DLC Circuit Troubleshooting (With Multipurpose Camera Unit)

1.

HDS communication check:

HDS communication check

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

?2.	Connect the HDS to the DLC. NOTE: Make sure the HDS is properly connected to the DLC.

?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 14.

2.

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

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

Are any Pending or Confirmed DTCs indicated?


	YES

Go to the indicated DTC's troubleshooting.?


	NO

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


	NO

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


	NO

If the HDS does not communicate with the VSA system, go to step 6.


	NO

If the HDS does not communicate with the EPS system, go to step 7.


	NO

If the HDS does not communicate with the IMMOBI (immobilizer) system, go to step 8.


	NO

If the HDS does not communicate with the ONE-PUSH START system, go to step 9.


	NO

If the HDS does not communicate with the BODY ELECTRICAL system, go to step 10.

3.

Open wire check (F-CAN A_H line):

Open wire check (F-CAN A_H line)

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

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

?3.

Disconnect the following connectors.

CAN gateway 16P connector

PCM connector A (51P)

?4.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	PCM connector A (51P): disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 3:
Test point 2	PCM connector A (51P) No. 2

Is there continuity?


	YES

The F-CAN A_H wire is OK. Go to step 4.


	NO

Repair an open in the F-CAN A_H wire between the PCM (A2) and the CAN gateway.?

4.

Open wire check (F-CAN A_L line):

Open wire check (F-CAN A_L line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	PCM connector A (51P): disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 11:
Test point 2	PCM connector A (51P) No. 1

Is there continuity?


	YES

The F-CAN A_L wire is OK. Check for poor connections or loose terminals at the CAN gateway and the PCM. Go to the PCM power and ground circuit troubleshooting.?


	NO

Repair an open in the F-CAN A_L wire between the PCM (A1) and the CAN gateway.?

5.

SRS check:

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

The SRS is OK. Go to step 11.


	NO

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

6.

VSA system check:

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 11.


	NO

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

7.

EPS system check:

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 11.


	NO

Go to the EPS symptom troubleshooting for EPS indicator does not go off.?

8.

Immobilizer system check:

Immobilizer system check

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

?2.	Turn the vehicle to the ON mode, and watch the immobilizer indicator.

Does the immobilizer indicator stay on or flash?


	YES

Go to the immobilizer system symptom troubleshooting information.?


	NO

The immobilizer system is OK. Go to step 11.

9.

Keyless access system check:

Keyless access system check

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

?2.	Turn the vehicle to the ON mode, and watch the keyless access indicator and the immobilizer indicator.

Does the keyless access indicator stay on or the immobilizer indicator stay on or flash?


	YES

Go to the keyless access system symptom troubleshooting information.?


	NO

The keyless access system is OK. Go to step 11.

10.

Body electrical system check:

Body electrical system check

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

?2.	Check the gauge display.

Is Error 2 indicated?


	YES

Go to the indicated DTC's troubleshooting.?


	NO

The body electrical system is OK. Go to step 11.

11.

Open wire check (K LINE line or L-LINE line):

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 DLC.

?3.

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)
	Immobilizer-keyless control unit 7P connector (without keyless access system)
	Keyless access control unit connector C (20P) (with keyless access system)
	Under-dash fuse/relay box connector D (24P)

L-LINE

	Keyless access control unit connector C (20P) (with keyless access system)
	SRS unit connector A (39P)

?4.

Check for continuity between DLC (16P) No. 7 (K LINE line) and these connector terminals, or DLC (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
Immobilizer-keyless control unit 7P connector (without keyless access system)	No. 3
Keyless access control unit connector C (20P) (with keyless access system)	No. 4
Under-dash fuse/relay box connector D (24P)	No. 13

L-LINE

Connector	Terminal
Keyless access control unit connector C (20P) (with keyless access system)	No. 6
SRS unit connector A (39P)	No. 33

Is there continuity between the DLC and the terminals in the chart?


	YES

Go to step 12.


	NO

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

12.

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

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 11-3, 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	DLC (16P) (female terminals) No. 7 and No. 15:
Test point 2	Body ground

Is there any voltage?


	YES

Go to step 14.


	NO

Go to step 13.

13.

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

Shorted wire check (K LINE line, L-LINE line)

?1.

Continue to measure the voltage between DLC (16P) No. 7 (K LINE line) and body ground, or DLC (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)
	Immobilizer-keyless control unit 7P connector (without keyless access system)
	Keyless access control unit connector C (20P) (with keyless access system)
	Under-dash fuse/relay box connector D (24P)

L-LINE

	Keyless access control unit connector C (20P) (with keyless access system)
	SRS unit connector A (39P) NOTE: Before disconnecting the SRS unit connector, do the 12 volt battery terminal reconnection procedure and wait for at least 3 minutes.

