Data Link Connector: Testing and Inspection

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, like vehicle and system, and checking for communication problem.

1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

2. Connect the HDS to the DLC.

3. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and read the HDS.

Does the HDS identify the vehicle?

YES -

Go to step 4.

NO -

Go to step 27.

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

Are any Pending or Confirmed DTCs indicated?

YES -

Go to the indicated DTC's troubleshooting.�

NO -

- If the HDS does not communicate with the SRS, go to step 5.
- If the HDS does not communicate with the VSA system, go to step 7.
- If the HDS does not communicate with the EPS, go to step 9.
- If the HDS does not communicate with the SH-AWD system, go to step 11.
- If the HDS does not communicate with the TPMS, go to step 13.
- If the HDS does not communicate with the IMMOBI (immobilizer) system, go to step 15.
- If the HDS does not communicate with the ONE PUSH START system, go to step 17.
- If the HDS does not communicate with the BODY ELECTRICAL system, go to step 19.

5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

6. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and watch the SRS indicator.

Does the SRS indicator come on and go off?

YES -

Go to step 21.

NO -

Go to the SRS general troubleshooting information Reading and Clearing Diagnostic Trouble Codes.�

7. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

8. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and watch the VSA indicator.

Does the VSA indicator come on and go off?

YES -

Go to step 21.

NO -

Go to the symptom troubleshooting for ABS indicator, brake system indicator, VSA indicator do not go off ABS Indicator, Brake System Indicator, and VSA Indicator Do Not Go Off.�

9. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

10. Start the engine, and watch the EPS indicator.

Does the EPS indicator come on and go off?

YES -

Go to step 21.

NO -

Go to the symptom troubleshooting for EPS indicator dose not go off, and no DTCs are stored EPS Indicator Does Not Go Off, and No DTCs Are Stored.�

11. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

12. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and watch the SH-AWD indicator.

Does the SH-AWD indicator come on and go off?

YES -

Go to step 21.

NO -

Go to the symptom troubleshooting for SH-AWD indicator dose not go off, and no DTCs are stored Symptom Troubleshooting.�

13. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

14. Turn the ignition switch to ON (II), and watch the TPMS indicator.

Does the TPMS indicator come on and go off?

YES -

Go to step 21.

NO -

Go to the symptom troubleshooting for TPMS indicator dose not go off, and no DTCs are stored TPMS Indicator Does Not Go Off, and No DTCs Are Stored.�

15. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

16. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and watch the immobilizer indicator.

Does the immobilizer indicator stay on or flash?

YES -

Go to the immobilizer system's troubleshooting; without keyless access Immobilizer System Symptom Troubleshooting Information (Without Keyless Access System), with keyless access Keyless Access System Symptom Troubleshooting Information.�

NO -

Go to step 21.

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

18. Press the engine start/stop button to select the ON mode, and watch the keyless access indicator.

Does the keyless access indicator stay on?

YES -

Go to the keyless access system general troubleshooting information Initial Inspection and Diagnostic Overview.�

NO -

Go to step 21.

19. Do the gauge self-diagnostic function Initial Inspection and Diagnostic Overview.

20. Check the gauge display.

Is B-CAN------ERROR indicated?

YES -

Check for B-CAN system DTC's Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS).�

NO -

Go to step 21.

21. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

22. Disconnect the HDS from the DLC.

23. Check for continuity between DLC terminal No. 7 and body ground (with keyless access; between body ground and DLC terminals No. 1 and No. 7 individually).

Is there continuity?

YES -

Go to step 24.

NO -

Go to step 25.

24. Continue to check for continuity between DLC terminal No. 7 and body ground (with keyless access; between body ground and DLC terminals No. 1 and No. 7 individually), while disconnecting these connectors, one at a time:

- SRS unit A (39P)
- VSA modulator-control unit 47P
- EPS control unit D (28P)
- SH-AWD control unit A (20P) (with SH-AWD)
- TPMS control unit 20P
- Immobilizer-keyless control unit 7P (without keyless access)
- Audio unit A (24P) (without navigation)
- Audio-navigation unit A (24P) (with navigation)
- Driver's under-dash fuse/relay box Q (20P)
- Remote slot control unit 40P (with keyless access)
- Keyless access control unit B (32P) (with keyless access)
- Power control unit C (36P) (with keyless access)

Does continuity go away when one of the above connectors is disconnected?

YES -

Replace the part that caused continuity go away when it was disconnected.�

NO -

Repair short in the wire between the DLC No. 7(K-Line) and the VSA modulator-control unit, the EPS control unit, the SH-AWD control unit, the SRS unit, the TPMS control unit, the immobilizer-keyless control unit, the audio unit, the audio-navigation unit, the driver's under-dash fuse/relay box, the remote slot control unit, the keyless access control unit, or the DLC No. 1 (Diag-H line) and the power control unit (with keyless access).�

25. Connect DLC terminal No. 7 to body ground with a jumper wire (with keyless access system, also connect DLC terminal No. 1 to body ground with a jumper wire).

