DTC B1380: Tailgate Closer Unit Neutral Switch Circuit Malfunction

DTC (Power Tailgate Control Unit)

NOTE:  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 .

• 1. Problem verification:

  1. Clear the DTCs with the HDS.

  2. Open the tailgate with the tailgate outer handle switch.

  3. Close the tailgate manually.

  4. Check for DTCs with the HDS.

  DTC Description	DTC
  B1380 Tailgate Closer Unit Neutral Switch Circuit Malfunction

  Is DTC B1380 indicated?

  YES 

  Go to step 2.

  NO 

  Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power tailgate control unit and the power tailgate closer unit.

• 2. Determine possible failure area (PTG/PTL CLCL line short, others):

  1. Check the parameter(s) below with the HDS.

  Signal	Current conditions
  	Values	Unit
  Latch Gear Position Sw. Neutral

  Is data list value ON?

  YES 

  Go to step 3.

  NO 

  Go to step 5.

• 3. Determine possible failure area (power tailgate closer unit, others):

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

  2. Disconnect the following connector.

  Power tailgate closer unit connector B (6P)

  3. Turn the vehicle to the ON mode.

  4. Check the parameter(s) below with the HDS.

  Signal	Current conditions
  	Values	Unit
  Latch Gear Position Sw. Neutral

  Is data list value ON?

  YES 

  Go to step 4.

  NO 

  Faulty neutral switch; replace the tailgate latch .

• 4. Shorted wire check (PTG/PTL CLCL line):

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

  2. Disconnect the following connector.

  Power tailgate control unit connector A (14P)

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

  Test condition	Vehicle OFF mode Power tailgate closer unit connector B (6P): disconnected Power tailgate control unit connector A (14P): disconnected
  Test point 1	Power tailgate control unit connector A (14P) No. 5
  Test point 2	Body ground

  Is there continuity?

  YES 

  Repair a short to ground in the wire.

  NO 

  Replace the power tailgate control unit .

• 5. Determine possible failure area (power tailgate closer unit, others):

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

  2. Disconnect the following connector.

  Power tailgate closer unit connector B (6P)

  3. Connect terminals A and B with a jumper wire.

  Terminal A	Power tailgate closer unit connector B (6P) No. 2
  Terminal B	Power tailgate closer unit connector B (6P) No. 6

  Courtesy of HONDA, U.S.A., INC.

  4. Turn the vehicle to the ON mode.

  5. Check the parameter(s) below with the HDS.

  Signal	Current conditions
  	Values	Unit
  Latch Gear Position Sw. Neutral

  Is data list value ON?

  YES 

  Faulty neutral switch; replace the tailgate latch .

  NO 

  Go to step 6.

• 6. Determine possible failure area (PTG/PTL CLCL line, PTG/PTL SEG3 line):

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

  2. Disconnect the jumper wire.

  3. Connect terminals A and B with a jumper wire.

  Terminal A	Power tailgate closer unit connector B (6P) No. 2
  Terminal B	Body ground

  Courtesy of HONDA, U.S.A., INC.

  4. Turn the vehicle to the ON mode.

  5. Check the parameter(s) below with the HDS.

  Signal	Current conditions
  	Values	Unit
  Latch Gear Position Sw. Neutral

  Is data list value ON?

  YES 

  Go to step 7.

  NO 

  Go to step 8.

• 7. Open wire check (PTG/PTL SEG3 line):

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

  2. Disconnect the jumper wire.

  3. Disconnect the following connector.

  Power tailgate control unit connector A (14P)

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

  Test condition	Vehicle OFF mode Power tailgate closer unit connector B (6P): disconnected Power tailgate control unit connector A (14P): disconnected
  Test point 1	Power tailgate control unit connector A (14P) No. 11
  Test point 2	Power tailgate closer unit connector B (6P) No. 6

  Courtesy of HONDA, U.S.A., INC.

  Is there continuity?

  YES 

  Replace the power tailgate control unit .

  NO 

  Repair an open or high resistance in the wire.

• 8. Open wire check (PTG/PTL CLCL line):

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

  2. Disconnect the jumper wire.

  3. Disconnect the following connector.

  Power tailgate control unit connector A (14P)

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

  Test condition	Vehicle OFF (LOCK) mode Power tailgate closer unit connector B (6P): disconnected Power tailgate control unit connector A (14P): disconnected
  Test point 1	Power tailgate control unit connector A (14P) No. 5
  Test point 2	Power tailgate closer unit connector B (6P) No. 2

  Courtesy of HONDA, U.S.A., INC.

  Is there continuity?

  YES 

  Replace the power tailgate control unit .

  NO 

  Repair an open or high resistance in the wire.