MIL Circuit Troubleshooting

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

Turn the ignition switch to ON (II).
Do the gauge self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ).
Does the MIL flash?

YES -Go to step 3.

NO -Substitute a known-good gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ), then recheck. If the symptom/indication goes away with a known-good gauge control module, replace the original gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
Connect the HDS to the DLC (see GENERAL TROUBLESHOOTING INFORMATION ).
Check the SCS in the DATA LIST with the HDS.
Is a short indicated?

YES -Go to step 5.

NO -Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM (see PCM REPLACEMENT ).
Turn the ignition switch to LOCK (0).
Disconnect PCM connector A (49P), then disconnect the HDS.
Check for continuity between PCM connector terminal A32 and body ground.

Fig 1: Checking Continuity Between PCM Connector Terminal A32 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short in the wire between the PCM (A32) and the DLC.

NO -Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM (see PCM REPLACEMENT ).