26. Check for continuity between body ground and these connector terminals:

Is there continuity between the body ground and each of the terminals in the chart?

YES -

Replace the part that does not communicate with the HDS.�

NO -

Repair open in the wire between the DLC (K-Line or Diag-H) and the appropriate connector.�

27. Check for B-CAN system DTCs without the HDS Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS).

Is DTC U0029 and/or U0100 indicated?

YES -

Go to step 38.

NO -

Go to step 28.

28. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

29. Disconnect the HDS from the DLC.

30. Measure the voltage between DLC terminal No. 16 and body ground.

Is there battery voltage?

YES -

Go to step 31.

NO -

Repair open in the wire between DLC terminal No. 16 and the No. 15 BACK UP (10 A) fuse in the under-hood fuse/relay box.�

31. Measure the voltage between DLC terminals No. 4 and No. 16.

Is there battery voltage?

YES -

Go to step 32.

NO -

Repair open in the wire between DLC terminal No. 4 and body ground (G401).�

32. Connect the HDS to the DLC.

33. Jump the SCS line with the HDS.

34. Disconnect ECM/PCM connector A (49P).

35. Disconnect the HDS from the DLC.

36. Check for continuity between ECM/PCM connector terminal A48 and DLC terminal No. 6.

Is there continuity?

YES -

Go to step 37.

NO -

Repair open in the wire between the ECM/PCM(A48) and DLC terminal No. 6.�

37. Check for continuity between ECM/PCM connector terminal A49 and DLC terminal No. 14.

Is there continuity?

YES -

Update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away and the ECM/PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair.�

NO -

Repair open in the wire between the ECM/PCM(A49) and DLC terminal No. 14.�

38. Try to start the engine.

Does the engine start and idle?

YES -

Go to the F-CAN circuit troubleshooting F-CAN Circuit Troubleshooting.�

NO -

- If the starter does not crank, go to step 39.
- If the starter cranks, turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode; and go to step 41.

39. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

40. Check the No. 3-1 IG MAIN (50 A) fuse in the under-hood fuse/relay box.

Is the fuse OK?

YES -

Repair open in the wire between the No. 3-1 IG MAIN (50 A) fuse and the ignition switch (without keyless access) or power control unit (with keyless access). If the wire is OK, go to step 41.

NO -

Repair short in the wire between the No. 3-1 IG MAIN (50 A) fuse and the ignition switch (without keyless access) or power control unit (with keyless access). Also replace the No. 3-1 IG MAIN (50 A) fuse.�

41. Inspect the No. 17 FI MAIN (15 A) fuse in the under-hood fuse/relay box.

Is the fuse OK?

YES -

Go to step 48.

NO -

Go to step 42.

42. Remove the blown No. 17 FI MAIN (15 A) fuse from the under-hood fuse/relay box.

43. Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.

44. Check for continuity between body ground and PGM-FI main relay 1 4P connector terminals No. 1 and No. 4 individually.

Is there continuity?

YES -

Replace the under-hood fuse/relay box Under-Hood Fuse/Relay Box Removal and Installation. Also replace the No. 17 FI MAIN(15 A)fuse.�

NO -

Go to step 45.

45. While disconnecting each of the parts or connectors below, one at a time, check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and body ground:

- PGM-FI main relay 2
- ECM/PCM connector B (49P)
- Each injector 2P connector
- CMP sensor 3P connector
- CKP sensor 3P connector
- MAF sensor/IAT sensor 5P connector
- Electronic throttle control system (ETCS) control relay

Does continuity go away when one of the above parts or connectors is disconnected?

YES -

Replace the part that made the short to body ground go away when disconnected. If the part is the ECM/PCM, update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away and the ECM/PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair. Also replace the No. 17 FI MAIN (15 A)fuse.�

NO -

Go to step 46.

46. Disconnect the connectors from these components:

- PGM-FI main relay 2
- ECM/PCM connector B (49P)
- Injectors
- CMP sensor
- CKP sensor
- MAF sensor/IAT sensor
- Electronic throttle control system (ETCS) control relay

47. Check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and body ground.

Is there continuity?

YES -

Repair short in the wire between PGM-FI main relay 1 and each part. Also replace the No. 17 FI MAIN (15 A) fuse.�

NO -

Replace PGM-FI main relay 1. Also replace the No. 17 FI MAIN (15 A) fuse.�

48. Inspect the No. 9 FUEL PUMP (20 A) fuse in the driver's under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 62.

NO -

Go to step 49.

