BAIC HL940A Service Manual & Electrical System Guide PDF Download (EN)

SECTION 7 ELECTRICAL SYSTEM SECTION 7 ELECTRICAL SYSTEM GROUP 1 COMPONENT LOCATION GROUP 1 COMPONENT LOCATION 1. LOCATION 1 1.

LOCATION 1 9 13 1 2 4 3 940A7EL20 1 Kick down button 2 Horn button 3 FNR switch 4 FNR select button 5 Hone button 6 Multi function switch 7 Hazard switch 8 Gear select lever 9 Radio & USB player 10 Aircon & heater switch 11 Monitor 12 Starting switch Starting button (opt) 13 Work load button 14 Parking brake switch 15 Pilot cut off switch 16 Air compressor switch (opt) 18 Exhaust system cleaning switch 19 Engine control unit (ECU) 20 Camera monitor (opt) 21 Differential lock switch (opt) 22 Emergency test switch (opt) 7-1 5 6 7 8 Fingertip (opt) 19 10 20 14 11 15 21 16 18 13 1 12 22 P M A AIR

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2. LOCATION 2 2. LOCATION 2 1 2 3 4 9 10 11 12 13 14 960A7EL21 1 Head lamp 2 Horn 3 Angle sensor 4 Work lamp 5 Machine control unit (MCU) 6 Transmission control unit (TCU) 7 Fuse and relay box 8 Master switch 9 Start relay 10 Fuel sender 11 Battery relay 12 Battery 13 Rear combi lamp 14 Number plate lamp 15 Camera (opt) 16 Work lamp 17 Control unit (electro hydraulic & joystick steering) 19 Engine hood open switch 7-2 19 8 17 5 ENGINEMACHINETRANSMISSION 6 7 15 16 1

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- 1 CAM1 VCC(8V) CAM1 GND CAM DIFF - CAM DIFF + SERVICE TOOL 4 2 3 AAVM MONITOR RS232 RX 14 15 6 TRIGGER 2 CAM 2 GND RS232 TX 16 20 CAM 2 POS CAM 2 NEG TRIGGER 1 CAM 2VCC 19 4 3 5 MAIN GND MAIN ACC(24V) CAN2 HIGH 791 Y B R CAN2 LOW 13 12 11 10 790 L 609A CN-58B CN-431 PROGRAM DUMP RS-232(1) RX RS-232(1) TX SPARE_RS-232 GND SPARE SPARE A22 A32 A27 A31 A21 A12 A38 SPARE_PEDAL POSITION1 A08 B39 W R Br 781 782 780 SPARE_PEDAL POSITION1 SEAT BELT WARNING SPARE_5V+ B24 A07 B40 A09 A06 SPARE_PEDAL POSITION2 DIFF. LOCK MANUAL HOUR METER_HIGH SPARE_5V+ A10 A26 GR GrY 629 AUTO GREASE LAMP(GREEN) AUTO GREASE LAMP(RED) A16 DIFF.

LOCK AUTO A37 A36 752 753 Gr R 635 G 636 G8 COUNT_WEIGHT_SET SWITCH B02 B12 A17 L VBr GrW 913 922 751 BATTERY POWER(+24V) A03 A01 A02 GW 630 IGNITION RY MIRROR HEAT RY BUCKET POSITION SENSOR POWER IG(+24V) BATTERY POWER(+24V) REF.

POWER +5V B37 B30 A05 LW OrW YOr Br 743 746 741 623 BOOM POSITION SENSOR AIRCON RUN SIGNAL B04 A29 Gr W 380 235 234 B09 WORK LAMP FRONT A14 DRIVING LIGHT RELAY A13 ILLUMINATION LIGHT RELAY B21 FUEL WARMER RELAY B03 WORK LAMP REAR B14 G G VW Y L 134 144 181 153 SPARE_ECO FEELING SIGNAL CAN2 LOW CAN2 HI A34 A24 Y L 790 791 A18 A15 W B G V 722 723 393 658 657 ----- MCU ----- REVERSE FAN CONTROL ALT LEVEL COOLING FAN EPPR- COOLING FAN EPPR+ B01 B33 B10 B20 R COOLANT LEVEL SENSOR (9SA :

