EPS Indicator Does Not Go Off, And No DTCs Are Stored (With Auto Idle Stop System, Without ACC) (2015-17)

1. Problem verification

   - 1. Start the engine.

   - 2. Check the EPS indicator.

   Does the EPS indicator come on, then go off?

   YES 

   Intermittent failure, the system is OK at this time.

   NO 

   Go to step 2.

2. DTC check

   - 1. Test-drive the vehicle at 6 mph (10 km/h) or more.

   - 2. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Are there DTCs indicated?

   YES 

   Go to indicated DTC's troubleshooting.

   NO 

   Go to step 3.

3. DTC check (PGM-FI system)

   - 1. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0A94 VOLTAGE STABILIZER MALFUNCTION

   Is DTC P0A94 indicated?

   YES 

   Go to indicated DTC's troubleshooting.

   NO 

   Go to step 4.

4. Gauge control module operation check

   - 1. Do the gauge control module self-diagnostic function.

   Does the EPS indicator blinkΩ

   YES 

   Go to step 5.

   NO 

   Replace the gauge control module .

5. Body electrical system DTC check

   - 1. Check for DTCs in the gauge control module with the HDS.

   DTC Description	DTC

   Is DTC indicated?

   YES 

   Go to indicated DTC's troubleshooting.

   NO 

   Go to step 6.

6. Fuse check 1

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Check the following fuse.

   Fuse	No. A1-1 (70 A)
   Location	Under-hood fuse/relay box

   Is the fuse OK?

   YES 

   The fuse is OK. Reinstall the fuse, then go to step 7.

   NO 

   Replace the fuse. If the fuse blows again, repair a short to ground on the No. A1-1 (70 A) fuse circuit.

7. Fuse check 2

   - 1. Check the following fuse.

   Fuse	No. B13 (15 A)
   Location	Under-dash fuse/relay box

   Is the fuse OK?

   YES 

   The fuse is OK. Reinstall the fuse, then go to step 8.

   NO 

   Replace the fuse. Turn the vehicle to the ON mode, then to the OFF (LOCK) mode. If the fuse blows again, repair a short to ground on the No. B13 (15 A) fuse circuit.

8. Fuse check 3

   - 1. Check the following fuse.

   Fuse	No. GA (7. 5 A)
   Location	Under-dash sub fuse/relay box B

   Is the fuse OK?

   YES 

   The fuse is OK. Reinstall the fuse, then go to step 9.

   NO 

   Replace the fuse. Turn the vehicle to the ON mode, then to the OFF (LOCK) mode. If the fuse blows again, repair a short to ground in the No. GA (7. 5A) fuse circuit.

9. DC-DC converter IG1 relay check

   - 1. Remove the DC-DC converter IG1 relay from the under-dash sub fuse/relay box B, and test it.

   Is the relay OK?

   YES 

   The relay is OK. Reinstall the relay, then go to step 10.

   NO 

   Replace the DC-DC converter IG1 relay.

10. Open wire check (IG1 VSA (DC) line) 1

    - 1. Disconnect the following connector.

    EPS control unit connector A (11P)

    - 2. Turn the vehicle to the ON mode.

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

    Test condition	Vehicle ON mode
    	EPS control unit connector A (11P): disconnected
    Test point 1	EPS control unit connector A (11P) No. 9 - Refer to: EPS Control Unit Connector for Inputs and Outputs (With Auto Idle Stop System) (2015-17),  or EPS Control Unit Connector for Inputs and Outputs (Without Auto Idle Stop System) (2015-17)
    Test point 2	Body ground

    Is there battery voltage?

    YES 

    The IG1 VSA (DC) wire is OK. Go to step  15.

    NO 

    Go to step 11.

11. Open wire check (IG1 VSA (DC) line) 2

    - 1. Turn the vehicle to the OFF (LOCK) mode.

    - 2. Remove the DC-DC converter IG1 relay from the under-dash sub fuse/relay box B.

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector A (11P): disconnected
    	DC-DC converter IG1 relay: removed
    Test point 1	EPS control unit connector A (11P) No. 9 - Refer to: EPS Control Unit Connector for Inputs and Outputs (With Auto Idle Stop System) (2015-17),  or EPS Control Unit Connector for Inputs and Outputs (Without Auto Idle Stop System) (2015-17)
    Test point 2	DC-DC converter IG1 relay 4P socket No. 1

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

    Is there continuity?

    YES 

    The IG1 VSA (DC) wire is OK. Go to step 12.

    NO 

    Repair an open in the wire between the EPS control unit and the DC-DC converter IG1 relay.

12. Open wire check (+B DC1 OUT2 line)

    - 1. Disconnect the following connector.

    DC-DC converter connector B (5P)

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector A (11P): disconnected
    	DC-DC converter IG1 relay: removed
    	DC-DC converter connector B (5P): disconnected
    Test point 1	DC-DC converter IG1 relay 4P socket No. 2
    Test point 2	DC-DC converter connector B (5P) No. 5

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

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

    Is there continuity?

