F-CAN CIRCUIT TROUBLESHOOTING (2019 2020: 6-Speed A/T)

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

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

SCS Short

- 3. Disconnect the following connector.

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

Is there about 47 - 58 Ω?

YES 

Go to step 15.

NO 

Go to step 2.

-1. Disconnect the following connectors.

NOTE:  Before disconnecting the SRS unit connector, do the 12 Volt Battery Terminal Disconnection procedure, and wait for at least 3 minutes.

• VSA modulator-control unit 38P connector
• Engine mount control unit 16P connector
• Gauge control module connector A (32P)
• Steering angle sensor 4P connector
• ANC/active sound control unit 20P connector
• EPS control unit connector B (8P)
• Keyless access/TPMS control unit connector C (20P)
• SRS unit connector A (39P)

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

Is there continuity?

YES 

Repair a short in the F-CAN_H wire to the F-CAN_L wire between PCM terminals A9 and A10.

NO 

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

-1. Check for continuity between test points 1 and 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 (A9) and the gauge control module.

-1. Check for continuity between test points 1 and 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 (A9) and the VSA modulator-control unit.

-1. Check for continuity between test points 1 and 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 (A9) and the EPS control unit.

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

Is there continuity?

YES 

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

NO 

Repair an open in the F-CAN_H wire between the PCM (A9) and the engine mount control unit.

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

Is there continuity?

YES 

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

NO 

Repair an open in the F-CAN_H wire between the PCM (A9) and the keyless access/TPMS control unit.

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

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 (A10) and the gauge control module.

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

Is there continuity?

YES 

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

NO 

Repair an open in the F-CAN_L wire between the PCM (A10) and the VSA modulator-control unit.

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

Is there continuity?

YES 

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

NO 

Repair an open in the F-CAN_L wire between the PCM (A10) and the EPS control unit.

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

Is there continuity?

YES 

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

NO 

Repair an open in the F-CAN_L wire between the PCM (A10) and the engine mount control unit.

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

Is there continuity?

YES 

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

NO 

Repair an open in the F-CAN_L wire between the PCM (A10) and the keyless access/TPMS control unit.

-1. Reconnect EPS control unit connector B (8P).

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

Is there about 108 - 132 Ω?

YES 

The EPS motor/control unit is OK. Disconnect EPS control unit connector B (8P), then go to step 14.

NO 

Replace the EPS Motor/Control Unit - Removal and Installation .

-1. Reconnect the VSA modulator-control unit 38P connector.

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

Is there about 108 - 132 Ω?

YES 

The VSA modulator-control unit is OK. Disconnect the VSA modulator-control unit 38P connector, then go to step 15.

NO 

Replace the VSA Modulator-Control Unit - Removal and Installation .

-1. Disconnect the following connectors.

NOTE:  Before disconnecting the SRS unit connector, do the 12 Volt Battery Terminal Disconnection procedure, and wait for at least 3 minutes.

• VSA modulator-control unit 38P connector
• Engine mount control unit 16P connector
• Gauge control module connector A (32P)
• Steering angle sensor 4P connector
• ANC/active sound control unit 20P connector
• EPS control unit connector B (8P)
• Keyless access/TPMS control unit connector C (20P)
• SRS unit connector A (39P)

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

Is there continuity?

YES 

Repair a short in the F-CAN_H wire between the PCM (A9) and the VSA modulator-control unit, the engine mount control unit, the gauge control module, the steering angle sensor, the ANC/active sound control unit, the EPS control unit, the keyless access/TPMS control unit, the SRS unit, or the DLC.

NO 

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

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

Is there continuity?

YES 

Repair a short in the F-CAN_L wire between the PCM (A10) and the VSA modulator-control unit, the engine mount control unit, the gauge control module, the steering angle sensor, the ANC/active sound control unit, the EPS control unit, the keyless access/TPMS control unit, the SRS unit, or the DLC.

NO 

The F-CAN_L wire is OK. Go to step 17.

-1. Reconnect all connectors.

- 2. Connect the HDS to the DLC. How to Connect the HDS

- 3. Disconnect the following 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 - Removal and Installation .

NO 

Reconnect the gauge control module connector A (32P) with vehicle in OFF (LOCK) mode, then go to step 18.

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

- 2. Disconnect the following 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 - Removal and Installation .

NO 

Reconnect the VSA modulator-control unit 38P connector with vehicle in OFF (LOCK) mode, then go to step 19.

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

- 2. Disconnect the following 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 - Removal and Installation .

NO 

Reconnect the steering angle sensor 4P connector with vehicle in OFF (LOCK) mode, then go to step 20.

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

- 2. Disconnect the following connector.

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

Does the HDS identify the vehicle?

YES 

Replace the EPS Motor/Control Unit - Removal and Installation .

NO 

Reconnect EPS control unit connector B (8P) with vehicle in OFF (LOCK) mode, then go to step 21.

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

- 2. Disconnect the following connector.

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

Does the HDS identify the vehicle?

YES 

Replace the Engine Mount Control Unit - Removal and Installation .

NO 

Reconnect the engine mount control unit 16P connector with vehicle in OFF (LOCK) mode, then go to step 22.

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

- 2. Disconnect the following connector.

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

Does the HDS identify the vehicle?

YES 

Replace the ANC/Active Sound Control Unit - Removal and Installation .

NO 

Reconnect the ANC/active sound control unit 20P connector with vehicle in OFF (LOCK) mode, then go to step 23.

-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.

- 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 - Go to: SRS Unit Removal and Installation (2017 2018 2019 2020 2021) .

NO 

• Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good Keyless Access/TPMS Control Unit - Removal and Installation , then recheck.

  If the HDS identifies the vehicle and the keyless access/TPMS control unit was substituted, replace the original Keyless Access/TPMS Control Unit - Removal and Installation .

• Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM (6-Speed A/T), ('16-'18 9-Speed A/T) - Removal and Installation then recheck.

  If the HDS identifies the vehicle and the PCM was substituted, replace the original PCM (6-Speed A/T), ('16-'18 9-Speed A/T) - Removal and Installation