AIR CLEANER) GROUND_SENSOR FUEL LEVEL SENSOR HYD TEMP SENDER B22 B23 A35 B25 A35 WL 694 716 ROr WR W LW 706 711 693 A28 A30 AXLE OIL TEMP (FRONT) AXLE OIL TEMP(REAR) A11 662 663 GW WG Br 358 680 DIFFERTIAL LOCK PR SIGNAL BOOM HEAD PR SNENSOR BOOM ROD PR SNENSOR B36 B29 B26 BOr RW Br BW 538 539 467 993 994 995 672 676 668 736 735 BRAKE PRIORITY_PR SIGNAL CAN(1)-H CAN(1)-L CAN_SHIELD(GROUND) PARKING OIL LOW PS BRAKE OIL LOW PS B31 B32 B11 B13 A23 A33 A25 B34 B27 B38 R VW B ELEC. STEERING PUMP RELAY NEUTRAL SIGNAL(24V) ANTI-RESTART RELAY LW VW V L Y SPARE B21 SPARE ELEC. STEER PUMP PS ELEC.

STEER MAIN PUMP PS GND(MAIN) GND(MAIN) A04 A19 B35 B28 Or V 731 B 731 B 660 661 BATTERY RELAY A20 RW 532 REAR WIPER SPEED REALY B05 B08 B19 B07 B18 B17 B16 REAR WIPER WASHER REALY ATACH LOCK RELAY ATACH UNLOCK RELAY BEACON RELAY MIRROR HEAT REALY FRONT WIPER 1ST SPEED REALY OrW Br R V 122 254 306 336 INPUT FRONT WASHER SIGNAL INPUT FRONT INT SIGNAL A40 G W W 334 412 413 RIDE CONTROL RELAY B06 AUTO GREASE RELAY A39 B15 LOr Gr BW L 322 304 302 328 CN-58A NC CAN2-SHILD 11 CAN2 LOW 13 CAN2 HI 12 7 B L Y 792 791 790 IG 24V BATT.

24V 1 2 3 4 5 6 609 V 650 CLUSTER HIGH BEAM RH TURN LH TURN NC R GOr Or Gr 15 10 16 8 GND GND 9 14 607 607 B B CAM CH3 DIFF(+) CAM CH3 DIFF(-) CN-56 4 3 2 1 626 BrW Y 616 618 620 624 467 538 539 3.0 551 533 G Br 86 87 85 87a 86 86 87 85 87a 86 87a 87a 85 87 85 87 CAM GND CAM VCC, 6.5V BATT. 24V BATT.

