Pinpoint Test A: The Key-In-Ignition Warning Chime Is Inoperative

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.

A1 CHECK FOR DRIVER DOOR AJAR INPUT TO THE SMART JUNCTION BOX (SJB)
- Check the operation of the interior lamps while opening and closing the driver door.
- Do the interior lamps operate correctly?
Yes: GO to A2.

No: REFER to PINPOINT TEST A: THE INTERIOR LAMPS ARE INOPERATIVE to continue diagnosis of the interior lamps.
A2 CHECK THE INPUT TO THE INSTRUMENT CLUSTER FOR DTC B1352
- Key in OFF position.
- Disconnect: Instrument Cluster C220.
- Insert the ignition key into the ignition lock cylinder.
- Measure the voltage between the instrument cluster C220-7, circuit 3410 (YE), harness side and ground.
  
  Fig 1: Checking Input To Instrument Cluster For DTC B1352
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: GO to A4.

No: GO to A3.
A3 CHECK CIRCUIT 3410 (YE) FOR AN OPEN
- Disconnect: Ignition Switch C250.
- Measure the resistance between the instrument cluster C220-7, circuit 3410 (YE), harness side and the ignition switch C250-5, circuit 3410 (YE), harness side.
  
  Fig 2: Checking Circuit 3410 (YE) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes: INSTALL a new ignition switch. REFER to REMOVAL AND INSTALLATION . CLEAR the DTCs. REPEAT the self-test.

No: REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
A4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect the instrument cluster connector.
- Check for:
  - corrosion
  - pushed-out pins
- Connect the instrument cluster connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes: INSTALL a new instrument cluster. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.

No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.