    YES 

    The +B DC1 OUT2 wire is OK. Go to step 13.

    NO 

    Repair an open in the wire between the DC-DC converter IG1 relay and the DC-DC converter.

13. Open wire check (IG1 ACG line)

    - 1. Turn the vehicle to the ON mode.

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

    Test condition	Vehicle ON mode
    	EPS control unit connector A (11P): disconnected
    	DC-DC converter IG1 relay: removed
    	DC-DC converter connector B (5P): disconnected
    Test point 1	DC-DC converter IG1 relay 4P socket No. 3
    Test point 2	Body ground

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

    Is there battery voltage?

    YES 

    The IG1 ACG wire is OK. Go to step 14.

    NO 

    Repair an open in the wire between the under-dash fuse/relay box and the DC-DC converter IG1 relay.

14. Open wire check (GND line) 1

    - 1. Turn the vehicle to the OFF (LOCK) mode.

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector A (11P): disconnected
    	DC-DC converter IG1 relay: removed
    	DC-DC converter connector B (5P): disconnected
    Test point 1	DC-DC converter IG1 relay 4P socket No. 4
    Test point 2	Body ground

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

    Is there continuity?

    YES 

    The GND wire is OK. Replace the DC-DC converter .

    NO 

    Repair an open or high resistance in the wire between the DC-DC converter IG1 relay and body ground (G306).

15. Open wire check (+B EPS line)

    - 1. Turn the vehicle to the OFF (LOCK) mode.

    - 2. Disconnect the following connector.

    EPS control unit connector A (11P)

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector A (11P): disconnected
    Test point 1	EPS control unit connector A (11P) No. 2 - Refer to: EPS Control Unit Connector for Inputs and Outputs (With Auto Idle Stop System) (2015-17),  or EPS Control Unit Connector for Inputs and Outputs (Without Auto Idle Stop System) (2015-17)
    Test point 2	Body ground

    Is there battery voltage?

    YES 

    The +B EPS wire is OK. Go to step 16.

    NO 

    Repair an open in the wire between the EPS control unit and the No. A1-1 (70A) fuse.

16. Open wire check (GND line) 2

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector A (11P): disconnected
    Test point 1	EPS control unit connector A (11P) No. 1 - Refer to: EPS Control Unit Connector for Inputs and Outputs (With Auto Idle Stop System) (2015-17),  or EPS Control Unit Connector for Inputs and Outputs (Without Auto Idle Stop System) (2015-17)
    Test point 2	Body ground

    Is there continuity?

    YES 

    The GND wire is OK. Go to step 17.

    NO 

    Repair an open in the wire between the EPS control unit and body ground (G201).

17. Open wire check (F-CAN A_H, F-CAN A_L lines)

    - 1. Disconnect the following connectors.

    Gauge control module 32P connector

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector A (11P): disconnected
    	Gauge control module 32P connector: disconnected
    Test point 1	EPS control unit connector (11P) No. 10 - Refer to: EPS Control Unit Connector for Inputs and Outputs (With Auto Idle Stop System) (2015-17),  or EPS Control Unit Connector for Inputs and Outputs (Without Auto Idle Stop System) (2015-17)
    Test point 2	Gauge control module 32P connector No. 27 - Refer to: Gauge Control Module Connector for Inputs and Outputs (Without SH-AWD) (2015-17), or Gauge Control Module Connector for Inputs and Outputs (With SH-AWD) (2015-17)

    Test point 1	EPS control unit connector (11P) No. 11 - Refer to: EPS Control Unit Connector for Inputs and Outputs (With Auto Idle Stop System) (2015-17),  or EPS Control Unit Connector for Inputs and Outputs (Without Auto Idle Stop System) (2015-17)
    Test point 2	Gauge control module 32P connector No. 28 - Refer to: Gauge Control Module Connector for Inputs and Outputs (Without SH-AWD) (2015-17), or Gauge Control Module Connector for Inputs and Outputs (With SH-AWD) (2015-17)

    Is there continuity?

    YES 

    The F-CAN A_H and F-CAN A_L wires are OK. Go to step 18.

    NO 

    Repair an open in the wire between the EPS control unit and the gauge control module.

18. EPS control unit check (update)

    - 1. Reconnect the following connectors.

    EPS control unit connector A (11P)

    Gauge control module 32P connector

    - 2. Update the EPS control unit if it does not have the latest software.

    - 3. Turn the vehicle to the OFF (LOCK) mode.

    - 4. Start the engine.

    - 5. Check the EPS indicator.

    Does the EPS indicator come on, then go off?

    YES 

    Troubleshooting is complete.

    NO 

    Replace the EPS control unit .

Do the gauge control module self-diagnostic function - Refer to: Gauges Self-Diagnostic Function (Without SH-AWD), or Gauges Self-Diagnostic Function (With SH-AWD) .