49. Remove the blown No. 9 FUEL PUMP (20 A) fuse from the driver's under-dash fuse/relay box.

50. Remove the driver's dashboard undercover Driver's Dashboard Undercover Removal/Installation, then remove PGM-FI main relay 2 (A) from the driver's under-dash fuse/relay box.

51. Test PGM-FI main relay 2 Testing and Inspection.

Is the relay OK?

YES -

Go to step 52.

NO -

Replace PGM-FI main relay 2. Also replace the No. 9 FUEL PUMP (20 A) fuse.�

52. Check for continuity between PGM-FI main relay 2 4P connector terminal No. 2 and body ground.

Is there continuity?

YES -

Go to step 53.

NO -

- '09 model without SH-AWD, '10-11 models: Go to step 56.
- '09 model with SH-AWD: Go to step 60.

53. Jump the SCS line with the HDS.

54. Disconnect ECM/PCM connector B (49P).

55. Check for continuity between ECM/PCM connector terminal B42 and body ground.

Is there continuity?

YES -

Repair short in the wire between the No. 9 FUEL PUMP (20 A) fuse and the ECM/PCM (B42), between the No. 9 FUEL PUMP (20 A) fuse and PGM-FI main relay 2, or between the No. 9 FUEL PUMP (20 A) fuse and the immobilizer control unit. Also replace the No. 9 FUEL PUMP (20 A) fuse.�

NO -

Replace the No. 9 FUEL PUMP (20 A) fuse, and update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away and the ECM/PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair.�

56. Remove the rear seat cushion Rear Seat Removal/Installation.

57. Remove the access panel from the floor Fuel Tank Unit Removal/Installation.

58. Disconnect the fuel pump 4P connector.

59. Check for continuity between fuel pump 4P connector terminal No. 2 and body ground.

Is there continuity?

YES -

Repair short in the wire between the fuel pump and PGM-FI main relay 2. Also replace the No. 9 FUEL PUMP (20 A) fuse.�

NO -

Check the fuel pump, and replace it if needed Fuel Pump/Fuel Gauge Sending Unit Replacement. Also replace the No. 9FUEL PUMP(20 A) fuse.�

60. Disconnect the fuel pump control module 10P connector Service and Repair.

61. Check for continuity between fuel pump control module 10P connector terminal No. 3 and body ground.

Is there continuity?

YES -

Repair short in the wire between the fuel pump control module and PGM-FI main relay 2. Also replace the No. 9 FUEL PUMP (20 A) fuse.�

NO -

Replace the No. 9FUEL PUMP(20 A) fuse, and substitute a known-good fuel pump control module Service and Repair, then recheck. If the symptom/indication goes away with a known-good fuel pump control module, replace the original fuel pump control module Service and Repair.�

62. Jump the SCS line with the HDS.

63. Disconnect ECM/PCM connectors A (49P) and B (49P).

64. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

65. Measure the voltage between ECM/PCM connector terminal B42 and body ground.

Is there battery voltage?

YES -

Go to step 66.

NO -

Repair open in the wire between the No. 9 FUEL PUMP (20 A) fuse and the ECM/PCM(B42).�

66. Measure the voltage between ECM/PCM connector terminal A6 and body ground.

Is there battery voltage?

YES -

Go to step 71.

NO -

Go to step 67.

67. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

68. Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.

69. Measure the voltage between PGM-FI main relay 1 4P connector terminal No. 4 and body ground.

Is there battery voltage?

YES -

Go to step 70.

NO -

Replace the under-hood fuse/relay box Under-Hood Fuse/Relay Box Removal and Installation.�

70. Check for continuity between PGM-FI main relay 1 4P connector terminal No. 3 and ECM/PCM connector terminal A6.

Is there continuity?

YES -

Test PGM-FI main relay 1 Testing and Inspection. If the relay is OK, update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away and the ECM/PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair.�

NO -

Repair open in the wire between the ECM/PCM (A6) and PGM-FI main relay 1.�

71. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

72. Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.

73. Measure the voltage between PGM-FI main relay 1 4P connector terminal No. 1 and body ground.

Is there battery voltage?

YES -

Go to step 74.

NO -

Replace the under-hood fuse/relay box Under-Hood Fuse/Relay Box Removal and Installation.�

74. Check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and ECM/PCM connector terminal B3.

Is there continuity?

YES -

Go to step 75.

NO -

Repair open in the wire between the ECM/PCM(B3) and PGM-FI main relay 1.�

75. Test PGM-FI main relay 1 Testing and Inspection.

Is PGM-FI main relay 1 OK?

YES -

Go to step 76.

NO -

Replace PGM-FI main relay 1.�

76. Disconnect ECM/PCM connectors A (49P), B (49P), and C (49P).

77. Check for continuity between body ground and ECM/PCM connector terminals A41, B1, B40, B41, C1, and C41 individually.