MIL Circuit Troubleshooting (2013-15)

Gauge control module check:
- 1. Press the engine start/stop button to select the ON mode.

- 2. Do the gauge self-diagnostic function .

Does the MIL flash?

YES

Go to step 2.

NO

Substitute a known-good gauge control module , then recheck. If the symptom/indication goes away with a known-good gauge control module, replace the original gauge control module .?

PCM check:

- 1. Connect the HDS to the DLC.

- 2. Check the parameter(s) below with the HDS.

Signal	Threshold	Current conditions
Values	Unit	Values	Unit
SCS	Short

Do the current condition(s) match the threshold?

YES

Go to step 3.

Update the PCM if it does not have the latest software, or substitute a known-good 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 .?

- 1. Shorted wire check (SCS line):

Press the engine start/stop button to select the OFF mode.

- 2. Disconnect the following connector.

PCM connector A (49P) - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2013-15), or How to Troubleshoot the A/T System (2013-15)

- 3. Disconnect the HDS.

- 4. Check for continuity between test points 1 and 2.

Test condition	OFF mode
	PCM connector A (49P): disconnected
Test circuit	SCS
Test point 1	PCM connector A (49P) No. 42 (ORN)
Test point 2	Body ground

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

Repair a short in the SCS wire between the PCM (A42), the power control unit, keyless access control unit, keyless access backup control unit, and the DLC.?

The SCS wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good 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 .?