18 GAUGE. NOTE A: PTO SENSOR AND NEUTRAL SWITCH ARE OPTIONAL ATTACHMENTS FOR CHALLENGER 85D ONLY. THIS SCHEMATIC IS FOR THE CH75/CH85 D-SERIES UPDATE (138-7462 CHG 00). A705-BU-16 D791-YL-16 P5 J5 COMPONENTS ARE SHOWN INSTALLED ON A FULLY OPERABLE MACHINE WITH THE KEY AND ENGINE OFF AND XMSN SHIFTER IN NEUTRAL.

A706-GY-16 PTO ATTACHMENT (CHALLENGER 85D ONLY) A704-GN-16 D791-YL-16 A705-BU-16 UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 18 GAUGE.

D790-OR-16 D790-OR-16 A704-GN-16 D790-OR-16 NEUTRAL SW NOTE A L996-WH A703-BR-16 A702-PU-16 A703-BR-16 1 G787-GN 2 3 SPEED/TIMING D790-OR-16 D789-WH-16 D789-WH-16 G788-YL SENSOR GROUND +VS BK OR A B 996-GN-16 998-BR-16 A701-GY-16 D786-BR-16 SIGNAL WH P9 C J9 999-WH-16 A702-PU-16 D789-WH-16 D788-BK-16 D787-GN-16 OR TURBO OUTLET VS A 997-OR-16 A701-GY-16 D811-YL-16 D810-PU-16 PRESS SENSOR SIGNAL GROUND GN YL C B A746-PK-16 993-BR-16 NOTE A J3 P3 ATMOSPHERIC J24 J34 P34 PRESS SENSOR GROUND VS OR YL B A 993-BR-16 997-OR-16 GOV CONTROL SIGNAL GN C P22 J22 A747-GY-16 A747-GY-16 A746-PK-16 710-GN 710-GN 1 POSITION SENSOR G787-GN L996-WH 994-GY-16 450-YL 4 3 2 P11 J11 G788-YL FILTERED FUEL VS OR 997-OR-16 998-BR-16 996-GN-16 201-BK 123-WH 5 GROUND +V BK RD 229-BK 123-WH-14 C980-YL PRESS SENSOR SIGNAL GROUND GN YL 993-BR-16 994-GY-16 995-BU-16 999-WH-16 6 SIGNAL WH C912-GN C912-GN J17 P17 C967-BU-16 477-BK 449-WH A430-OR A751-YL-16 123-WH 614-PU 201-BK C980-YL 229-BK COOLANT TEMP VS OR 997-OR-16 997-OR-16 201-BK ENGINE DIAGNOSTIC SENSOR GROUND SIGNAL BK WH 995-BU-16 993-BR-16 993-BR-16 + J10 P10 J2 P2 449-WH SPEED/TACH SW IN SIG - A 123-WH-14 123-WH-14 INLET AIR TEMP VS OR A 997-OR-16 HOUR METER 477-BK C B 229-BK 229-BK SENSOR GROUND SIGNAL BK WH C B 993-BR-16 C967-BU-16 XMSN SPEED SENDER H J B793-YL B792-BU P21 J21 J30 P30 F G L997-BU FUEL TEMP VS GROUND OR 997-OR-16 201-BK BK WH G737-WH L997-BU 1 2 710-GN 710-GN D E ECAP ENGINE DATA G737-WH 710-GN SENSOR 993-BR-16 SIGNAL WH BK A751-YL-16 LINE J8 P8 J1 P1 J23 P23 D74285 ENG CYL HEAD PTO SPEED SENSOR WH BK D811-YL-16 D810-PU-16 (OPTIONAL 85D ONLY) D74284 RENR1241 8 Page COLOR ABBREVIATIONS ABBREV RD COLOR RED WH WHITE OR ORANGE YL YELLOW PK PINK BK BLACK GY GRAY PU PURPLE BR BROWN GN GREEN BU BLUE SYMBOL DESCRIPTION CIRCUIT CONNECTED CIRCUIT NOT CONNECTED ELECTRICAL CONNECTION TO MACHINE STRUCTURE INTERNAL ELECTRICAL CONNECTION TO SURFACE OF COMPONENT CONNECTOR H# CIRCUIT GROUPING DESIGNATION ATCH WIRE, CABLE, COMPONENT CIRCUIT CONNECTED BLADE, SPADE, RING OR SCREW TERMINAL SPLICE 15 16 21 24 25 34 27 28 22 17 18 12 5 6 13 19 7 9 4 39 11 40 10 26 31 32 38 23 20 8 1 29 37 14 2 3 33 35 36 30 UNUSED UNUSED UNUSED UNUSED UNUSED CYL NO.6 CYL COMMON 5&6 CYL NO.5 CYL NO.4 CYL COMMON 3&4 CYL NO.3 CYL NO.2 CYL COMMON 1&2 CYL NO.1 RETARDER SOL MED/HI RETARDER SOL LOW/HI RETARDER SOL COMM UNUSED PTO SPEED -/TDC- PTO SPEED +/TDC+ UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED TURBO OUTLET PRESS ATMOSPHERIC PRESS FLTRD FUEL PRESS +V TIMING SPEED/TIMING COM SPEED/TIMING COOLANT TEMP INLET AIR TEMP FUEL TEMP UNUSED UNUSED ANALOG SENSOR +V ANALOG SENSOR COM 6 8 5 4 10 3 2 12 1 11 9 2 3 4 9 10 11 36 13 14 38 17 8 19 21 23 39 29 24 20 25 26 15 37 22 27 28 30 31 32 33 34 6 35 5 1 7 40 18 12 UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED DIGITAL SENSOR COM NR/F SW (N.C.) NR/F SW (N.O.) UNUSED UNUSED LAMP FLASH SW THROTTLE INPUT DIAGNOSTIC LAMP UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED + BATTERY UNUSED - BATTERY ECM ATA DATA LINK- GND ATA DATA LINK+ UNUSED STRAP XMSN OUTPUT SPD XMSN OUTPUT SPD 1 3 4 5 6 7 10 9 11 12 8 2 A B C A B C A B C A B C 2 1 2 1

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