Ford 2003 Mustang Workshop Manual page 3331

Does GEM PID D_DR_SW indicate AJAR with jumper
wire installed?
D9 CHECK CIRCUIT 765 (YE/BK) FOR OPEN BETWEEN GEM
AND DRIVER DOOR AJAR SWITCH
Disconnect: GEM C201c.
Measure the resistance between GEM C201c pin 13, circuit
765 (YE/BK), harness side and driver door ajar switch C526
pin 2, circuit 765 (YE/BK), harness side.
Is the resistance less than 5 ohms?
D10 CHECK CIRCUIT 1205 (BK) FOR OPEN BETWEEN
DRIVER DOOR AJAR SWITCH AND GROUND
Disconnect: Driver Door Ajar Switch C526.
Measure the resistance between driver door ajar switch
C526 pin 1, circuit 1205 (BK), harness side and ground.
Is the resistance less than 5 ohms?
D11 ISOLATE OPEN OR SHORT TO GROUND ON CIRCUIT
761 (GN/RD)
Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
Monitor the GEM PID P_DR_SW, while opening and closing
the passenger door.
Does the GEM PID P_DR_SW value indicate AJAR with
the passenger door closed?
D12 ISOLATE SHORT TO GROUND ON CIRCUIT 761 (GN/RD)
Yes
GO to D17 .
No
REPAIR the circuit.
REPEAT the self-test.
CLEAR the DTCs.
Yes
INSTALL a new driver door
ajar switch. REFER to
Section 501-14A . REPEAT
the self-test. CLEAR the
DTCs.
No
REPAIR the circuit.
REPEAT the self-test.
CLEAR the DTCs.
Yes
GO to D12 .
No
GO to D14 .