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TCS Indicator Circuit Troubleshooting

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Honda Odyssey, 2003 Honda Odyssey, 2002 Honda Odyssey, 2001 Honda Odyssey, and 2000 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn the ignition switch ON (II), and watch the TCS indicator.

    Does the TCS indicator come on? 

    1. YES  - If the TCS indicator comes on and goes off, it's OK. If the TCS indicator stays on, go to step  7 .
    2. NO  - Go to step 2.
  2. Turn the ignition switch OFF, then ON (II) again.

    Does the brake system indicator come on ? 

    1. YES  - Go to step 3.
    2. NO  - Repair open in the brake system indicator circuit.
    • Blown BACKUP LIGHT (7.5A) fuse.
    • Open in the wire between the BACKUP LIGHT (7.5A) fuse and the gauge assembly.
    • Open circuit inside the fuse box.
  3. Check the TCS indicator bulb in the gauge assembly.

    Is the bulb OK ? 

    1. YES  - Go to step 4.
    2. NO  - Replace the TCS indicator bulb.
  4. Connect the gauge assembly connector B (22P) terminal No. 13 and body ground with a jumper wire.
    Fig 1: Connecting Gauge Assembly Connector B (22P) Terminal No. 13 & Body Ground
    G01519891Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Does the TCS indicator come on ? 

    1. YES  - Go to step 5.
    2. NO  - Replace the printed circuit board in the gauge assembly.
  5. Remove the jumper wire at the gauge assembly, and connect the ABS/TCS control unit connector B (16P) terminal No. 16 and body ground with a jumper wire.
    Fig 2: Connecting ABS/TCS Control Unit Connector B (16P) Terminal No. 16 & Body Ground
    G01519892Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Does the TCS indicator come on ? 

    1. YES  - Go to step 6.
    2. NO  - Repair open in the wire between the gauge assembly and the ABS/TCS control unit.
  6. Connect the ABS/TCS control unit connector C (12P) terminal No. 2 and body ground with a jumper wire.
    Fig 3: Connecting ABS/TCS Control Unit Connector C (12P) Terminal No. 2 & Body Ground
    G01519893Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Does the TCS indicator come on ? 

    1. YES  - Repair open in the wire between the ABS/TCS control unit and body ground (G101).
    2. NO  - Check for loose ABS/TCS control unit connectors. If necessary, substitute a known-good ABS/TCS control unit, and recheck.
  7. Check the R/C MIRROR (7.5A) fuse in the driver's under-dash fuse/relay box, and reinstall the fuse if it is OK.

    Is the fuse OK ? 

    1. YES  - Go to step 8.
    2. NO  - Replace the fuse, and recheck.
  8. Measure the voltage between the ABS/TCS control unit connector A (26P) terminal No. 13 and body ground.
    Fig 4: Measuring Voltage Between ABS/TCS Control Unit Connector A (26P) Terminal No. 13 & Body Ground
    G01519894Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES  - Go to step 9.
    2. NO  - Repair open in the wire between the driver's under-dash fuse/relay box and the ABS/TCS control unit.
  9. Turn the ignition switch OFF.
  10. Disconnect the ABS/TCS control unit connector A (26P) and connector B (16P).
  11. Turn the ignition switch ON(II).

    Does the TCS indicator go off ? 

    1. YES  - Repair short to body ground in the wire between the gauge assembly and the ABS/TCS control unit.
    2. NO  - Check for loose ABS/TCS control unit connectors. If necessary, substitute a known-good ABS/TCS control unit, and recheck.
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