24V 625 CN-57C 2 3 Gr B R 650 F8 G53 B CR-35 R 17 30 30 R 17 NEUTRAL RY FUSE & RELAY BOX1- INSIDE 7 17 CAMERA SHIELD 1 IG 24V 609A R C7 570 540 600 R 540 600 600 LW 538 ROr ROr 30 86 87 85 87a 86 87a 85 87 MONITOR 5 7 618 CR-38 30 86 87 85 87a 86 87a 30 85 87 R 16 19 6 8 14 15 16 20 616 626 625 E9 C5 375 377 622 536 30 SPARE CAN2-SHILD CAN2 LOW CAN2 HI NC 18 995 791 790 Y L B B Y L 790 791 995 A2 E5 280 280 252 254 V L RW RW CR-XX 30 86 87 85 87a 86 87a 85 87 R13 GROUND GROUND 11 12 NC 13 CN-57 B B 607 607 H3 252 544 CR-56 30 R 12 345 RY 344 R 551 Br 30 86 87 85 87a 86 87a 85 87 IG ECM RY CR-30 30 R 11 B+ 5 B R O L F Lo Hi RESISTOR NC C GW 500 RW 502 86 G53 375 538 377 371 30 86 87 85 87a 86 30 86 87 85 87a 86 87a 87a 30 30 85 87 85 87 SLO RELAY J1939 CAN A+ J1939 CAN A- RS-A1 994 993 Y L B A A1 CR-11 85 86 87 85 B 87 551 Br 755 BW CR-381 30 86 87 85 87a 86 87a 85 87 R 15 R 15 IG EHCU RY MULTI FUNCTION SWITCH C 8 WB CS-11 504 503 186 F1 F2 B7 H8 F4 D5 FLASHER UNIT T 256 RW R 14 CR-40 30 7 Lo 2 BW Y L W 6 Hi 1 2 3 4 YOr Y R 186 G 180 502 503 504 Or GOr 503 504 A2 791 G53 12 11 CAN2 LOW GROUND 3 BG R II I BWG 4 C 5 6 7 8 RW 504 503 186 184 184 182 182 180 G4 790 L 3 4 5 9 SERIAL "1"_H(TX) SERIAL "1"_L(RX) GROUND-RS232 KEY IG(24V) CAN2 HI REMOTE MANAGEMENT UNIT O J O I L BVi G 4 3 5 CS-12 1 2 3 4 5 6 LOr 302 304 Gr 313 Br 312 G 317 LW 300 Br 2.0 J1 B4 756 755 BW YL Y CN-125 1 2 BATTERY(+) C W J 1 Gr RW BY 2 6 304 302 A8 A8 243 235 234 G1 G1 A5 H1 H1 A2 H2 H4 B1 H3 Y L 880 881 B5 SPOOL POSITION 882 G B8 44 60 CAN L 994 CAN H L 993 Y A1 C1 C4 H6 C8 F7 F9 D6 G8 752 753 Gr R G2 H8 H7 GROUP 2 ELECTRICAL CIRCUIT GROUP 2 ELECTRICAL CIRCUIT HO Y CS-13 RW 215 300 312 313 215 502 309 316 308 238 230 163 240 EARTH1 791 790 163 591 521 545 300 333 332 W 121 290 RW W 142 132 252 544 Y L 700 940 945 G 945 496 B 466 487 488 492 IG POWER RW 914 350 343 GrW LW 410 411 465 464 211 W 204 438 433 263 323A AUTO GREASE IG Or V 660 661 693 WR MCU PR SENSOR POWER Br 680 RW 358 DIFF.

PR SENSOR BOOM DOWN PR BOOM UP PR 736 735 668 BRAKE PRIOLITY BOr 676 672 R BRAKE OI PR 662 GW 948 952 951 950 955 954 957 741 743 746 Y 184 LOW 186 HI 503 RH 504 LH YOr 163 170 Or 215 209A 5 4 10 7 B G13 791 790 792 A2 B3 G4 HAZARD SW 1 2 5 2 9 502 RW 502 RW 290 ROr 235 Gr 234 W 230B L 240 BrR 163 YOr G11 B 230 L 2.0 2.0 MAIN RELAY GND 14 YOr 163 LW 591 Gr 521 Br 300 G 333 RW 332 121 142 132 MIRROR HEAT 9 L 252 544 HORN RY 545 Y 700 940 915 907 908 909 912 914 918 919 923 924 WL 452 215 751 209A ROr Or 170 LOr 447 449 448 451 WR 450 VOr GrW G02 EARTH1 · ELECTRICAL CIRCUIT (1/3) ELECTRICAL CIRCUIT (1/3) 8 7 8 1 4 163 YOr 503 Or 504 GOr 163 CN-156 1 2 G12 CN-11 243 G 3 6 13 4 1 5 GPS FEED BACK 238 V 7 790 L 791 Y 10 11 2 RS-A2 L Y A B C CN-07 1 3 4 5 7 8 13 15 6 2 14 10 LR 12 11 CN-05 15 9 43 18 23 22 37 12 38 51 10 41 14 11 8 39 28 27 45 16 1 6 52 OrW YG ROr L R Gr BOr WR Br R GW Y RW 4 21 7 MAIN PUMP PS P2 49 26 20 19 17 3 5 2 25 VW Br BW 55 L 34 24 33 42 30 54 29 35 36 59 L B Y Y L Y BUCKET POSITION BOOM POSITION 5V 56 YOr LW OrW 46 47 48 40 35 32 31 53 50 57 58 GOr Or R 59 CN-15 GW LW RW Br Or L Y ROr B L Y 7 6 9 1 2 3 4 5 8 10 11 CN-16 YW GR 3 4 13 RW 14 1 L 5 6 8 B 12 RW 11 10 9 7 2 FRONT WIPER E 3 Pf 2 B 1 CS-41 1 2 3 4 5 6 W 308 316 R B 317 LW 309 Y AC OPERATE SIGNAL AC COMP REVERSE FAN SIGNAL MAIN RELAY A CAN A2 RESISTOR B CASSETTE_ILLUMINATION CASSETTE_IG CASSETTE/ROOM LAMP BEACON LAMP WORK LAMP FRONT WORK LAMP FRONT WORK LAMP REAR WORK LAMP REAR EHI PVED POWER EHI SAFETY SOLENOID BACK PRESSURE SOLENOID P/SENSOR SIGNAL SWITCH PARKING ATT LOCK ATT UNLOCK EMERGENCY RY EMERGENCY RY STOP LAMP DIFF.

