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

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. 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.

B1 RETRIEVE THE RECORDED SJB DTCS FROM BOTH THE CONTINUOUS AND ON-DEMAND SJB SELF-TESTS
- Check for recorded SJB DTCs from the continuous and on-demand self-tests.
- Is SJB DTC B1352 recorded?
Yes : GO to B4.

No : GO to B2.
B2 CARRY OUT THE INSTRUMENT CLUSTER WARNING LAMPS AND CHIME ACTIVE COMMAND USING THE DIAGNOSTIC TOOL
- Connect the scan tool.
- Key in ON position.
- Enter the following diagnostic mode on the scan tool: Instrument Cluster Active Command Self-Test.
- Select the instrument cluster warning lamps and chime active command. Trigger the chime active command.
- Does the chime sound?
Yes : GO to B3.

No : GO to B6.
B3 CHECK THE INTERIOR LAMPS
- Open the driver door.
- Does the interior lamp illuminate when the driver door is open?
Yes : GO to B4.

No : REFER to INTERIOR LIGHTING to continue diagnosis of the interior lamps.
B4 CHECK CIRCUIT 158 (BK/PK) FOR AN OPEN OR SHORT TO GROUND
- Remove the ignition key from the ignition switch.
- Disconnect: Ignition Switch C250.
- Disconnect: SJB C2280e.
- Measure the resistance between the SJB C2280e-29, circuit 158 (BK/PK), harness side and the ignition switch C250-5, circuit 158 (BK/PK), harness side; and between the SJB C2280e-29, circuit 158 (BK/PK), harness side and ground.
  
  Fig 1: Checking Circuit 158 (BK/PK) For An Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the SJB and the ignition switch, and greater than 10,000 ohms between the SJB and ground?
Yes : GO to B5.

No : REPAIR the circuit. TEST the system for normal operation.
B5 CHECK THE IGNITION SWITCH
- Insert the ignition key into the ignition switch.
- Measure the resistance between the ignition switch C250-5, component side and C250-4, component side; and between the ignition switch C250-5, component side and ground.
  
  Fig 2: Checking Ignition Switch
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the ignition switch pins, and greater than 10,000 ohms between the ignition switch and ground?
Yes : GO to B6.

No : INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
B6 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 INSTRUMENT CLUSTER . 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.