Model(s) Year Eng. Code Trans. Code VIN Range From VIN Range To 00 - Condition 270711 October 2,0716076, 07 due to clarification Supersedes Group 27 number 07- dated September 18, Battery, Discharged, Diagnosis for Excessive Static Current Draw Technical Background One or more of the following symptoms is possible. Discharged battery Engine does not start because of low battery voltage Voltage display in the combination instrument displays too low "Low battery" fault codes in various control modules. Production Solution Battery! Current draw procedure introduced in VAS 01A1B scan tool with the release of software version 11.78.00. Service I ihip: Refer to ElsaWeb for other s that apply to specific vehicles with discharged batteries. These s provide information about intermittent faults and correct battery testing!charging procedures. (-" Jj Note: Perform ALL STEPS, to systematically test for faults and to avoid repeat repairs. /11"'\ \.!) Note: The power supply to vehicle must not be cut off. DO NOT perform terminal reset. DO NOT remove or disconnect battery, battery cables or fuses. Page 1 of 4 plus attachment C 07 Volkswagen of America, Inc. rights. rv.d. Information contained In thl. document 1. bal.d on the late Information avallabl. at the time of printing and I. lubled to the copyright and oth.r Int.llectual property Figh of Volkswagen of Am.rica, Inc., lh affiliated companl and it. lieenlon. rights are rel.rved '0 make chang at any tim. without notlc. No port of thl. document may b. reproduced, dored In a retrieval syd.~ or transmitted 1" any form or by any mean., electronic, mechanical, photocopying, recording, or otherwl.e, nor may the mat.rial. b. modifi.d or r.po ed to other.h, without the prior.xp. d written p.rml ion of the pubu.h.r.
Check the fault memory. Compare control units on the fault memory print-out with vehicle equipment (PR numbers). Are all necessary control units listed on the print-out? Any control units not listed may be faulty and could be indications for the further fault finding. Check which non-genuine parts are installed, e.g. tow bar, animal protection, radio, DVD, etc. If an increased closed-circuit current is found, check these components first. Step 1: Verify Battery Condition 1. Connect Midtronics INC-940 to battery 2. Check and/or charge battery based on applicable 3. If INC-940 test fails battery, replace battery before continuing Step 2: Verify Sleep State Current 1. Connect 0 amp current clamp to VAS 01 AlB 2. Calibrate the current clamp 3. Connect current clamp to negative battery cable with arrow pointing away from battery. Current flows out of the battery to the chassis of the vehicle 4. Close all doors, trunk, or hood latch so vehicle control units detect all doors closed. Arm vehicle anti-theft system with remote I i hip: If vehicle has easy entry handles then it is necessary to keep clear of all handles to avoid bus communication/wakeup message. On vehicles equipped with air suspension, after engine is turned off. the system will stay in standby for up to five minutes 6. Observe sleep state current draw after vehicle is left untouched for TWO HOURS. Vehicle: Phaeton other models Nominal sleep current: 0mA 40 ma Page 2 of 4 plus attachment Cl 07 Volkswagen of America, Inc. rights re rv.d. Information contained In thl. document 11 based on the lat.st Information available at the tim. of printing and I. subied to the copyright and oth.r Int.lI.dual property rights of Volkswagen of America, Inc., it. affiliated componl and h. Iiunlorl. rights are relerv.d.o male. chang of any tim. without notic. No part of thl. document may b. r.produced, stor.d in a retrieval svlt.m, or tran.mi"ed in any form or by any meana,.iectronic, mechanical, photocopying, recording, or otherwi, nor may th mat.rial. b. modifi.d or tepo.ted to oth.r.it, without the prior.xpr d writt.n p.rmi lon of the publi.h.r.