LOCK RIDE CONTROL AUTO GREASE MAIN PUMP PS P1 ELEC STEER PUMP PR +35 KICK DOWN JOYSTICK STEER F N R M 5 4 Lo Hi G13 SEAT HEATER WITH SWITCH AC IG 24V BATTRY (+) ILLUMINATION CAN 2 LOW CAN 2 HI WIPER 24V WIPER PF WIPER LOW SIGNAL ERROR front PARK OIL PR CN-21 G13 EARTH1 AC HARNESS HARENSS-CABINROOF GND GROUP 2 ELECTRICAL CIRCUIT HA M 7 Lo5 Hi4 B Pf E 1 2 3 CS-41 8 6 5 4 3 2 1 RW G13B LW Y YOr 33 10 68 317 309 163 ZARD SW 1 4 HO Y 2 5 8 1 4 5 2 9 710 CS-13 Or GOr R RW W G13B RW 503 504 5 50 02 2 215 2Gr W 6 RW C 1 BY J L 4 3 BViI G 5 OJ O I II 4BWGC Hi 6W B Lo Hi L Or 1 333 100 342 BG rr 32 L W 333 011 072 BG r 654 CS-12 1 18 82 4 YYOr 78 6 5 4 3 2 1 503 Or 504 GOr 502 RW 502 RW G13B 313 Br 312 G 316 309 502 215 313 302 304 F2 G B 607 11 21 GR RO O 13 NC 1 C B C Y 18 5 CN NN 779 999 015 L 11 46 CAA A N 8 6 19 20 5 7 CAM 17 7 609A R 1 IG 2 3 Gr 650 2 BB AA TT BCN- 66 CC AA MM YR 622 165 6 32157C AUTO GREASE B15 RIDE CONTRO B06 INPUT FRONT A39 INPUT FRONT A40 B05 REAR WIPER ATACH LOCK B08 ATACH UNLOC B19 BEACON RELA B07 MIRROR HEAT B18 FRONT WIPER 1 B17 REAR WIPER S B16 BATTERY REL A20 A04 GND(MAIN) A19 GND(MAIN) ELEC.

