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Tim
Tim, Ford Technician
Category: Ford
Satisfied Customers: 3580
Experience:  Ford Senior Master tech, ASE certified
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Ford expedition: CODE B 1600 AND 1602..PATS..SCANNER

Customer Question

CODE B 1600 AND 1602 FOR A 03 FORD EXPEDTION I KNOW ITS A PATS CODE MY SCANNER DOES NOT HAVE TROUBLESHOOTING
Submitted: 8 years ago.
Category: Ford
Expert:  Tim replied 8 years ago.

Hi carguy 149, My name is XXXXX XXXXX I will try and assist you.

 

Both codes pinpoint test say to:

 

1) INSTALL A NEW ENCODED IGNITION KEY

 

2) INSTALL A NEW PATS TRANSCEIVER

 

If those do not fix than replace the PCM

 

 

PINPOINT TEST B: PATS IGNITION KEY TRANSPONDER SIGNAL IS NOT RECEIVED

NOTE: Large metallic objects, electronic devices on the key chain that can be used to purchase gasoline or similar items, or a second key on the same key ring as the PATS ignition key may cause vehicle starting problems and record DTCs under certain conditions. If a fault cannot be identified, examine the customer's key ring for such objects or devices.

If present, inform the customer that they need to keep these objects from touching the PATS ignition key while starting the engine. These objects and devices cannot damage the PATS ignition key, but can cause a momentary concern if they are too close to the key during engine start.

If a concern occurs, turn ignition OFF and restart the engine with all other objects on the key ring held away from the ignition key.

Check to make sure the encoded ignition key used by the customer is a Ford approved encoded ignition key (Rotunda is the only approved encoded ignition key).

 

Test StepResult / Action to Take
B1 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Enter the following diagnostic mode on the scan tool: Clear Continuous PCM DTCs.
  • Ignition OFF.
  • Ignition ON.
  • Enter the following diagnostic mode on the scan tool: Retrieve PCM Continuous DTCs.
  • Is DTC B1600 retrieved?
Yes
GO to B2.

No
If other than PATS PCM DTCs are retrieved. REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual.

If no PATS DTCs are retrieved, the system is OK.
B2 INSTALL A NEW ENCODED IGNITION KEY

    NOTE: Check to make sure the customer and new encoded ignition keys are Ford approved, encoded PATS ignition keys. Unapproved PATS keys do not always operate correctly over different temperature ranges (Rotunda is the only approved encoded ignition key).

  • Cut a new encoded ignition key.
  • Program the new encoded ignition key. Refer to Spare Key Programming in this section.
  • Enter the following diagnostic mode on the scan tool: Clear PCM Continuous DTCs.
  • Ignition OFF.
  • Ignition ON.
  • Enter the following diagnostic mode on the scan tool: Retrieve PCM Continuous DTCs.
  • Is DTC B1600 present?
Yes
GO to B3.

No
If other than PATS PCM DTCs are retrieved, REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.

If no PATS DTCs are retrieved, the system is OK.
B3 INSTALL A NEW PATS TRANSCEIVER

    NOTE: When a new PCM is installed, the encoded ignition keys must be reprogrammed.

  • Ignition OFF.
  • Install a new PATS transceiver. Refer to Passive Anti-Theft System (PATS) Transceiver in this section.
  • Ignition ON.
  • Enter the following diagnostic mode on the scan tool: Clear PCM Continuous DTCs.
  • Ignition OFF.
  • NOTE: Do not use the encoded ignition key that was programmed in Step B2.
  • Turn the ignition to RUN using an existing customer encoded ignition key.
  • Enter the following diagnostic mode on the scan tool: Retrieve PCM Continuous DTCs.
  • Is DTC B1600 retrieved?
Yes
GO to B4.

No
The system is OK.
B4 CHECK FOR CORRECT PCM OPERATION
  • Disconnect all PCM connectors.
  • Check for:
    • corrosion
    • pushed-out pins
  • Connect all 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 Section 303-14.

REPROGRAM the encoded ignition keys. REFER to Key Programming Using Diagnostic Equipment in this section. CLEAR the DTCs. REPEAT the self-test.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
Expert:  Tim replied 8 years ago.

Do you require any further assistance?

 

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