DTC B1673: Ignition Switch Control Unit (KNOB SW) Circuit Open
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0).
- Insert the built-in key into the ignition switch.
- Turn the ignition switch to ON (II) and to LOCK (0) ten times using the built-in key.
- Check for DTCs with the HDS.
Is DTC B1673 indicated?
YES -Go to step 6.
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- Turn the ignition switch to LOCK (0).
- Disconnect keyless access control unit connector A (31P).
- Disconnect the ignition switch control unit 10P connector.
- Check for continuity between keyless access control unit connector A (31P) terminal No. 4 and ignition switch control unit 10P connector terminal No. 7.Fig 1: Checking Continuity Between Keyless Access Control Unit Connector A (31P) And Ignition Switch Control Unit 10P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Go to step 10.
NO -Repair open in the wire.
- Remove the built-in key from the ignition switch.
- With the ignition knob pushed, check for continuity between ignition switch control unit 10P connector terminals No. 7 and No. 6.Fig 2: Checking Continuity Between Ignition Switch Control Unit 10P Connector Terminals No. 7 And No. 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Replace the keyless access control unit.
NO -Replace the ignition switch control unit.