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Variable Cylinder Management (Vcm) System: Diagnosis Honda Odyssey I

Testing & Diagnostics 7 illustrations ~1114 words

DTC

DTCDescription
DTC P0522EOP Sensor Circuit Low Voltage
DTC P0523EOP Sensor Circuit High Voltage
DTC P2646VTEC System Stuck OFF
DTC P2647VTEC System Stuck ON
DTC P2648Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Low Voltage
DTC 2649Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit High Voltage

DTC INDEX

Scheme 249

Scheme 249: DTC P0522: EOP Sensor Circuit Low Voltage
Scheme 249: DTC P0522: EOP Sensor Circuit Low Voltage

Scheme 250

Scheme 250
Scheme 250

Scheme 251

Scheme 251
Scheme 251
  1. Turn the ignition switch ON (II).
  2. Check the OIL PRESSURE SENSOR in the DATA LIST with the HDS. Is there about 0.18 V or less? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the oil pressure sensor and the PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect the EOP sensor 3P connector.
  5. Turn the ignition switch ON (II).
  6. Check the OIL PRESSURE SENSOR in the DATA LIST with the HDS. Is there about 0.18 V or less? YES - Go to step 8 . NO - Go to step 7.
  7. Measure voltage between EOP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Go to step 16 . NO - Go to step 12 .
  8. Turn the ignition switch OFF.
  9. Jump the SCS line with the HDS.
  10. Disconnect PCM connector C (44P).
  11. Check for continuity between EOP sensor 3P connector terminal No. 2 and body ground. Is there continuity? YES - Repair short in the wire between the PCM (C22) and the EOP sensor, then go to step 18 . NO - Go to step 24 .
  12. Turn the ignition switch OFF.
  13. Jump the SCS line with the HDS.
  14. Disconnect PCM connector C (44P).
  15. Check for continuity between PCM connector terminal C13 and EOP sensor 3P connector terminal No. 1. Is there continuity? YES - Go to step 24 . NO - Repair open in the wire between the PCM (C13) and the EOP sensor, then go to step 18 .
  16. Turn the ignition switch OFF.
  17. Replace the EOP sensor (see «EOP SENSOR REMOVAL/INSTALLATION»(ref-220949-S07658679082006022100000) ).
  18. Reconnect all connectors.
  19. Turn the ignition switch ON (II).
  20. Reset the PCM with the HDS.
  21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  22. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0522 is indicated, check for poor connections or loose terminals at the EOP sensor and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to step 23.
  23. Monitor the OBD STATUS for DTC P0522 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check for poor connections or loose terminals at the EOP sensor and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 21 and recheck.
  24. Update the PCM if it does not have the latest software, or substitute a known-good PCM (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220945-S16531944742006022100000) ).
  25. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0522 is indicated, check for poor connections or loose terminals at the EOP sensor and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-220946-S32339521312006022100000) ).

Scheme 252

Scheme 252: DTC P0523: EOP Sensor Circuit High Voltage
Scheme 252: DTC P0523: EOP Sensor Circuit High Voltage

Scheme 253

Scheme 253
Scheme 253

Scheme 254

Scheme 254
Scheme 254

Scheme 255

Scheme 255
Scheme 255
  1. Turn the ignition switch ON (II).
  2. Check the OIL PRESSURE SENSOR in the DATA LIST with the HDS. Is there about 4.79 V or more? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the oil pressure sensor and the PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect the EOP sensor 3P connector.
  5. Connect EOP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
  6. Turn the ignition switch ON (II).
  7. Check the OIL PRESSURE SENSOR in the DATA LIST with the HDS. Is there about 4.79 V or more? YES - Go to step 8. NO - Go to step 18 .
  8. Remove the jumper wire.
  9. Measure voltage between EOP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Go to step 14. NO - Go to step 10.
  10. Turn the ignition switch OFF.
  11. Jump the SCS line with the HDS.
  12. Disconnect PCM connector C (44P).
  13. Check for continuity between PCM connector terminal C14 and EOP sensor 3P connector terminal No. 3. Is there continuity? YES - Go to step 26 . NO - Repair open in the wire between the PCM (C14) and the EOP sensor, then go to step 20 .
  14. Turn the ignition switch OFF.
  15. Jump the SCS line with the HDS.
  16. Disconnect PCM connector C (44P).
  17. Check for continuity between PCM connector terminal C22 and EOP sensor 3P connector terminal No. 2. Is there continuity? YES - Go to step 14 . NO - Repair open in the wire between the PCM (C22) and the EOP sensor, then go to step 20 .
  18. Turn the ignition switch OFF.
  19. Replace the EOP sensor (see «EOP SENSOR REMOVAL/INSTALLATION»(ref-220949-S07658679082006022100000) ).
  20. Reconnect all connectors.
  21. Turn the ignition switch ON (II).
  22. Reset the PCM with the HDS.
  23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  24. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0523 is indicated, check for poor connections or loose terminals at the EOP sensor and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to step 25.
  25. Monitor the OBD STATUS for DTC P0523 in the DTCs MENU with the HDS. Does the screen indicated PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check for poor connections or loose terminals at the EOP sensor and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 23 and recheck.
  26. Update the PCM if it does not have the latest software, or substitute a known-good PCM (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220945-S16531944742006022100000) ).
  27. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0523 is indicated, check for poor connections or loose terminals at the EOP sensor and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-220946-S32339521312006022100000) ).

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