DLC Circuit Troubleshooting (Without ACC)

DLC Circuit Troubleshooting 

NOTE:  If you suspect the HDS or the HDS DLC cable may be the source of the communication problem, verify that they are working properly by connecting them to a known-good, similar vehicle and system, and checking for communication problems.

1. HDS communication check

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

   -2. Connect the HDS to the data link connector .

   NOTE:  Make sure the HDS is properly connected to the data link connector.

   -3. Turn the vehicle to the ON mode, and turn on the HDS.

   Does the HDS identify the vehicle?

   YES 

   Go to step 2.

   NO 

   Go to step 12.

2. Determine possible failure area (PGM-FI system, other systems)

   -1. Check for Pending or Confirmed DTCs in the PGM-FI system with the HDS.

   DTC Description	Confirmed DTC	Pending DTC

   DTC (PGM-FI)

   Are any Pending or Confirmed DTCs indicated?

   YES 

   Go to the indicated DTCs troubleshooting.

   NO 

   If the HDS does not communicate with the SRS, go to step 3.

   NO 

   If the HDS does not communicate with the VSA system, go to step 4.

   NO 

   If the HDS does not communicate with the EPS system, go to step 5.

   NO 

   If the HDS does not communicate with the ELECTRIC BRAKE BOOSTER system, go to step 6.

   NO 

   If the HDS does not communicate with the ONE PUSH START system, go to step 7.

   NO 

   If the HDS does not communicate with the BODY ELECTRICAL system, go to step 8.

3. SRS check

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

   -2. Turn the vehicle to the ON mode, and watch the SRS indicator.

   Does the SRS indicator come on and go off?

   YES 

   Go to step 9.

   NO 

   Go to the symptom troubleshooting for SRS indicator stays on, but no DTCs are stored, or cannot be read .

4. VSA system check

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

   -2. Turn the vehicle to the ON mode, and watch the VSA indicator.

   Does the VSA indicator come on and go off?

   YES 

   The VSA system is OK. Go to step 9.

   NO 

   Go to the symptom troubleshooting for ABS indicator, brake system indicator (red), VSA indicator, and brake system indicator (amber) do not go off .

5. EPS system check

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

   -2. Start the engine, and watch the EPS indicator.

   Does the EPS indicator come on and go off?

   YES 

   The EPS system is OK. Go to step 9.

   NO 

   Go to the symptom troubleshooting for EPS indicator does not go off, and no DTCs are stored .

6. Electric brake booster system check

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

   -2. Turn the vehicle to the ON mode, and watch the brake system indicator (amber).

   Does the brake system indicator (amber) come on and go off?

   YES 

   The electric brake booster system is OK. Go to step 9.

   NO 

   Go to the electric brake booster symptom troubleshooting for brake system indicator (red) and brake system indicator (amber) do not go off .

7. Keyless access system check

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

   -2. Turn the vehicle to the ON mode, and watch the security indicator.

   Does the security indicator stay on or blinkΩ

   YES 

   Go to the keyless access system symptom troubleshooting information .

   NO 

   The keyless access system is OK. Go to step 9.

8. Body electrical system check

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

   -2. Check the gauge display.

   Is B-CAN ERROR (or Error 2) indicated?

   YES 

   Check for DTCs in the body electrical system and troubleshoot the indicated DTCs.

   NO 

   Go to step 9.

9. Open wire check (K LINE line or L-LINE line)

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

   -2. Disconnect the HDS from the data link connector.

   Disconnect the control unit (s) on the K LINE or L-LINE that does not communicate.

   NOTE:  Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure and wait for at least 3 minutes.

   K LINE 

   • Audio unit connector A (24P) (without navigation)
   • Audio-navigation unit connector A (24P) (with navigation)
   • Active noise cancellation unit 20P connector
   • Body control module connector B (66P)

   L-LINE 

   • SRS unit connector A (43P)
   • Body control module connector C (66P)

   -4. Check for continuity between data link connector (16P: ) No. 7 (K LINE line) and these connector terminals, or data link connector (16P: ) No. 15 (L-LINE line) and these connector terminals:

   K LINE 

   Connector	Terminal
   Audio unit connector A (24P) (without navigation)	No. 12
   Audio-navigation unit connector A (24P) (with navigation)	No. 12
   Active noise cancellation unit 20P connector	No. 14
   Body control module connector B (66P)	No. 38

   L-LINE 

   Connector	Terminal
   SRS unit connector A (43P)	No. 18
   Body control module connector C (66P)	No. 53

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

   Is there continuity between the data link connector and the terminals in the chart?

