F-CAN Circuit Troubleshooting (Without CAN Gateway)
- 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. 9 Test point 2 PCM connector A (51P) No. 10 Is there about 45-57 Ω ?
YES
Go to step 15.
NO
Go to step 2.
- Shorted wire check (F-CAN_H line to F-CAN_L line):
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 32P connector
- 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)
- Audio-navigation unit connector C (24P) (with navigation)
- Audio unit connector C (24P) (with display audio)
- Multipurpose camera unit 20P connector (with ACC)
- i-VTM control unit 24P connector (AWD)
-2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (51P): disconnected VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 PCM connector A (51P) No. 9 Test point 2 PCM connector A (51P) No. 10 Is there continuity?
YES
Repair a short in the F-CAN_H wire to F-CAN_L wire between PCM terminals A9 and A10.
NO
The F-CAN_H and F-CAN_L wires are not shorted. Go to step 3.
- 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 VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 Gauge control module 32P connector No. 24 Test point 2 PCM connector A (51P) No. 9 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.
- 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 VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 VSA modulator-control unit 38P connector No. 6 Test point 2 PCM connector A (51P) No. 9 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.
- 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 VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 EPS control unit connector B (8P) No. 3 Test point 2 PCM connector A (51P) No. 9 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.
- 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 A (51P): disconnected VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 Engine mount control unit 16P connector No. 13 Test point 2 PCM connector A (51P) No. 9 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.
- 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 A (51P): disconnected VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 Keyless access/TPMS control unit connector C (20P) No. 2 Test point 2 PCM connector A (51P) No. 9 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.
- 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 VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 Gauge control module 32P connector No. 25 Test point 2 PCM connector A (51P) No. 10 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.
- 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 VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 VSA modulator-control unit 38P connector No. 7 Test point 2 PCM connector A (51P) No. 10 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.
- 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 VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 EPS control unit connector B (8P) No. 8 Test point 2 PCM connector A (51P) No. 10 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.
- 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 A (51P): disconnected VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 Engine mount control unit 16P connector No. 15 Test point 2 PCM connector A (51P) No. 10 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.
- 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 A (51P): disconnected VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 Keyless access/TPMS control unit connector C (20P) No. 12 Test point 2 PCM connector A (51P) No. 10 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.
- EPS control unit internal resistance check
-1. Reconnect EPS control unit connector B (8P).
-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: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 PCM connector A (51P) No. 9 Test point 2 PCM connector A (51P) No. 10 Is there about 108-132 Ω ?
YES
The EPS control unit is OK. Go to step 14.
NO
- VSA modulator-control unit internal resistance check
-1. Reconnect the VSA modulator-control unit 38P connector.
-2. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (51P): disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 PCM connector A (51P) No. 9 Test point 2 PCM connector A (51P) No. 10 Is there about 108-132 Ω ?
YES
The VSA modulator-control unit is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM .
NO
- Shorted wire check (F-CAN_H line):
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 32P connector
- 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)
- Audio-navigation unit connector C (24P) (with navigation)
- Audio unit connector C (24P) (with display audio)
- Multipurpose camera unit 20P connector (with ACC)
- i-VTM control unit 24P connector (AWD)
-2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (51P): disconnected VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 PCM connector A (51P) No. 9 Test point 2 Body ground Is there continuity?
YES
Repair a short in the F-CAN_H wire between the PCM (A9) and the VSA modulator-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, the audio-navigation unit, the audio unit, the multipurpose camera unit, the i-VTM control unit, or the DLC.
NO
The F-CAN_H wire is OK. Go to step 16.
- 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 VSA modulator-control unit 38P connector: disconnected Engine mount control unit 16P connector: disconnected Gauge control module 32P connector: disconnected Steering angle sensor 4P connector: disconnected ANC/active sound control unit 20P connector: disconnected EPS control unit connector B (8P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected SRS unit connector A (39P): disconnected Audio-navigation unit connector C (24P) (with navigation): disconnected Audio unit connector C (24P) (with display audio): disconnected Multipurpose camera unit 20P connector (with ACC): disconnected i-VTM control unit 24P connector (AWD): disconnected Test point 1 PCM connector A (51P) No. 10 Test point 2 Body ground Is there continuity?
YES
Repair a short in the F-CAN_L wire between the PCM (A10) and the VSA modulator-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, the audio-navigation unit, the audio unit, the multipurpose camera unit, the i-VTM control unit, or the DLC.
NO
The F-CAN_L wire is OK. Go to step 17.
- 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
Reconnect the gauge control module 32P connector with vehicle in OFF (LOCK) mode, then go to step 18.
- 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 19.
- 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 navigation)
Reconnect the steering angle sensor 4P connector with vehicle in OFF (LOCK) mode, then go to step 21.
NO (with display audio)
Reconnect the steering angle sensor 4P connector with vehicle in OFF (LOCK) mode, then go to step 20.
- 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
NO
Reconnect audio unit connector C (24P) with vehicle in OFF (LOCK) mode, then go to step 22.
- audio-navigation unit check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Audio-navigation 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-navigation unit .
NO
Reconnect audio-navigation unit connector C (24P) with vehicle in OFF (LOCK) mode, then go to step 22.
- EPS control unit check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
EPS control unit connector B (8P) -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 (2WD)
Reconnect EPS control unit connector B (8P) with vehicle in OFF (LOCK) mode, then go to step 24.
NO (AWD)
Reconnect EPS control unit connector B (8P) with vehicle in OFF (LOCK) mode, then go to step 23.
- i-VTM control unit check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
i-VTM 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 i-VTM control unit .
NO
Reconnect i-VTM control unit 24P connector with vehicle in OFF (LOCK) mode, then go to step 24.
- Engine mount control unit check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Engine mount control unit 16P 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 .
NO
Reconnect the engine mount control unit 16P connector with vehicle in OFF (LOCK) mode, then go to step 25.
- ANC/active sound control unit check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
ANC/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 ANC/active sound control unit .
NO (without ACC)
Reconnect the ANC/active sound control unit 20P connector with vehicle in OFF (LOCK) mode, then go to step 27.
NO (with ACC)
Reconnect the ANC/active sound control unit 20P connector with vehicle in OFF (LOCK) mode, then go to step 26.
- Multipurpose camera unit check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Multipurpose camera unit 20P connector -3. Turn the vehicle to the ON mode, and read the HDS.
Does the HDS identify the vehicle?
YES
Replace the multipurpose camera unit .
NO
Reconnect the multipurpose camera unit 20P connector with vehicle in OFF (LOCK) mode, then go to step 27.
- 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
NO
- Substitute a known-good keyless access/TPMS control unit , 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 .
- Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM .