F-CAN Circuit Troubleshooting (K20C1: Without CAN gateway)

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 No. 2 (58P)

?4.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector No. 2 (58P): disconnected
Test point 1	PCM connector No. 2 (58P) No. 15
Test point 2	PCM connector No. 2 (58P) No. 27

Is there about 84?102 ??


	YES

Go to step 14.


	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 connector A (32P)
	VSA modulator-control unit 46P connector
	EPS control unit connector B (6P)
	Body control module connector B (36P)
	SRS unit connector A (39P)
	Audio unit connector E (16P)
	Adaptive damper control unit 24P connector
	Active sound control unit 20P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	PCM connector No. 2 (58P) No. 15
Test point 2	PCM connector No. 2 (58P) No. 27

Is there 1 M? or more?


	YES

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


	NO

Repair a short in the F-CAN_H wire to the F-CAN_L wire between PCM connector No. 2 terminals No. 15 and No. 27.?

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 No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	Gauge control module connector A (32P) No. 19
Test point 2	PCM connector No. 2 (58P) No. 15

Is there 1.0 ? or less?


	YES

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


	NO

Repair an open in the F-CAN_H wire between PCM connector No. 2 terminal No. 15 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 No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	VSA modulator-control unit 46P connector No. 20
Test point 2	PCM connector No. 2 (58P) No. 15

Is there 1.0 ? or less?


	YES

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


	NO

Repair an open in the F-CAN_H wire between PCM connector No. 2 terminal No. 15 and the VSA modulator-control unit.?

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 No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	EPS control unit connector B (6P) No. 3
Test point 2	PCM connector No. 2 (58P) No. 15

Is there 1.0 ? or less?


	YES

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


	NO

Repair an open in the F-CAN_H wire between PCM connector No. 2 terminal No. 15 and the EPS control unit.?

6.

Open wire check (F-CAN_H line) 4:

Open wire check (F-CAN_H line) 4

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	SRS unit connector A (39P) No. 34
Test point 2	PCM connector No. 2 (58P) No. 15

Is there 1.0 ? or less?


	YES

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


	NO

Repair an open in the F-CAN_H wire between PCM connector No. 2 terminal No. 15 and the SRS unit.?

7.

Open wire check (F-CAN_H line) 5:

Open wire check (F-CAN_H line) 5

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	Body control module connector B (36P) No. 22
Test point 2	PCM connector No. 2 (58P) No. 15

Is there 1.0 ? or less?


	YES

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


	NO

Repair an open in the F-CAN_H wire between PCM connector No. 2 terminal No. 15 and the body control module.?

8.

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 No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	Gauge control module connector A (32P) No. 20
Test point 2	PCM connector No. 2 (58P) No. 27

Is there 1.0 ? or less?


	YES

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


	NO

Repair an open in the F-CAN_L wire between PCM connector No. 2 terminal No. 27 and the gauge control module.?

9.

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 No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	VSA modulator-control unit 46P connector No. 21
Test point 2	PCM connector No. 2 (58P) No. 27

Is there 1.0 ? or less?


	YES

The F-CAN_L wire is not open. Go to step 10.


	NO

Repair an open in the F-CAN_L wire between PCM connector No. 2 terminal No. 27 and the VSA modulator-control unit.?

10.

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 No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	EPS control unit connector B (6P) No. 1
Test point 2	PCM connector No. 2 (58P) No. 27

Is there 1.0 ? or less?


	YES

The F-CAN_L wire is not open. Go to step 11.


	NO

Repair an open in the F-CAN_L wire between PCM connector No. 2 terminal No. 27 and the EPS control unit.?

11.

Open wire check (F-CAN_L line) 4:

Open wire check (F-CAN_L line) 4

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	SRS unit connector A (39P) No. 35
Test point 2	PCM connector No. 2 (58P) No. 27

Is there 1.0 ? or less?


	YES

The F-CAN_L wire is not open. Go to step 12.


	NO

Repair an open in the F-CAN_L wire between PCM connector No. 2 terminal No. 27 and the SRS unit.?

12.