STEER M B35 ELEC. STEER P B28 SPARE B21 B31 SPARE B32 NEUTRAL SIGN ANTI-RESTART B11 ELEC. STEERIN B13 CAN(1)-H A23 CAN(1)-L A33 CAN_SHIELD(G A25 BRAKE OIL LO B27 PARKING OIL L B34 BRAKE PRIORI B38 B36 BOOM ROD PR B29 BOOM HEAD P DIFFERTIAL LO B26 A11 AXLE OIL TEMP A28 AXLE OIL TEMP A30 FUEL LEVEL SE B22 HYD TEMP SEN B23 O L A N L E A35 (C 9O SA : AI RT CL EV GROUND_SEN B25 ALT LEVEL B33 COOLING FAN B10 COOLING FAN B20 B01 REVERSE FAN A18 A15 CAN2 LOW A34 CAN2 HI A24 SPARE_ECO F B21 A13 ILLUMINATION A14 DRIVING LIGHT B09 WORK LAMP F B03 WORK LAMP R B14 FUEL WARMER AIRCON RUN S A29 B04 B37 BOOM POSITIO B30 BUCKET POSIT A05 REF.

POWER + POWER IG(+24 A03 BATTERY POW A01 BATTERY POW A02 B02 B12 COUNT_WEIGH A17 AUTO GREASE A37 AUTO GREASE A36 A16 DIFF. LOCK AU DIFF.

