EPS indicator does not go off (With CAN Gateway (With Auto Idle Stop System)) (2020 2021)

NOTE: 

• The indicator comes on when the reprogramming fails.
• Do the reprogramming of the EPS control unit again.
• The all sensor learn in the VSA system may not have properly completed.

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. Refer to intermittent failures troubleshooting .

   NO 

   Go to step 2.

2. All DTCs check

   -1. All DTCs check with the HDS.

   All DTCs

   Are there DTCs indicated?

   YES 

   Go to indicated DTC's troubleshooting.

   NO 

   Go to step 3.

3. Fuse check 1

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

   -2. Check the following fuse.

   Fuse

   No. A2-1

   Is the fuse OK?

   YES 

   The fuse is OK. Reinstall the fuse, then go to step 4.

   NO 

   Replace the fuse. If the fuse blows again, repair a short to ground in the No. A2-1 fuse circuit.

4. Fuse check 2

   -1. Check the following fuse.

   Fuse

   No. D34

   Is the fuse OK?

   YES 

   The fuse is OK. Reinstall the fuse, then go to step 5.

   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. D34 fuse circuit.

5. Fuse check 3

   -1. Check the following fuse.

   Fuse

   No. F5

   Is the fuse OK?

   YES 

   The fuse is OK. Reinstall the fuse, then go to step 6.

   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. F5 fuse circuit.

6. DC-DC converter IG1 relay 2 check

   -1. Remove the DC-DC converter IG1 relay 2 , and test it .

   Is the relay OK?

   YES 

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

   NO 

   Replace the DC-DC converter IG1 relay 2 .

7. Open wire check (IG1 RELAY1/IG1 line)

   -1. Disconnect the following connector.

   EPS control unit connector B (6P)

   -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 B (6P): disconnected
   Test point 1	EPS control unit connector B (6P) No. 5
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   The IG1 RELAY1/IG1 wire is OK. Go to step 12.

   NO 

   Go to step 8.

8. Open wire check (IG1 RELAY1/IG1, IG1 RLY2 OUT lines)

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

   -2. Remove the DC-DC converter IG1 relay 2 .

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

   Test condition	Vehicle OFF (LOCK) mode
   	EPS control unit connector B (6P): disconnected
   	DC-DC converter IG1 relay 2: removed
   Test point 1	EPS control unit connector B (6P) No. 5
   Test point 2	DC-DC converter IG1 relay 2 4P socket (female terminals) No. 1:

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

   Is there 1.0 Ω or less?

   YES 

   The IG1 RELAY1/IG1 and the IG1 RLY2 OUT wires are OK. Go to step 9.

   NO 

   Repair an open in the wire between the EPS control unit and the DC-DC converter IG1 relay 2.

9. Open wire check (DCDC OUT2 line)

   -1. Disconnect the following connector.

   DC-DC converter connector B (5P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	EPS control unit connector B (6P): disconnected
   	DC-DC converter IG1 relay 2: removed
   	DC-DC converter connector B (5P): disconnected
   Test point 1	DC-DC converter IG1 relay 2 4P socket (female terminals) No. 2:
   Test point 2	DC-DC converter connector B (5P) (female terminals) No. 5:

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

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

   Is there 1.0 Ω or less?

   YES 

   The DCDC OUT2 wire is OK. Go to step 10.

   NO 

   Repair an open in the wire between the DC-DC converter and the DC-DC converter IG1 relay 2.

10. Open wire check (IG1 VSA/ABS 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 B (6P): disconnected
    	DC-DC converter IG1 relay 2: removed

    	DC-DC converter connector B (5P): disconnected
    Test point 1	DC-DC converter IG1 relay 2 4P socket (female terminals) No. 3:
    Test point 2	Body ground

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

    Is there battery voltage?

    YES 

    The IG1 VSA/ABS wire is OK. Go to step 11.

    NO 

    Repair an open in the wire between the under-dash fuse/relay box and the DC-DC converter IG1 relay 2.

11. Open wire check (GND line)

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

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector B (6P): disconnected
    	DC-DC converter IG1 relay 2: removed
    	DC-DC converter connector B (5P): disconnected
    Test point 1	DC-DC converter IG1 relay 2 4P socket (female terminals) No. 4:
    Test point 2	Body ground

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

    Is there 1.0 Ω or less?

    YES 

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

    NO 

    Repair an open in the wire between the DC-DC converter IG1 relay 2 and body ground (G402).

12. 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 (2P)

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector A (2P): disconnected
    	EPS control unit connector B (6P): disconnected
    Test point 1	EPS control unit connector A (2P) No. 2

    Test point 2

    Body ground

    Is there battery voltage?

    YES 

    The +B EPS wire is OK. Go to step 13.

    NO 

    Repair an open in the wire between the under-hood fuse/relay box and the EPS control unit.

13. Open wire check (GND line)

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector A (2P): disconnected
    	EPS control unit connector B (6P): disconnected
    Test point 1	EPS control unit connector A (2P) No. 1
    Test point 2	Body ground

    Is there 1.0 Ω or less?

    YES 

    The GND wire is OK. Go to step 14.

    NO 

    Repair an open in the wire between the EPS control unit and body ground (G202).

14. F-CAN circuit communication check

    -1. Reconnect the following connectors.

    EPS control unit connector A (2P)

    EPS control unit connector B (6P)

    -2. Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

    F-CAN Bus Connected Unit Check

    Which result is indicated?

    Gauge control module (Bus A) is Not Available

    Go to step 15.

    EPS control unit (Bus B) is Not Available

    Go to step 16.

    Gauge control module and EPS control unit are Available

    Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting .

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

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

    -2. Disconnect the following connectors.

    Gauge control module connector A (32P)

    CAN gateway 16P connector

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

    Test condition	Vehicle OFF (LOCK) mode
    	Gauge control module connector A (32P): disconnected
    	CAN gateway 16P connector: disconnected
    Test circuit 1
    Test point 1	Gauge control module connector A (32P) No. 19

    Test point 2

    CAN gateway 16P connector (female terminals) No. 3:

    Test circuit 2
    Test point 1	Gauge control module connector A (32P) No. 20
    Test point 2	CAN gateway 16P connector (female terminals) No. 11:

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

    Is there 1.0 Ω or less?

    YES 

    The F-CAN A_H and F-CAN A_L wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or 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 .

    NO 

    Repair an open in the wire between the gauge control module and the CAN gateway.

16. Open wire check (F-CAN B_H, F-CAN B_L lines)

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

    -2. Disconnect the following connectors.

    EPS control unit connector B (6P)

    CAN gateway 16P connector

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

    Test condition	Vehicle OFF (LOCK) mode
    	EPS control unit connector B (6P): disconnected
    	CAN gateway 16P connector: disconnected
    Test circuit 1
    Test point 1	EPS control unit connector B (6P) No. 3
    Test point 2	CAN gateway 16P connector (female terminals) No. 6:

    Test circuit 2
    Test point 1	EPS control unit connector B (6P) No. 1
    Test point 2	CAN gateway 16P connector (female terminals) No. 14:

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

    Is there 1.0 Ω or less?

    YES 

    The F-CAN B_H and F-CAN B_L wires are OK. Check for loose terminals and poor connections at the EPS control unit connectors. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good EPS motor/control unit , then recheck. If the symptom/indication goes away with a known-good EPS motor/control unit, replace the original EPS motor/control unit .

    NO 

    Repair an open in the wire between the EPS control unit and the CAN gateway.