Push switch / key unlock warning switch malfunction

This dtc is output if the transponder key ecu does not detect that the unlock warning switch is on even when the ignition switch is on. Under normal conditions, the unlock warning switch is on when the ignition switch is on.

1. 1
   Read value of intelligent tester (unlock warning switch)
2. 2
   Connect the intelligent tester (with can vim) to the dlc3.
3. 3
   Turn the ignition switch on with a key that cannot start the engine.
4. 4
   On the intelligent tester, enter the following menus: diagnosis / obd/mobd / immobiliser / data list / key sw. Read the result.

   

2. Inspect unlock warning switch assembly

1. 1
   Remove the unlock warning switch.
2. 2
   Measure the resistance of the switch.

Standard resistance

3. Check wire harness (unlock warning switch - body ground)

1. 1
   Disconnect the e6 switch connector.
2. 2
   Measure the resistance of the wire harness side connector.

Standard resistance

4. Check wire harness (unlock warning switch - transponder key ecu)

1. 1
   Disconnect the e6 switch connector.
2. 2
   Disconnect the e46 ecu connector.
3. 3
   Measure the resistance of the wire harness side connectors.

Standard resistance