Article No. 01-6-2 Cont’d.
System Type E only
• B2141: NVM configuration failure. This means
PATS does not have a stored PCM_ID in • B1213: Less than two (2) keys programmed to
memory (PATS PID PCM_ID = not STORED). If the PATS control. Erase continuous codes, cycle
DTC U1147 is also present, it must be fixed first. ignition, then retrieve continuous fault codes
Attempt to fix a U1262 first as well, but it may again. If DTCs B1232, B1600, B1601, B1602, or
not be required to fix this fault prior to the B2141. B1681 are present, they must be serviced first. If
If B2141 is the only DTC, then using Diagnostic B1213 is the only PATS related code stored, then
Card, select: PCM, Active Commands, Keep Alive cycle second PATS key in ignition to program.
Memory Reset. Cancel back to the previous NGS
• B1342: Electronic Control Unit (ECU) defective.
screen. Turn ignition off. Then disconnect the
Memory failure in PCM. Replace PCM.
DLC. Cycle ignition 3 times slowly (3 seconds on,
• B1600: No PATS key read by the PCM. This can
3 seconds off) to re-initialize the system.
be caused by the PATS key, PATS transceiver,
• U1147: This code indicates a communication
circuits between the PATS transceiver/PCM,
issue (Bus+, Bus-) between the PCM and PATS
and/or the PCM.
(VIC/HEC/SCIL). This code CANNOT be caused
• B1601: Unprogrammed PATS key. There is no
by PATS key, PATS transceiver, or the circuits
issue with the PATS key itself, but must be
between PATS transceiver and PATS control.
programmed into the PATS memory (unless
Whenever PATS has U1147 as a stored DTC,
maximum number of keys already programmed).
there should be a “P1260 Theft Detected -
Follow Spare Key Programming Procedure from
Engine Disabled” in the PCM stored codes. Verify
the chart. No parts should need to be replaced
that P1260 is stored in PCM. If not, there is a
for this code.
possible power-up issue of the PCM (i.e., PATS
• B1602: Partial PATS key was read. Verify that
is powering up at key to RUN/START but the
approved PATS key (Ford Rotunda, ILCO,
PCM is not, therefore when PATS tries to
Strattec, HUF, or Valeo) is being used. Large
communicate over Circuits 914 and 915 to the
metal objects, additional PATS keys, or devices
PCM, there is no response); verify power and
to purchase gasoline located on the customer’s
ground circuits to the PCM; verify the tester can
key chain can cause interference. Instruct the
communicate with the PCM.
customer to keep such items from touching the
• U1262: This code indicates a communication
ignition key during engine start. It is not
issue (Bus+, Bus-) between the PATS/HEC/ICM
necessary to remove the objects from the
and some other module. Do not perform PATS
customer’s key chain. Remote starter equipment
diagnostics if a no start is not reported of if theft
can also cause this fault code. Remove any
indicator is not flashing rapidly at ignition RUN
remote starter equipment close to the transceiver
position. If the indicator is flashing, check to make
before conducting further diagnosis. This DTC
sure the PCM is powered up and operating. If it’s
can be caused by the PATS key or PATS
not, continue with PCM diagnostics.
transceiver.
• B2431: The ignition key (used on 2000 LS) was
• B1681: PATS transceiver module signal is not
not programmed. Note that this vehicle has a
received by the PCM. This code can be caused
special ignition key. Replace ignition key, using
by circuits between PATS transceiver and PCM,
the correct style. If the fault persists, replace the
PATS transceiver, or possibly the PCM. Follow
transceiver module.
pinpoint test for troubleshooting. This can also be
caused by using the wrong transceiver part
DTCs Stored in PCM (that are related to PATS)
number. Verify the correct transceiver part
number is being used.
System Types A, B, C, and D only
• B2103: Transceiver module antenna failure.
• P1260: This code will be stored any time the
Replace transceiver module.
PCM disables the vehicle because of the PATS
• B2431: The ignition key was not programmed.
system. Whenever the PCM has a stored P1260,
Reference the ROTUNDA KEY SELECTION
there should be stored DTCs in PATS that
CHART WITH PART NUMBERS elsewhere in this
require troubleshooting.
TSB to verify that you are using the correct key.
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