LOCK MA A26 HOUR METER_ A10 SPARE_5V+ A07 SPARE_PEDAL B40 A09 B24 SEAT BELT WA SPARE_5V+ A06 SPARE_PEDAL B39 SPARE_PEDAL A08 PROGRAM DU A27 RS-232(1) RX A31 RS-232(1) TX A21 SPARE_RS-232 A12 SPARE A22 SPARE A32 A38 11 12 13 18 16 15 14 8 6 19 20 5 7 17 7 1 3 1 2 3 B 607 B 995 791 Y 790 L B 626 Y 616 R Or GOr 650 Gr 609 V G W R V Br OrW RW 412 413 122 254 306 336 532 412 413 122 254 306 336 532 H9 1 DO-04 2 551A 2 1 DO-03 731 731 B 731 B 660 Or 661 V 538 LW 539 VW 467 V 993 Y 994 L 995 B 672 R 676 VW BOr 668 736 Br 735 BW RW 358 Br 680 662 GW 663 WG 706 LW 711 W 694 WL 693 WR 716 ROr 722 G 723 V R 393 658 W 693 G 153 153 G 181 181 VW 144 144 G 1 181 VW 4 144 4 134 Y 380 0 L Gr W LW OrW YOr Br 235 234 743 746 741 623 235 234 743 746 741 623 G1 G2 630 GW 0 913 GrW 922 VBr 751 L 752 Gr 753 R G GR GrY 635 636 629 630 635 636 629 G5 GR 6 636 9 629 GrY 781 BW W R Br 780 781 782 780 781 782 G6 Y 791 L 790 625 626 616 618 620 624 E9 E8 186 503 504 650 609 F4 F5 660 661 538 539 F7 F 467 993 8 A1 994 995 672 676 668 6 8 6 5 3 8 0 2 4 3 3 8 G 751 913 922 752 753 4 C2 G8 3 G14 B 163 YOr G14 B 7 8 8 9 1 2 1 6 3 4 4 5 3 6 412 413 122 254 306 336 H9 13 38 D8 63 G3 636 G G14 B 635 G 163 YOr B7 238 243 2 23 35 4 G1 629 GrY 630 GW 230 A5 240 163 H1 304 535 D9 EARTH1 791 A2 790 791 790 163 H2 591 591 521 A8 G8 4 L 994 0 7 B OrW 44 89 76 7 OrW 487 2 YG 466 8 ROr 492 1 L 488 0 RW 914 4 GrW 343 1 WR 410 9 8 RGBO rr 4 4 41 6 61 5 4 H6 BOr 411 9 Gr 465 8 R 464 7 W 211 G4 F9 D3 H9 D8 E2 813 9 Gr 752 811 6 76 Y L OWO rWr 7 7 74 4 41 3 G2 6 6 LW 743 G2 7 OrW 746 8 0 5 Y 184 2 R 186 1 Or 503 3 GOr 504 E5 C5 622 536 540 C7 600 570 467 F8 538 539 551A 609B 5 J2 55 31 4 2.0 530 H2 51 96 13 521 609 609A F5 650 G3 J1 630 623 755 755 756 E6 H1 H 102 609A 240 163 163 170 7 A3 E2 215 209A 914 464 170 163 F1 170 335 215 163 502 312 309 308 H9 316 313 300 254 306 412 334 413 H 336 122 333 4 E 545 300 332 121 280 280 154 120 E 5 H6 300 414 209 464 410 411 2.0 211 465 163 J2 462 A2 790 791 A1 A2 L 790 B 792 ROr 915 Y 907 L 908 B3 Or 909 375 377 994 L 791 Y 790 L 781 R 782 Br A2 J2 09B 534 551 G6 E 530 85 85 87 T 86 87 86 3 210 260 L 751 G4 ROr 209A B Or 170 6 2 RW 4 1 LOr 4 790 791 210 ROr G22 B 0 GrW 4 2.0 VOr 4 WR 4 2 755 556 51 3 3 53 7 7 37 1 7 85 BBR r WW CR-40 87a 8787a88 38 65 07 CR-381 87a8 88 37 8 65 0a 7 14 8630 85 15 88 5 6 83 70 R R IG EHCU RY SLO RELAY RW 256 Br 551 BW 755 377 538 3.0 5 33 5 44 1 45 2 2 2 25 5 8 84 2 0 0 5 6 65 3 0 04 8 0 00 55 5G 33 55 03 13 5 55 33 33 76 49 1 55 5 662 7 536 6530 2 005 44 45 3700 1 995 40 40 00 AB 102 533 551 5 6 676 9 0 052 1 0 903 R 11 CR-30 8630 87a 85 8787a88 38 65 07 B RR rY R 12 CR-56 88 5 6 83 70 87a8 88 37 8 65 0a 7 LV RR WW R13 CR-XX 8630 87a 85 87 85 8787a8 36 0 R 16 CR-38 88 5 6 83 70 87a8 88 37 8 65 0a 7 L R RRW OO rr R 17 CR-35 88 5 6 83 70 87a8 88 37 8 65 0a 7 BB RG r R 18 CR-05 88 56 3 80 787a8 88 37 8 65 0a 7 V GG O W r CN-36 TT S SEA RC RR M ML T CU CCA M MOC O/ UA UR C D A MU O N HI S I RN U R2 E T MPB O TT 4 T L BE A + L O OVBK + A T R K( P R+ WE EB E M 2 E I EY + 4 R YP H G R I VS C B GB+ U W ) + L VB B RR RR GG G Grr r RWW R W 3R 3.0 G Br CN-37 T SCRR M L C PAC M U A UU D C I I S RI UO T G E I, G EI 0 GK RG 4 E I Y GOFF L VB Rr W Or IG ECM RY MIRROR SPARE NEUTRAL RY IGNITION RY SAFETY HEAT RY RELAY 21 13 112 1222110 00 000 000000A AA AAA AAAAAA 1 12221 0 00000 A AAAAA 000000000 11 1987654321 10 111111 876543 FUSE & RELAY BOX1- INSIDE Br 551 R 344 RW 280 RW 280 600 ROr 600 ROr 371 GOr 534 GW 630 BW 755 R 344 LR 544 V 609B R 609A 102 3R G 533 3.0 Y 309 Y 309 W 308 B G53 R 316 Br 313 Br 300 Br 300 Br 300 Br 300 Br 300 RW 332 WR 120 WR 120 WB 414 WB 414 WB 414 WB 414 Gr 462 V 467 B G53 C L B Y A 25RG 6 5 4 .85B 85RB D C A N L .

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7-4 · ELECTRICAL CIRCUIT (2/3 ELECTRICAL CIRCUIT (2/3 , machine serial No. HL940A : ~#0210 / HL940A TM : ~#0042) , machine serial No. HL940A : ~#0210 / HL940A TM : ~#0042)

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