Ford 2003 Mustang Workshop Manual page 3565

H2 OBTAIN A NEW ENCODED
IGNITION KEY
Key in OFF position.
Cut a new encoded ignition key.
Key in ON position.
Program a new encoded ignition
key; for additional information, refer
to Key Programming—Erase All Key
Codes and Program Two Keys
Enter the following diagnostic mode
on the diagnostic tool: Instrument
Cluster On-Demand Self-Test.
Is DTC B1602 retrieved?
H3 INSTALL A NEW PATS
TRANSCEIVER
Key in OFF position.
Install a new PATS transceiver; for
additional information, refer to
Module—Passive Anti-Theft
Transceiver .
Key in ON position.
Enter the following diagnostic mode
on the diagnostic tool: Instrument
Cluster On-Demand Self-Test.
Are any DTCs retrieved?
PINPOINT TEST I: THE ANTI-THEFT SYSTEM DOES NOT OPERATE
CORRECTLY — PATS TRANSCEIVER SIGNAL IS NOT RECEIVED
(NOT CONNECTED, DAMAGED, OR WIRING)
I1 USE THE DTCS FROM THE INSTRUMENT CLUSTER
SELF TESTS
Use the recorded results from the Instrument Cluster
Continuous and On-Demand Self-Tests.
Is DTC B1681 retrieved?
I2 CHECK THE PATS TRANSCEIVER FOR VOLTAGE —
CIRCUIT 20 (WH/LB)
Key in OFF position.
Disconnect: PATS Transceiver C252.
Key in ON position.
Measure the voltage between PATS transceiver C252
Pin 2, Circuit 20 (WH/LB), harness side and ground.
Yes
GO to
No
System is OK. If the customer has any remaining
encoded keys at home, instruct them to carry out
Key Programming—Program a Key Using Two
.
Programmed Keys
procedure is detailed in the Owners Guide.
Yes
REFER to Instrument Cluster Diagnostic Trouble
Code (DTC) Index.
No
System is OK.
Test Step
H3 .
on each remaining key. This
Result / Action to Take
Yes
GO to I2 .
No
System is OK.
Yes
GO to I3 .
No
REPAIR Circuit 20 (WH/LB).
REPEAT the self-test. CLEAR
the DTCs.