LEMON Manuals: Even more car manuals for everyone
Home >> Honda >> 2003 >> Odyssey EX-L >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control Systems >> Climate Control Power and Ground Circuit Troubleshooting.

Climate Control Power and Ground Circuit Troubleshooting.

  1. Check the No. 3 (7.5A) fuse in the driver's under-dash fuse/relay box, and the No. 13 (7.5A) fuse in the passenger's under-dash fuse/relay box.

    Are the fuses OK? 

    1. YES  -
      • Without Navigation System: Go to step 2.
      • With Navigation System: Go to step  8 .
    2. NO  - Replace the fuse(s) and recheck.
  2. Disconnect climate control unit connector A (8P).
  3. Turn the ignition switch ON (II).
  4. Measure the voltage between the No. 1 terminal of climate control unit connector A (8P) and body ground.
    Fig 1: Measuring Voltage Between No. 1 Terminal Of Climate Control Unit Connector A (8P) & Body Ground
    G01520126Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES  - Go to step 5.
    2. NO  - Repair open in the wire between the No. 3 fuse in the driver's under-dash fuse/relay box and the climate control unit.
  5. Turn the ignition switch OFF.
  6. Measure the voltage between the No. 2 terminal of climate control unit connector A (8P) and body ground.
    Fig 2: Measuring Voltage Between No. 2 Terminal Of Climate Control Unit Connector A (8P) & Body Ground
    G01520127Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES  - Go to step 7.
    2. NO  - Repair open in the wire between the No. 13 fuse in the passenger's under-dash fuse/relay box and the climate control unit.
  7. Check for continuity between the No. 8 terminal of climate control unit connector A (8P) and body ground.
    Fig 3: Checking Continuity Between No. 8 Terminal Of Climate Control Unit Connector A (8P) & Body Ground
    G01520128Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Check for loose wires or poor connections at climate control unit connector A (8P). If the connections are good substitute a known-good climate control unit and recheck. If the symptom/indication goes away replace the original climate control unit.
    2. NO  - Check for an open in the wire between the climate control unit and body ground. If the wire is OK check for poor ground at G401.
  8. Disconnect climate control unit connector B (26P).
  9. Turn the ignition switch ON (II).
  10. Measure the voltage between the No. 13 terminal of climate control unit connector B (26P) and body ground.
    Fig 4: Measuring Voltage Between No. 13 Terminal Of Climate Control Unit Connector B (26P) & Body Ground
    G01520129Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES  - Go to step 11.
    2. NO  - Repair open in the wire between the No. 3 fuse in the driver's under-dash fuse/relay box and the climate control unit.
  11. Turn the ignition switch OFF.
  12. Check for continuity between the No. 15 terminal of climate control unit connector B (26P) and body ground.
    Fig 5: Checking Continuity Between No. 15 Terminal Of Climate Control Unit Connector B (26P) & Body Ground
    G01520130Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Check for loose wires or poor connections at climate control unit connector B (26P) If the connections are good substitute a known-good climate control unit, and recheck If the symptom/indication goes away replace the original climate control unit.
    2. NO  - Check for an open in the wire between the climate control unit and body ground If the wire is OK check for poor ground at G401.
scientia non olet · About LEMON Manuals