Keyless Access System Symptom Troubleshooting The key-in reminder sounds in vehicle OFF mode (2014 - 2015)

NOTE:  Refer to the Electrical Wiring Diagrams for the location of the under-dash fuse/relay box connector.

1. PCU DTC check:

   - 1. Check the PCU DTCs with the HDS.

   Are there any DTCs?

   YES 

   Troubleshoot the PCU DTCs.

   NO 

   Go to step2.

2. Shorted wire check (KEY_SW line):

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

   - 2. Disconnect the following connectors.

   Keyless access control unit connector C (24P)

   Under-dash fuse/relay box connector P (20P)

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

   Test condition	OFF mode Keyless access control unit connector C (24P): disconnected Under-dash fuse/relay box connector P (20P): disconnected
   Test circuit	KEY_SW
   Test point 1	Keyless access control unit connector C (24P) No. 6 (BRN)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short to ground in the wire.

   NO 

   The KEY_SW wire is not shorted. Go to step 3.

3. Open wire check (KEY_SW line):

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

   Test condition	OFF mode Keyless access control unit connector C (24P): disconnected Under-dash fuse/relay box connector P (20P): disconnected
   Test circuit	KEY_SW
   Test point 1	Under-dash fuse/relay box connector P (20P) No. 11 (BRN)
   Test point 2	Keyless access control unit connector C (24P) No. 6 (BRN)

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

   Is there continuity?

   YES 

   The KEY_SW wire is OK. Go to step 4.

   NO 

   Repair an open or high resistance in the wire.

4. Determine possible failure area (MICU, others):

   - 1. Reconnect under-dash fuse/relay box connector P (20P).

   - 2. Measure the voltage between test points 1 and 2.

   Test condition	OFF mode Keyless access control unit connector C (24P): disconnected
   Test circuit	KEY_SW
   Test point 1	Under-dash fuse/relay box connector P (20P) No. 11 (BRN)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Go to step5.

   NO 

   Faulty MICU; replace the under-dash fuse/relay box - Refer to: Under-Dash Fuse/Relay Box Removal and Installation (KA models with Keyless Access System), or Under-Dash Fuse/Relay Box Removal and Installation (KA KX models without Keyless Access System) .

5. Keyless access control unit KEY_SW line check:

   - 1. Reconnect keyless access control unit connector C (24P)

   - 2. Press the engine start/stop button to select the ON mode.

   - 3. Select KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS, and enter FUNCTIONAL TESTS.

   - 4. Connect the voltmeter to test points 1 and 2.

   Test point 1	Keyless access control unit connector C (24P) No. 6 (BRN)
   Test point 2	Body ground

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

   - 5. Select DRLOCKSWOUT with the HDS.

   Does the voltage change from about 12 to 0 V?

   YES 

   Go to step6.

   NO 

   Replace the keyless access control unit .

6. Keyless access control unit SS1 (+) line check:

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

   - 2. Disconnect the following connector.

   Keyless access control unit connector B (28P)

   - 3. Measure the voltage between test points 1 and 2.

   Test condition	OFF mode Keyless access control unit connector B (28P): disconnected
   Test circuit	SS1 (+)
   Test point 1	Keyless access control unit connector B (28P) No. 12 (GRN)
   Test point 2	Body ground

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

   Is there about 0 V?

   YES 

   Reconnect the connectors and recheck the system. If the symptom does not go away, replace the keyless access control unit .

   NO 

   Go to step7.

7. Engine start/stop switch check:

   - 1. Disconnect the following connector.

   Engine start/stop switch 10P connector

   - 2. Do the engine start/stop switch test .

   Is the engine start/stop switch OK?

   YES 

   Repair a short to power in the wire.

   NO 

   Replace the engine start/stop switch .