   YES 

   Go to step 10.

   NO 

   Repair an open in the wire between the data link connector (K LINE wire or L-LINE wire) and the appropriate connector.

10. Determine possible failure area (short in K LINE line or L-LINE line, others)

    -1. Reconnect all connectors.

    -2. If the 12 volt battery negative terminal is disconnected in step 9-3, do the 12 volt battery terminal reconnection procedure .

    -3. Turn the vehicle to the ON mode.

    -4. Measure the voltage between test points 1 and 2.

    Test condition	Vehicle ON mode
    Test point 1	Data link connector (16P) (female terminal) No. 7 and No. 15:
    Test point 2	Body ground

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

    Is there any voltage?

    YES 

    Go to step 12.

    NO 

    Go to step 11.

11. Shorted wire check (K LINE line, L-LINE line):

    Continue to measure the voltage between data link connector (16P) No. 7 (K LINE line) and body ground, or data link connector (16P) No. 15 (L-LINE line) and body ground while disconnecting these parts, one at a time:

    NOTE:  Turn the vehicle to the OFF (LOCK) mode before disconnecting the connector, and turn the vehicle to the ON mode before measuring the voltage.

    K LINE 

    • Audio unit connector A (24P) (without navigation)
    • Audio-navigation unit connector A (24P) (with navigation)
    • Active noise cancellation unit 20P connector
    • Body control module connector B (66P)

    L-LINE 

    • SRS unit connector A (43P)
    • Body control module connector C (66P)

    Does voltage come back when one of the above components is disconnected?

    YES 

    Replace the part that any voltage was detected when it was disconnected.

    NO 

    Repair a short in the wire between data link connector (16P) No. 7 (K LINE) and the audio unit (without navigation), audio-navigation unit (with navigation), the active noise cancellation unit, or the body control module, or data link connector (16P) No. 15 (L-LINE) and the body control module or the SRS unit.

12. Body electrical system (B-CAN) check

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

    -2. Check for gauge control module DTCs without the HDS.

    Is DTC U0029 and/or U0100 indicated?

    YES 

    Go to the PCM power and ground circuit troubleshooting .

    NO 

    Go to step 13.

13. Open wire check (+B BACK UP line)

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

    -2. Disconnect the HDS from the data link connector.

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

    Test condition	Vehicle OFF (LOCK) mode
    Test point 1	Data link connector (16P) (female terminal) No. 16:
    Test point 2	Body ground

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

    Is there battery voltage?

    YES 

    Go to step 14.

    NO 

    Repair an open in the +B BACK UP wire between data link connector (16P) No. 16 and the No. A27 fuse .

14. Open wire check (GND line)

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

    Test condition	Vehicle OFF (LOCK) mode
    Test point 1	Data link connector (16P) (female terminal) No. 4:
    Test point 2	Data link connector (16P) (female terminal) No. 16:

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

    Is there battery voltage?

    YES 

    Go to step 15.

    NO 

    Repair an open in the GND wire between data link connector (16P) No. 4 and G501.

15. Open wire check (F-CAN A_H line)

    -1. Jump the SCS line with the HDS, and wait more than 1 minute.

    -2. Disconnect the following connector.

    PCM connector A (50P)

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (50P): disconnected
    Test point 1	PCM connector A (50P) No. 37
    Test point 2	Data link connector (16P) (female terminal) No. 6:

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

    Is there continuity?

    YES 

    The F-CAN A_H wire is not open. Go to step 16.

    NO 

    Repair an open in the F-CAN A_H wire between the PCM (A37) and the data link connector (16P) No. 6.

16. Open wire check (F-CAN A_L line)

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (50P): disconnected
    Test point 1	PCM connector A (50P) No. 36
    Test point 2	Data link connector (16P) (female terminal) No. 14:

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

    Is there continuity?

    YES 

    The F-CAN A_L wire is not open. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

    NO 

    Repair an open in the F-CAN A_L wire between the PCM (A36) and data link connector (16P) No. 14.