7. If after two hours the vehicle exceeds maximum sleep state current draw, proceed to Step 3: Consuming Circuit Isolation. If vehicle does not exceed maximum sleep state current draw, perform a long term (overnight) measurement test. Record the long term measurement using MINIMAX setting of scan tool. Excessive current = Measured current> nominal sleep current Periodic spikes in current draw are normal Step 3: Consuming Circuit Isolation Due to the state of the CAN Bus communications in the vehicle, it is no longer acceptable to pull each individual fuse one at a time to try and identify which circuit is consuming current. Removal! reinsertion of a fuse while vehicle is in a sleep state may wake the bus of the vehicle. and invalidate the test. Identifying "consuming" circuits must be done by measuring a voltage drop across fuse and aligning with the value in matrix located at end of this document. Starting at interior fuse boxes, perform the following tasks: Use VAS 01A1B multimeter function. Fluke 83 multimeter, or equivalent. Use "mv" scale on meter Measure voltage drop across fuse by placing the positive lead on one side of the fuse and negative lead on other side. Take absolute value of reading of voltage drop (ignore negative signs) and then reference voltage drop chart to determine how much current the circuit is currently consuming. See Identifying Current Consumption with Matrix attachment. Check all fuses until fuse with approximate excessive current draw is identified IT/TiP: Excessive current = Measured current> nominal sleep current Page 3 of 4 plus attachment C 07 Volkswagen of America, Inc. rights r rv.d. Information contained In,hi. document I. bal.d on the latett Information available at the tim. of printing and I. lubled 1o the copyright and oth.r Inl.lI.dual property ri"hh of Volluwagen of America, Inc., Its ahiliat.d companl and Itllle.nlon. right. are re Ned to make chang at any tim. without "otic. No pari of.hi. document may b. reproduced, dored In a re'rievol system, or tran.mitted In any form or by any meana, electronic, nmchanical, photocopying, recording, or otherwi, nor may th mat.rlal. b. modifi.d or reposted to other.it, without the prior.xpre eci written perml lon of the publl.h.r.
Identification of component: 1. Once fused circuit is identified, use service repair and wiring diagram information in ElsaWeb to identify all components on circuit 2. Disconnect components from the circuit one by one and allow sleep current to stabilize after each elimination. 3. Measure vehicle current consumption and voltage drop across fuse once again. If within normal range, as specified in the table (see Current Consumption Matrix attachment), the component with excessive consumption is identified. 4. Repeat steps above until component is identified causing excessive current draw. Warranty Information only. Required Parts and Tools No Special Parts required. No Special Tools required. Additional Information part and service references provided in this are subject to change and/or removal. Always check with your Parts Dept. and Repair Manuals for the latest information. Page 4 of 4 plus attachment C 07 Volkswagen of America, Inc. tights rel.rv.d. Information contained In,hi. document I. bal.d on the latest Information avallabl. at the tim. of printing and I ubled to the copyright and oth.r Int.lI.ctual property right. of Volkswagen of Am.rica, Inc., h. ahiliated compani and It. IIcenlors. rights are rel.rved make chang at any tim. without notlc. No port of this document may b. reproduced, stored In a retrieval ~.m, or transmitted In any form or by any mean" electronic, mechanical, photocopying. recording. or otherwi, nor may,h mat.rlal. b. modifi.d or repotled to o.h.r.1, without the prior.xpr d wrltt.n p.nnl lon of the publl.h.r.
Identifying Current Consumption with Matrix What is needed: o Measured voltage drop across fuse in illv o Fuse type o Fuse rating Measuremen Minr ~tandard mv 7. '-./ 1 2 0.1 6 14 7 13 23 47 62 0.2 12 28 13 27 4 61 94 123 ~O.V 18 43 ) 40 68 91 141 18 0.4 24 40 7 -zo 4 91 122 188 246 0. 0 71 33 67 113 12 23 8 r Measured voltage drop across fuse Example: Measured voltage drop =.3 mv Fuse type = Fuse rating = A ~ Fuse type ~ Fuse rating ~ ma Current consumption through circuit = lila Page 1 of3