Open wire check (F-CAN_L line) 5:

Open wire check (F-CAN_L line) 5

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	Body control module connector B (36P) No. 23
Test point 2	PCM connector No. 2 (58P) No. 27

Is there 1.0 ? or less?


	YES

The F-CAN_L wire is not open. Go to step 13.


	NO

Repair an open in the F-CAN_L wire between PCM connector No. 2 terminal No. 27 and the body control module.?

13.

VSA modulator-control unit internal resistance check:

VSA modulator-control unit internal resistance check

?1.	Reconnect VSA modulator-control unit 46P connector.

?2.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	PCM connector No. 2 (58P) No. 15
Test point 2	PCM connector No. 2 (58P) No. 27

Is there about 112?136 ??


	YES

Go to step 14.


	NO

Replace the VSA modulator-control unit.?

14.

Shorted wire check (F-CAN_H line):

Shorted wire check (F-CAN_H line)

?1.

Disconnect the following connectors.

	Gauge control module connector A (32P)
	VSA modulator-control unit 46P connector
	EPS control unit connector B (6P)
	Body control module connector B (36P)
	SRS unit connector A (39P)
	Audio unit connector E (16P)
	Adaptive damper control unit 24P connector
	Active sound control unit 20P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	PCM connector No. 2 (58P) No. 15
Test point 2	Body ground

Is there 1 M? or more?


	YES

The F-CAN_H wire is OK. Go to step 15.


	NO

Repair a short in the F-CAN_H wire between PCM connector No. 2 terminal No. 15 and the gauge control module, the VSA modulator-control unit, the EPS control unit, the body control module, the SRS unit, the audio unit, the adaptive damper control unit, the active sound control unit, or the DLC.?

15.

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 No. 2 (58P): disconnected
	Gauge control module connector A (32P): disconnected
	VSA modulator-control unit 46P connector: disconnected
	EPS control unit connector B (6P): disconnected
	Body control module connector B (36P): disconnected
	SRS unit connector A (39P): disconnected
	Audio unit connector E (16P): disconnected
	Adaptive damper control unit 24P connector: disconnected
	Active sound control unit 20P connector: disconnected
Test point 1	PCM connector No. 2 (58P) No. 27
Test point 2	Body ground

Is there 1 M? or more?


	YES

The F-CAN_L wire is OK. Go to step 16.


	NO

Repair a short in the F-CAN_L wire between PCM connector No. 2 terminal No. 27 and the gauge control module, the VSA modulator-control unit, the EPS control unit, the body control module, the SRS unit, the audio unit, the adaptive damper control unit, the active sound control unit, or the DLC.?

16.

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 connector A (32P)

?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

Reconnect gauge control module connector A (32P) with vehicle in OFF (LOCK) mode, then go to step 17.

17.

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 46P 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 46P connector with vehicle in OFF (LOCK) mode, then go to step 18.

18.

Audio unit check:

Audio unit check

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

?2.

Disconnect the following connector.

Audio unit connector E (16P)

?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 the audio unit connector E (16P) with vehicle in OFF (LOCK) mode, then go to step 19.

19.

Active sound control unit check:

Active sound control unit check

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

?2.

Disconnect the following connector.

Active sound control unit 20P connector

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

Does the HDS identify the vehicle?


	YES

Replace the active sound control unit.?


	NO

Reconnect the active sound control unit 20P connector with vehicle in OFF (LOCK) mode, then go to step 20.

20.

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)

?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) with vehicle in OFF (LOCK) mode, then go to step 21.

21.

Adaptive damper control unit check:

Adaptive damper control unit check

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

?2.

Disconnect the following connector.

Adaptive damper control unit 24P connector

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

Does the HDS identify the vehicle?


	YES

Replace the adaptive damper control unit.?


	NO

Reconnect the adaptive damper control unit 24P connector with vehicle in OFF (LOCK) mode, then go to step 22.

22.

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 for at least 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

	Substitute a known-good body control module, then recheck. If the HDS identifies the vehicle and the body control module was substituted, replace the original body control module.?
	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 HDS identifies the vehicle and the PCM was substituted, replace the original PCM.?