B1026

Factory Manual References

Factory service manual diagnostic procedure for 2009 acura csx

DTC B1026: Front Passenger's Door Lock Switch Signal Error

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch OFF, and then back ON (II).
  3. Operate the front passenger's door lock switch several times.
  4. Check for DTCs with the HDS.

    Is DTC B1026 indicated? 

    YES  -Go to step 5.

    NO  -Intermittent failure. The front passenger's door lock system is OK at this time.

  5. With the front passenger's door lock switch in the neutral position, select KEYLESS from the HDS and enter the DATA LIST.
  6. Check the ON/OFF information of the FRONT PASSENGER'S DOOR LOCK SWITCH (LOCK) and FRONT PASSENGER'S DOOR LOCK SWITCH (UNLOCK) in the DATA LIST.

    Are both information indicators OFF? 

    YES  -Go to step  12.

    NO  -Go to step 7.

  7. Disconnect the front passenger's power window switch 8P connector.
  8. Check the ON/OFF information of the FRONT PASSENGER'S DOOR LOCK SWITCH (LOCK) and FRONT PASSENGER'S DOOR LOCK SWITCH (UNLOCK) in the DATA LIST.

    Are both information indicators OFF? 

    YES  -Faulty door lock switch; replace the front passenger's power window switch.

    NO  -Go to step 9.

  9. Turn the ignition switch OFF.
  10. Disconnect the under-dash fuse/relay box connector T (34P).
  11. Check for continuity between the No. 1 (LOCK) and No. 6 (UNLOCK) terminals of the front passenger's power window switch 8P connector and body ground.
    Fig 1: Checking Continuity Between 1 (LOCK) And 6 (UNLOCK) Terminals Of Front Passenger's Power Window Switch 8P Connector And Body Ground
    G06269266Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the LOCK or UNLOCK wire.

    NO  -Faulty MICU, replace the under-dash fuse/relay box.

  12. Turn the ignition switch OFF.
  13. Disconnect the front passenger's window switch 8P connector.
  14. Disconnect under-dash fuse/relay box connector T (34P).
  15. Check for continuity between the No. 1 (LOCK) and No. 6 (UNLOCK) terminals of the front passenger's power window switch 8P connector.
    Fig 2: Checking Continuity Between 1 (LOCK) And 6 (UNLOCK) Terminals Of Front Passenger's Power Window Switch 8P Connector
    G06269267Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the wire between the LOCK and UNLOCK wires.

    NO  -Substitute a known-good passenger's window master switch, and recheck. If the symptom/indication goes away, replace the original passenger's window switch. If not, the MICU is faulty, replace the under-dash fuse/relay box.

DTC B1026: Front Passenger's Door Lock Switch Signal Error

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch OFF, and then back ON (II).
  3. Operate the front passenger's door lock switch several times.
  4. Check for DTCs with the HDS.

    Is DTC B1026 indicated? 

    YES  -Go to step 5.

    NO  -Intermittent failure. The front passenger's door lock system is OK at this time.

  5. With the front passenger's door lock switch in the neutral position, select KEYLESS from the HDS and enter the DATA LIST.
  6. Check the ON/OFF information of the FRONT PASSENGER'S DOOR LOCK SWITCH (LOCK) and FRONT PASSENGER'S DOOR LOCK SWITCH (UNLOCK) in the DATA LIST.

    Are both information indicators OFF? 

    YES  -Go to step  12.

    NO  -Go to step 7.

  7. Disconnect the front passenger's power window switch 8P connector.
  8. Check the ON/OFF information of the FRONT PASSENGER'S DOOR LOCK SWITCH (LOCK) and FRONT PASSENGER'S DOOR LOCK SWITCH (UNLOCK) in the DATA LIST.

    Are both information indicators OFF? 

    YES  -Faulty door lock switch; replace the front passenger's power window switch.

    NO  -Go to step 9.

  9. Turn the ignition switch OFF.
  10. Disconnect the under-dash fuse/relay box connector T (34P).
  11. Check for continuity between the No. 1 (LOCK) and No. 6 (UNLOCK) terminals of the front passenger's power window switch 8P connector and body ground.
    Fig 1: Checking Continuity Between 1 (LOCK) And 6 (UNLOCK) Terminals Of Front Passenger's Power Window Switch 8P Connector And Body Ground
    G06269266Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the LOCK or UNLOCK wire.

