Honda Fit/Jazz - MIL Circuit Troubleshooting (L12A/L13A without ETCS)
MIL Circuit Troubleshooting
| 1. | Connect the HDS or the scan tool. |
| 2. | Turn the ignition switch ON (II) and read the scan tool/Honda PGM Tester. Does the HDS or the scan tool communicate with the ECM/PCM? YES - Go to then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n NO - Check for an open in the wires between the ECM/PCM (E31) and the gauge assembly. Also check for a blown MIL bulb. If the wires and the bulb are OK, replace the gauge assembly.n |
| 21. | Turn the ignition switch OFF. |
| 22. | Inspect the No. 20 (15A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES - Go to then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM. |
| 28. | Disconnected the connectors of all following items.
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| 29. | Check for continuity between PGM-FI main relay 1 4P connector terminals No. 1 and body ground. then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n |
| 34. | Remove the driver's side under cover. |
| 35. | Remove the relay holder (A) from the under-dash fuse/relay box, and remove the PGM-FI main relay 2, (blue) (B) from the relay holder (A), after reinstall the relay holder (A) to the under-dash fuse/relay box. then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n NO - Repair open in the wire between PGM-FI main relay 1 and the ECM/PCM (E7).n |
| 50. | Reconnect ECM/PCM connector E (31P). |
| 51. | Turn the ignition switch ON (II). |
| 52. | Measure voltage between body ground and ECM/PCM connector terminals A2 and A3 individually. then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n |
| 68. | Measure voltage between body ground and ECM/PCM connector terminals A20. then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n NO - Go to then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n |
| 75. | Turn the ignition switch OFF. |
| 76. | Turn the ignition switch ON (II). |
| 77. | Measure voltage between ECM/PCM connector terminal E29 and body ground. then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n |
| 81. | Turn the ignition switch OFF. |
| 82. | Disconnect the ECM/PCM connector E (31P). |
| 83. | Turn the ignition ON (II). Is the MIL ON? YES - Repair short in the wire between the gauge assembly and the ECM/PCM (E31). If the wires are OK, replace the gauge assembly.n NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n |
