F-CAN Circuit Troubleshooting (Without Multipurpose Camera Unit)

1.

F-CAN circuit resistance check:

F-CAN circuit resistance check

?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 connector.

PCM connector A (51P)

?4.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
Test point 1	PCM connector A (51P) No. 1
Test point 2	PCM connector A (51P) No. 2

Is there about 87?119 ??


	YES

Go to step 10


	NO

Go to step 2.

2.

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

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

?1.

Disconnect the following connectors.

	Gauge control module 32P connector
	VSA modulator-control unit 38P connector (with VSA)
	Steering angle sensor 4P connector (with VSA)
	ABS modulator-control unit 38P connector (without VSA)
	EPS control unit connector B (6P) (KA/KC models)
	EPS control unit connector B (5P) (KX models)
	Keyless access control unit connector C (20P) (with keyless access system)
	SRS unit connector A (39P)
	Audio unit connector C (24P) (with display audio)

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	VSA modulator-control unit 38P connector (with VSA): disconnected
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA): disconnected
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	PCM connector A (51P) No. 1
Test point 2	PCM connector A (51P) No. 2

Is there continuity?


	YES

Repair a short in the F-CAN_H wire to F-CAN_L wire between PCM terminals A1 and A2.?


	NO

The F-CAN_H and F-CAN_L wires are not shorted. Go to step 3.

3.

Open wire check (F-CAN_H line) 1:

Open wire check (F-CAN_H line) 1

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	VSA modulator-control unit 38P connector (with VSA): disconnected
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA): disconnected
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	Gauge control module 32P connector No. 21
Test point 2	PCM connector A (51P) No. 2

Is there continuity?


	YES

The F-CAN_H wire is not open. Go to step 4.


	NO

Repair an open in the F-CAN_H wire between the PCM (A2) and the gauge control module.?

4.

Open wire check (F-CAN_H line) 2:

Open wire check (F-CAN_H line) 2

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	VSA modulator-control unit 38P connector (with VSA): disconnected
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA): disconnected
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	With VSA: VSA modulator-control unit 38P connector No. 38 Without VSA: ABS modulator-control unit 38P connector No. 38
Test point 2	PCM connector A (51P) No. 2

Is there continuity?


	YES

The F-CAN_H wire is not open. Go to step 5.


	NO

Repair an open in the F-CAN_H wire between the PCM (A2) and the VSA modulator-control unit (with VSA) or the ABS modulator-control unit (without VSA).?

5.

Open wire check (F-CAN_H line) 3:

Open wire check (F-CAN_H line) 3

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	VSA modulator-control unit 38P connector (with VSA): disconnected
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA): disconnected
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	EPS control unit connector B (6P) No. 4 (KA/KC models) EPS control unit connector B (5P) No. 1 (KX models)
Test point 2	PCM connector A (51P) No. 2

Is there continuity?


	YES

The F-CAN_H wire is not open. Go to step 6.


	NO

Repair an open in the F-CAN_H wire between the PCM (A2) and the EPS control unit.?

6.

Open wire check (F-CAN_L line) 1:

Open wire check (F-CAN_L line) 1

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	VSA modulator-control unit 38P connector (with VSA): disconnected
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA): disconnected
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	Gauge control module 32P connector No. 22
Test point 2	PCM connector A (51P) No. 1

Is there continuity?


	YES

The F-CAN_L wire is not open. Go to step 7.


	NO

Repair an open in the F-CAN_L wire between the PCM (A1) and the gauge control module.?

7.

Open wire check (F-CAN_L line) 2:

Open wire check (F-CAN_L line) 2

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	VSA modulator-control unit 38P connector (with VSA): disconnected
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA): disconnected
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	With VSA: VSA modulator-control unit 38P connector No. 26 Without VSA: ABS modulator-control unit 38P connector No. 26
Test point 2	PCM connector A (51P) No. 1

Is there continuity?


	YES

The F-CAN_L wire is not open. Go to step 8.


	NO

Repair an open in the F-CAN_L wire between the PCM (A1) and the VSA modulator-control unit (with VSA) or the ABS modulator-control unit (without VSA).?

8.

Open wire check (F-CAN_L line) 3:

Open wire check (F-CAN_L line) 3

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	VSA modulator-control unit 38P connector (with VSA): disconnected
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA): disconnected
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	EPS control unit connector B (6P) No. 3 (KA, KC models) EPS control unit connector B (5P) No. 3 (KX models)
Test point 2	PCM connector A (51P) No. 1

Is there continuity?


	YES

The F-CAN_L wire is not open. Go to step 9.


	NO

Repair an open in the F-CAN_L wire between the PCM (A1) and the EPS control unit.?

9.

Gauge control module internal resistance check:

Gauge control module internal resistance check

?1.	Reconnect the gauge control module 32P connector.

?2.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	VSA modulator-control unit 38P connector (with VSA): disconnected
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA): disconnected
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	PCM connector A (51P) No. 1
Test point 2	PCM connector A (51P) No. 2

Is there about 112?136 ??


	YES

The gauge control module is OK. Go to step 10.


	NO

Replace the gauge control module.?

10.

Shorted wire check (F-CAN_H line):

Shorted wire check (F-CAN_H line)

?1.

Disconnect the following connectors.