    NO  -Faulty MICU, replace the under-dash fuse/relay box.

  12. Turn the ignition switch OFF.
  13. Disconnect the front passenger's window switch 8P connector.
  14. Disconnect under-dash fuse/relay box connector T (34P).
  15. Check for continuity between the No. 1 (LOCK) and No. 6 (UNLOCK) terminals of the front passenger's power window switch 8P connector.
    Fig 2: Checking Continuity Between 1 (LOCK) And 6 (UNLOCK) Terminals Of Front Passenger's Power Window Switch 8P Connector
    G06269267Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the wire between the LOCK and UNLOCK wires.

    NO  -Substitute a known-good passenger's window master switch, and recheck. If the symptom/indication goes away, replace the original passenger's window switch. If not, the MICU is faulty, replace the under-dash fuse/relay box.

DTC B1026: Front Passenger's Door Lock Switch Signal Error

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch OFF, and then back ON (II).
  3. Operate the front passenger's door lock switch several times.
  4. Check for DTCs with the HDS.

    Is DTC B1026 indicated? 

    YES  -Go to step 5.

    NO  -Intermittent failure. The front passenger's door lock system is OK at this time.

  5. With the front passenger's door lock switch in the neutral position, select KEYLESS from the HDS and enter the DATA LIST.
  6. Check the ON/OFF information of the FRONT PASSENGER'S DOOR LOCK SWITCH (LOCK) and FRONT PASSENGER'S DOOR LOCK SWITCH (UNLOCK) in the DATA LIST.

    Are both information indicators OFF? 

    YES  -Go to step  12.

    NO  -Go to step 7.

  7. Disconnect the front passenger's power window switch 8P connector.
  8. Check the ON/OFF information of the FRONT PASSENGER'S DOOR LOCK SWITCH (LOCK) and FRONT PASSENGER'S DOOR LOCK SWITCH (UNLOCK) in the DATA LIST.

    Are both information indicators OFF? 

    YES  -Faulty door lock switch; replace the front passenger's power window switch.

    NO  -Go to step 9.

  9. Turn the ignition switch OFF.
  10. Disconnect the under-dash fuse/relay box connector T (34P).
  11. Check for continuity between the No. 1 (LOCK) and No. 6 (UNLOCK) terminals of the front passenger's power window switch 8P connector and body ground.
    Fig 1: Checking Continuity Between 1 (LOCK) And 6 (UNLOCK) Terminals Of Front Passenger's Power Window Switch 8P Connector And Body Ground
    G06269266Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the LOCK or UNLOCK wire.

    NO  -Faulty MICU, replace the under-dash fuse/relay box.

  12. Turn the ignition switch OFF.
  13. Disconnect the front passenger's window switch 8P connector.
  14. Disconnect under-dash fuse/relay box connector T (34P).
  15. Check for continuity between the No. 1 (LOCK) and No. 6 (UNLOCK) terminals of the front passenger's power window switch 8P connector.
    Fig 2: Checking Continuity Between 1 (LOCK) And 6 (UNLOCK) Terminals Of Front Passenger's Power Window Switch 8P Connector
    G06269267Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the wire between the LOCK and UNLOCK wires.

    NO  -Substitute a known-good passenger's window master switch, and recheck. If the symptom/indication goes away, replace the original passenger's window switch. If not, the MICU is faulty, replace the under-dash fuse/relay box.

Supporting Diagrams & Locations

Reference material from the factory manual for this diagnostic procedure.

Diagram

Circuit Diagram

Diagram

Circuit Diagram

Diagram

Circuit Diagram

Diagram

Body Controller Area Network (B-CAN) and Fast Controller Area Network (F-CAN)

Diagram

Circuit Diagram

Diagram

Circuit Diagram

Location

Component Location Index

Location

Component Location Index

Location

Component Location Index

Location

Component Location Index

Fuse/Relay

DTC B1026: Front Passenger's Door Lock Switch Signal Error

Fuse/Relay

DTC B1127: Driver's Door Key Cylinder Switch Signal Error

Fuse/Relay

DTC B1128: Driver's Door Lock Switch Signal Error (LOCK/UNLOCK)

Fuse/Relay

DTC B1129: Driver's Door Lock Knob Switch Signal Error (LOCK/UNLOCK)

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