DTC U0230: Gauge Control Module Lost Communication With PTG

DTC (Gauge Control Module)

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC ChecksBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not CommunicatingBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFFBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
• If you have any loss of communication DTCs for the PCM, troubleshoot those DTCs first.

• 1. Problem verification:

  1. Clear the DTCs with the HDS.

  2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

  3. Wait for at least 6 seconds.

  4. Check for DTCs with the HDS.

  DTC Description	DTC
  U0230 Gauge control module lost communication with PTG

  Is DTC U0230 indicated?

  YES 

  Go to step 2.

  NO 

  Intermittent failure, the system is OK at this time. Check for loose or poor connections.

• 2. Determine possible failure area (gauge control module power and ground, B-CAN line):

  1. Select B-CAN CONTROL UNITS INFORMATION from the BODY ELECTRICAL SYSTEM SELECT menu, and then select CHECK CONNECTED CONTROL UNITS.

  2. Check the DETECT/NOT AVAILABLE information of the GAUGE CONTROL MODULE.

  Is DETECT indicated?

  YES 

  Go to step 8.

  NO 

  Go to step 3.

• 3. Fuse check:

  1. Check the following fuse.

  Fuse	No. B5 (10 A)
  Location	Under-dash fuse/relay box

  Is the fuse OK?

  YES 

  Go to step 4.

  NO 

  Replace the fuse. If the fuse blows again, repair a short to ground in the No. B5 (10 A) fuse circuit.

• 4. Open wire check (+B BACK UP line):

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

  2. Disconnect the following connector.

  Power tailgate control unit connector B (20P)

  3. Measure the voltage between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode Power tailgate control unit connector B (20P): disconnected
  Test point 1	Power tailgate control unit connector B (20P) No. 20
  Test point 2	Body ground

  Is there battery voltage?

  YES 

  The +B BACK UP wire is OK. Go to step 5.

  NO 

  Repair an open or high resistance in the wire.

• 5. Open wire check (IG1 METER line):

  1. Disconnect the following connector.

  Power tailgate control unit connector A (14P)

  2. Turn the vehicle to the ON mode.

  3. Measure the voltage between test points 1 and 2.

  Test condition	Vehicle ON mode Power tailgate control unit connector A (14P): disconnected Power tailgate control unit connector B (20P): disconnected
  Test point 1	Power tailgate control unit connector A (14P) No. 8
  Test point 2	Body ground

  Is there battery voltage?

  YES 

  The IG1 METER wire is OK. Go to step 6.

  NO 

  Repair an open or high resistance in the wire.

• 6. Open wire check (GND lines):

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

  2. Disconnect the following connector.

  Power tailgate control unit connector C (5P)

  3. Check for continuity between test points 1 and 2 individually.

  Test condition	Vehicle OFF (LOCK) mode Power tailgate control unit connector A (14P): disconnected Power tailgate control unit connector B (20P): disconnected Power tailgate control unit connector C (5P): disconnected
  Test point 1	Power tailgate control unit connector B (20P) No. 12
  Test point 2	Body ground

  Test point 1	Power tailgate control unit connector C (5P) No. 2
  Test point 2	Body ground

  Test point 1	Power tailgate control unit connector C (5P) No. 4
  Test point 2	Body ground

  Is there continuity?

  YES 

  The GND wires are OK. Go to step 7.

  NO 

  Repair an open or high resistance in the ground wire or poor ground (G605).

• 7. Open wire check (B-CAN lines):

  1. Disconnect the following connector.

  Gauge control module connector A (32P)

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

  Test condition	Vehicle OFF (LOCK) mode Power tailgate control unit connector A (14P): disconnected Power tailgate control unit connector B (20P): disconnected Power tailgate control unit connector C (5P): disconnected Gauge control module connector A (32P): disconnected
  Test point 1	Gauge control module connector A (32P) No. 30
  Test point 2	Power tailgate control unit connector A (14P) No. 1

  Is there continuity?

  YES 

  An open or poor connection in the B-CAN_L wire between the power tailgate control unit and the gauge control module.

  NO 

  An open or poor connection in the B-CAN_H wire between the power tailgate control unit and the gauge control module.

• 8. Open wire check (B-CAN lines):

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

  2. Disconnect the following connector.

  Gauge control module connector A (32P) Power tailgate control unit connector A (14P)

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

  Test condition	Vehicle OFF (LOCK) mode Gauge control module connector A (32P): disconnected Power tailgate control unit connector A (14P): disconnected
  Test point 1	Gauge control module connector A (32P) No. 30
  Test point 2	Power tailgate control unit connector A (14P) No. 1

  Is there continuity?

  YES 

  An open or poor connection in the B-CAN_L wire between the power tailgate control unit and the gauge control module.

  NO 

  An open or poor connection in the B-CAN_H wire between the power tailgate control unit and the gauge control module.