	Gauge control module 32P connector
	VSA modulator-control unit 38P connector (with VSA)
	Steering angle sensor 4P connector (with VSA)
	ABS modulator-control unit 38P connector (without VSA)
	EPS control unit connector B (6P) (KA, KC models)
	EPS control unit connector B (5P) (KX models)
	Keyless access control unit connector C (20P) (with keyless access system)
	SRS unit connector A (39P)
	Audio unit connector C (24P) (with display audio)

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	VSA modulator-control unit 38P connector (with VSA)
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA)
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	PCM connector A (51P) No. 2
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the F-CAN_H wire between the PCM (A2) and the gauge control module, the VSA modulator-control unit, the steering angle sensor, the ABS modulator-control unit, the EPS control unit, the keyless access control unit, the SRS unit, the audio unit, or the DLC.?


	NO

The F-CAN_H wire is OK. Go to step 11.

11.

Shorted wire check (F-CAN_L line):

Shorted wire check (F-CAN_L line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	VSA modulator-control unit 38P connector (with VSA)
	Steering angle sensor 4P connector (with VSA): disconnected
	ABS modulator-control unit 38P connector (without VSA)
	EPS control unit connector B (6P) or B (5P): disconnected
	Keyless access control unit connector C (20P) (with keyless access system): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector C (24P) (with display audio): disconnected
Test point 1	PCM connector A (51P) No. 1
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the F-CAN_L wire between the PCM (A1) and the gauge control module, the VSA modulator-control unit, the steering angle sensor, the ABS modulator-control unit, the EPS control unit, the keyless access control unit, the SRS unit, the audio unit, or the DLC.?


	NO

The F-CAN_L wire is OK. Go to step 12.

12.

Gauge control module check:

Gauge control module check

?1.	Reconnect all connectors.

?2.	Connect the HDS to the DLC.

?3.

Disconnect the following connector.

Gauge control module 32P connector

?4.	Turn the vehicle to the ON mode, and read the HDS.

Does the HDS identify the vehicle?


	YES

Replace the gauge control module.?


	NO (with VSA)

Reconnect the gauge control module 32P connector with vehicle in OFF (LOCK) mode, then go to step 13.


	NO (without VSA)

Reconnect the gauge control module 32P connector with vehicle in OFF (LOCK) mode, then go to step 15.

13.

VSA modulator-control unit check:

VSA modulator-control unit check

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

?2.

Disconnect the following connector.

VSA modulator-control unit 38P connector

?3.	Turn the vehicle to the ON mode, and read the HDS.

Does the HDS identify the vehicle?


	YES

Replace the VSA modulator-control unit.?


	NO

Reconnect the VSA modulator-control unit 38P connector with vehicle in OFF (LOCK) mode, then go to step 14.

14.

Steering angle sensor check:

Steering angle sensor check

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

?2.

Disconnect the following connector.

Steering angle sensor 4P connector

?3.	Turn the vehicle to the ON mode, and read the HDS.

Does the HDS identify the vehicle?


	YES

Replace the steering angle sensor.?


	NO (with display audio)

Reconnect the steering angle sensor 4P connector with vehicle in OFF (LOCK) mode, then go to step 16.


	NO (without display audio)

Reconnect the steering angle sensor 4P connector with vehicle in OFF (LOCK) mode, then go to step 17.

15.

ABS modulator-control unit check:

ABS modulator-control unit check

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

?2.

Disconnect the following connector.

ABS modulator-control unit 38P connector

?3.	Turn the vehicle to the ON mode, and read the HDS.

Does the HDS identify the vehicle?


	YES

Replace the ABS modulator-control unit.?


	NO (with display audio)

Reconnect the ABS modulator-control unit 38P connector with vehicle in OFF (LOCK) mode, then go to step 16.


	NO (without display audio)

Reconnect the ABS modulator-control unit 38P connector with vehicle in OFF (LOCK) mode, then go to step 17.

16.

Audio unit check:

Audio unit check

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

?2.

Disconnect the following connector.

Audio unit connector C (24P)

?3.	Turn the vehicle to the ON mode, and read the HDS.

Does the HDS identify the vehicle?


	YES

Replace the audio unit.?


	NO

Reconnect audio unit connector C (24P) with vehicle in OFF (LOCK) mode, then go to step 17.

17.

EPS control unit check:

EPS control unit check

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

?2.

Disconnect the following connector.

EPS control unit connector B (6P) or B (5P)

?3.	Turn the vehicle to the ON mode, and read the HDS.

Does the HDS identify the vehicle?


	YES

Replace the EPS control unit.?


	NO

Reconnect EPS control unit connector B (6P) or B (5P) with vehicle in OFF (LOCK) mode, then go to step 18.

18.

SRS unit check:

SRS unit check

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

?2.	Do the 12 volt battery terminal disconnection procedure, and wait 3 minutes.

?3.

Disconnect the following connector.

SRS unit connector A (39P)

?4.	Do the 12 volt battery terminal reconnection procedure.

?5.	Turn the vehicle to the ON mode, and read the HDS.

Does the HDS identify the vehicle?


	YES

Replace the SRS unit.?


	NO (without keyless access system)

Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM then recheck. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.?


	NO (with keyless access system)

	Substitute a known-good keyless access control unit, then recheck. If the HDS identifies the vehicle and the keyless access control unit was substituted, replace the original keyless access control unit.?
	Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM then recheck. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.?