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DTC P1447 (77): Battery Module Deviation Honda Civic VII рестайлинг

Mechanical 11 illustrations ~673 words

Replace the battery module (see Battery Module Replacement ).

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Scheme 899: DTC P1448 (63): IPU Module Fan Problem
Scheme 899: DTC P1448 (63): IPU Module Fan Problem

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  1. Reset the MCM (see «How to Reset the MCM»(ref-176542-S15252700542005050600000) ).
  2. Turn the ignition switch ON (II). Is DTC P1634 indicated? YES - Perform the troubleshooting procedure for DTC P1634 (see «DTC P1634 (47)»(ref-176542-S14302025462005052600000) ). NO - Go to step 3.
  3. Reset the MCM (see «How to Reset the MCM»(ref-176542-S15252700542005050600000) ).
  4. Start the engine, and hold the engine at 3,000-4,000 rpm for 2 minute. Is DTC P1448 indicated? YES - Go to step 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the IPU module fan and at the MCM.
  5. Turn the ignition switch OFF.
  6. Turn the battery module switch OFF (see «Turning off power to the high voltage circuit»(ref-176542-S16824220792005050600000) ).
  7. Remove the IPU lid (see «IPU Lid Removal/Installation»(ref-176542-S28390479342005050600000) ).
  8. Disconnect the MCM connector A (31P).
  9. Disconnect the IPU module fan 4P connector.
  10. Check for continuity between body ground and MCM connector terminal A12. Is there continuity? YES - Repair short in the wire the IPU module fan and the MCM (A12). NO - Go to step 11.
  11. Connect IPU module fan 4P connector terminal No. 3 to body ground with a jumper wire.
  12. Check for continuity between body ground and MCM connector terminal A12. Is there continuity? YES - Go to step 13. NO - Repair open in the wire the IPU module fan and the MCM (A12).
  13. Check for continuity between body ground and MCM connector terminal A15. Is there continuity? YES - Repair short in the wire the IPU module fan and the MCM (A15). NO - Go to step 14.
  14. Connect IPU module fan 4P connector terminal No. 2 to body ground with a jumper wire.
  15. Check for continuity between body ground and MCM connector terminal A15. Is there continuity? YES - Go to step 16. NO - Repair open in the wire the IPU module fan and the MCM (A15).
  16. Check for continuity between body ground and IPU module fan 4P connector terminal No. 4. Is there continuity? YES - Go to step 17. NO - Repair open in the wire the IPU module fan and G601.
  17. Reconnect the MCM connector A (31P).
  18. Turn the ignition switch ON (II).
  19. Measure voltage between body ground and IPU module fan 4P connector terminal No. 1. Is there battery voltage? YES - Go to step 20. NO - Repair open in the wire the IPU module fan and the ignition hold relay 2.
  20. Turn the ignition switch OFF.
  21. Reconnect the IPU module fan 4P connector.
  22. Start the engine, and hold the engine at 3,500-4,000 rpm for 1 minute. Does the IPU module fan run? YES - Go to step 23. NO - Go to step 27 .
  23. Turn the ignition switch OFF.
  24. Connect IPU module fan 4P connector terminal No. 2 to body ground with a jumper wire.
  25. Turn the ignition switch ON (II).
  26. Measure voltage between body ground and MCM connector terminal A15. Is there more than 2 V? YES - Update the MCM if it does not have the latest software, or substitute a known-good MCM, then recheck (see «MCM Updating for Testing»(ref-176542-S30822724192005050600000) ). If the symptom/indication goes away with a known-good MCM, replace the original MCM. NO - Replace the IPU module fan (see «IPU Module Fan Replacement»(ref-176542-S32772970432005050600000) ).
  27. Turn the ignition switch OFF.
  28. Disconnect the IPU module fan 4P connector.
  29. Start the engine, and hold the engine at 3,500-4,000 rpm for 1 minute.
  30. Measure voltage between body ground and MCM connector terminal A12. Is there more than 2 V? YES - Replace the IPU module fan (see «IPU Module Fan Replacement»(ref-176542-S32772970432005050600000) ). NO - Update the MCM if it does not have the latest software, or substitute a known-good MCM, then recheck (see «MCM Updating for Testing»(ref-176542-S30822724192005050600000) ). If the symptom/indication goes away with a known-good MCM, replace the original MCM.

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