Current Consumption Measurement mv 0.1 0.2 0.3 0.4 0. 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1. 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2. 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3. 3.6 3.7 3.8 3.9 4 4.1 4.2 4.3 4.4 4. 4.6 4.7 4.8 4.9 Matrix 6 12 18 24 36 42 48 4 60 66 72 78 84 90 96 2 8 114 1 126 132 138 144 10 16 162 168 174 180 186 192 198 4 2 216 222 228 234 240 246 22 28 264 270 276 282 288 294 7. 40 0 60 70 80 90 0 1 1 1 140 10 160 169 179 189 199 9 219 229 239 249 29 269 279 289 299 9 319 329 339 349 39 369 379 389 399 409 419 429 439 449 49 479 488 14 28 43 7 71 8 99 114 128 142 16 171 18 199 213 227 242 26 270 284 298 313 327 341 3 369 384 398 412 426 441 4 483 497 12 26 40 4 68 83 97 611 62 639 64 668 682 696 7 13 26 33 40 46 3 9 66 73 79 86 92 99 6 112 119 12 132 139 14 12 18 16 172 178 18 192 198 211 218 22 231 238 244 21 28 264 271 277 284 291 297 4 3 317 324 13 27 40 4 67 80 94 7 1 134 147 161 174 187 1 214 228 241 24 268 281 294 8 321 33 348 361 37 388 401 41 428 442 4 468 482 49 09 22 3 49 62 7 89 602 616 629 642 66 1 23 4 68 91 113 136 18 181 4 226 249 272 294 317 340 362 38 407 4 43 47 498 21 43 66 89 611 634 66 679 702 724 747 770 792 81 837 860 883 90 928 91 973 996 19 41 64 86 19 61 91 122 12 183 213 244 274 33 366 396 427 47 487 18 48 79 609 640 670 701 731 762 792 823 83 884 914 944 97 0 36 66 97 1127 118 1188 1219 1249 1280 13 1341 1371 1401 1432 1462 1493 2 47 94 141 188 23 281 328 37 422 16 63 6 67 704 71 797 844 891 938 98 32 79 1126 1173 12 1267 1313 1360 1407 144 101 148 19 1642 1689 1736 1782 1829 1876 1923 1970 17 64 2111 218 2 222 2298 62 123 18 246 8 370 431 493 4 616 677 739 801 862 924 98 47 19 1170 1232 1293 13 1417 1478 140 1601 1663 172 1786 1848 1909 1971 32 94 216 2217 2279 2340 2402 2464 22 287 2648 27 2772 2833 289 296 18 Page 2 of3
Measurement mv.1.2,3,4,,6,7,8,9 6 6.1 6.2 6.3 6.4 6. 6.6 6.7 6.8 6.9 7 7.1 7.2 7.3 7.4 7. 7.6 7.7 7.8 7.9 8 8.1 8.2 8.3 8.4 8. 8.6 8.7 8.8 8.9 9 9.1 9.2 9.3 9.4 9. 9.6 9.7 9.8 9.9. 0 6 312 318 324 3 336 342 348 34 360 366 372 378 384 390 396 402 408 414 4 426 432 438 444 40 46 462 468 474 480 486 492 498 04 16 22 28 34 40 46 2 8 64 70 76 82 88 94 600 7. 498 08 18 28 38 48 8 68 78 88 98 608 618 628 638 648 68 668 678 688 698 708 718 728 738 748 78 768 778 788 798 807 817 827 837 847 87 867 877 887 897 907 917 927 937 947 97 967 977 987 997 711 72 739 73 767 782 796 8 824 838 83 867 881 89 909 924 938 92 966 981 99 09 23 37 2 66 80 94 18 1123 1137 111 116 1179 1194 18 1222 1236 121 126 1279 1293 17 1322 1336 130 1364 1378 1393 1407 1421 3 337 343 30 37 363 370 376 383 390 396 403 409 416 423 429 436 442 449 46 462 47 482 489 49 02 08 1 22 28 3 41 48 61 68 7 81 88 94 601 608 614 621 627 634 641 647 64 660 669 683 696 709 723 736 749 763 776 790 803 816 8 843 87 870 883 897 9 923 937 90 964 977 990 04 17 44 7 71 84 97 1111 1124 1138 111 1164 1178 1191 14 1218 1231 124 128 1271 128 1298 1312 132 1338 Page 3 of3 1 1132 114 1177 10 1222 124 1268 1290 1313 133 138 1381 1403 1426 1449 1471 1494 117 139 162 184 1607 16 162 167 1698 17 1743 1766 1788 1811 1833 186 1879 1901 1924 1947 1969 1992 1 37 60 82 2 2128 210 2173 2196 2218 2241 2263 123 14 184 161 164 1676 1706 1737 1767 1798 1828 188 1889 1919 190 1980 11 41 72 22 2133 2163 2194 2224 22 228 231 2346 2376 2407 2437 2468 2498 229 29 290 26 261 2681 2712 2742 2772 2803 2833 2864 2894 292 29 2986 16 47 2 234 2392 2439 2486 233 280 2627 2674 2721 2768 2814 2861 2908 29 02 49 96 3143 3190 3237 3284 33 3377 3424 3471 318 36 3612 369 3706 373 3800 3846 3893 3940 3987 4034 4081 4128 417 4222 4269 4316 4362 4409 446 403 40 497 4644 1 80 3141 33 3264 3326 3387 3449 311 372 3634 369 377 3819 3880 3942 4003 406 4127 4188 4 4311 4373 4434 4496 48 4619 4681 4742 4804 4866 4927 4989 00 112 174 23 297 38 4 482 43 60 666 728 789 81 913 974 6036 6097 619