Pinpoint Test G: The Anti-Theft Indicator Is Always/Never On - No Three Second Anti-Theft Indicator Prove Out: Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

G1 CHECK ANTI-THEFT INDICATOR STATUS
- Observe the anti-theft indicator.
- Is the anti-theft indicator always on?
- Yes : GO to G2.
- No : GO to G4.
G2 CHECK THE PCM FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: PCM C175b.
- Is the anti-theft indicator on?
- Yes : GO to G3.
- No : GO to G7.
G3 CHECK CIRCUIT 1768 (OG/RD) FOR A SHORT TO GROUND
- Measure the resistance between the PCM C175b-37, circuit 1768 (OG/RD), harness side and ground.
  
  Fig 1: Measuring Resistance Between PCM C175B-37, Circuit 1768 (OG/RD), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : GO to G8.
G4 CHECK THE ANTI-THEFT INDICATOR FOR CORRECT OPERATION
- Key in OFF position.
- Disconnect: PCM C175b.
- Connect a fused (5A) jumper wire between the PCM C175b-37, circuit 1768 (OG/RD), harness side and ground.
  
  Fig 2: Connecting Fused (5A) Jumper Wire Between PCM C175B-37, Circuit 1768 (OG/RD), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Does the anti-theft indicator illuminate?
- Yes : GO to G7.
- No : GO to G5.
G5 CHECK THE CIRCUIT 1768 (OG/RD) FOR A SHORT TO VOLTAGE
- Disconnect: Instrument Cluster C220.
- Measure the voltage between the instrument cluster C220-11, circuit 1768 (OG/RD), harness side and ground.
  
  Fig 3: Measuring Voltage Between Instrument Cluster C220-11, Circuit 1768 (OG/RD), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
- No : GO to G6.
G6 CHECK CIRCUIT 1768 (OG/RD) FOR AN OPEN BETWEEN THE PCM AND INSTRUMENT CLUSTER
- Measure the resistance between the PCM C175b-37, circuit 1768 (OG/RD), harness side and the instrument cluster C220-11, circuit 1768 (OG/RD), harness side.
  
  Fig 4: Measuring Resistance Between PCM C175B-37, Circuit 1768 (OG/RD), Harness Side And Instrument Cluster C220-11, Circuit 1768 (OG/RD), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to G8.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
G7 CHECK FOR CORRECT PCM OPERATION
- Disconnect all of the PCM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all of the PCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . REPROGRAM the encoded keys. REFER to KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT . 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.
G8 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect all of the instrument cluster connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all of the instrument cluster connectors and make sure they seat 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 . CLEAR the DTCs. REPEAT the self-test.
- 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.