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 the DLC (16P) No. 7 (K LINE) and the audio unit, the audio navigation unit, the immobilizer-keyless control unit, the keyless access control unit, the under-dash fuse/relay box (MICU), or the DLC (16P) No. 15 (L-LINE) and the keyless access control unit, the SRS unit.?

14.

Body electrical system (B-CAN) check:

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

Do the PCM power and ground circuit troubleshooting.?


	NO

Go to step 15.

15.

Open wire check (+B BACK UP line):

Open wire check (+B BACK UP line)

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

?2.	Disconnect the HDS from the DLC.

?3.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
Test point 1	DLC (16P) (female terminals) No. 16:
Test point 2	Body ground

Is there battery voltage?


	YES

The +B BACK UP wire is OK. Go to step 16.


	NO

Repair an open in the +B BACK UP wire between DLC (16P) No. 16 and the No. B29 (10 A) fuse in the under-hood fuse/relay box.?

16.

Open wire check (GND line):

Open wire check (GND line)

?1.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
Test point 1	DLC (16P) (female terminals) No. 4:
Test point 2	DLC (16P) (female terminals) No. 16:

Is there battery voltage?


	YES

The GND wire is OK. Go to step 17.


	NO

Repair an open in the GND wire between DLC (16P) No. 4 and G401.?

17.

Open wire check (IG1 METER line):

Open wire check (IG1 METER line)

?1.

Disconnect the following connector.

CAN gateway 16P connector

?2.	Turn the vehicle to the ON mode.

?3.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	CAN gateway 16P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 9:
Test point 2	Body ground

Is there battery voltage?


	YES

The IG1 METER wire is OK. Go to step 18.


	NO

Repair an open in the IG1 METER wire between the CAN gateway and the No. C34 (7.5 A) fuse in the under-dash fuse/relay box.?

18.

Open wire check (GND line):

Open wire check (GND line)

?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
	CAN gateway 16P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 12:
Test point 2	Body ground

Is there continuity?


	YES

The GND wire is OK. Go to step 19.


	NO

Repair an open in the GND wire between the CAN gateway and G403.?

19.

Open wire check (DIAG-CAN_H line):

Open wire check (DIAG-CAN_H line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 2:
Test point 2	DLC (16P) (female terminals) No. 6:

Is there continuity?


	YES

The DIAG-CAN_H wire is not open. Go to step 20.


	NO

Repair an open in the DIAG-CAN_H wire between the CAN gateway and the DLC (16P) No. 6.?

20.

Open wire check (DIAG-CAN_L line):

Open wire check (DIAG-CAN_L line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 10:
Test point 2	DLC (16P) (female terminals) No. 14:

Is there continuity?


	YES

The DIAG-CAN_L wire is not open. Go to step 21.


	NO

Repair an open in the DIAG-CAN_L wire between the CAN gateway and the DLC (16P) No. 14.?

21.

Shorted wire check (DIAG-CAN_H line):

Shorted wire check (DIAG-CAN_H line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
Test point 1	DLC (16P) (female terminals) No. 6:
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the DIAG-CAN_H wire between the CAN gateway and the DLC (16P) No. 6.?


	NO

The DIAG-CAN_H wire is not shorted to ground. Go to step 22.

22.

Shorted wire check (DIAG-CAN_L line):

Shorted wire check (DIAG-CAN_L line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
Test point 1	DLC (16P) (female terminals) No. 14:
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the DIAG-CAN_L wire between the CAN gateway and the DLC (16P) No. 14.?


	NO

The DIAG-CAN_L wire is not shorted to ground. Go to step 23.

23.

Shorted wire check (DIAG-CAN_H line to DIAG-CAN_L line):

Shorted wire check (DIAG-CAN_H line to DIAG-CAN_L line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
Test point 1	DLC (16P) (female terminals) No. 6:
Test point 2	DLC (16P) (female terminals) No. 14:

Is there continuity?


	YES

Repair a short in the DIAG-CAN_H wire to the DIAG-CAN_L wire between DLC (16P) No. 6 and No. 14.?


	NO

The DIAG-CAN_H wire and the DIAG-CAN_L wire are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good CAN gateway, then recheck. If the HDS identifies the vehicle and the CAN gateway was substituted, replace the original CAN gateway.?