2003 FORD MUSTANG ignition

z
Measure the resistance between GEM C201e pin 22, circuit
1002 (BK/PK), harness side and CJB Fuse 32 (15A), pin 2,
circuit 1002 (BK/PK), harness side.
z Is the resistance less than 5 ohms? Yes
GO to
B8 .
No
REPAIR the circuit.
REPEAT the self- test.
CLEAR the DTCs. B8 CHECK GEM INPUT CIRCUIT FOR OPEN —
KEY-IN-
IGNITION SWITCH CIRCUIT 158 (BK/PK) z
Measure the resistance between GEM C201e pin 9, circuit
158 (BK/PK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
B9 .
No
REPAIR circuit 158
(BK/PK) and key-in-
ignition switch for failure.
REFER to Switch — Key -
In - Ignition Warning .
REPEAT the self- test.
CLEAR the DTCs. B9 CHECK GEM VOLTAGE INPUT CIRCUITS FOR SHORT TO
POWER — IGNITION SWITCH CIRCUITS 911 (WH/LG), AND 1002
(BK/PK) z
Key in OFF position.
z Disconnect: CJB Fuse 28 (15A).
z Disconnect: CJB Fuse 32 (15A).
z Disconnect: GEM C201e.
z Remove the ignition key. Measure the voltage between GEM
C201e pin 8, circuit 911 (WH/LG), harness side and ground,
and between GEM C201e pin 22, circuit 1002 (BK/PK),
harness side and ground.
z Are the voltages greater than 10 volts? Yes
REPAIR the circuit in
question. REPEAT the
self-
test. CLEAR the
DTCs.
No
GO to B10 .
B10 CHECK GEM INPUT CIRCUIT FOR SHORT TO GROUND
—-
KEY- IN-IGNITION SWITCH CIRCUIT 158 (BK/PK) z
Disconnect: GEM C201e.
z Remove the ignition key. Measure the resistance between
GEM C201e pin 9, circuit 158 (BK/PK), harness side and Yes
GO to
B11 . Klj . 8 ba
202003 Mustang Workshop Manual
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PINPOINT TEST C: A CHIME DOES NOT OPERATE CORRECTLY—
AIR BAG ground.
z Is the resistance greater than 10,000 ohms? No
REPAIR the circuit.
REPEAT the self-
test.
CLEAR the DTCs. B11 CHECK FOR CORRECT MODULE OPERATION
z
Check:
zfor corrosion
z for pushed- out pins
z connector seated correctly
z Connect any disconnected connectors.
z Make sure all other system connectors are fully seated.
z Operate the system and verify the concern is still present.
z Is the concern still present? Yes
INSTALL a new GEM.
REFER to
Section 419 -
10 . CLEAR the DTCs.
REPEAT the GEM 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. Test Step Result / Action to Take
C1 CHECK CONTINUOUS DTCS AND RESTRAINT CONTROL
MODULE (RCM) z
Connect the diagnostic tool.
z Enter the following diagnostic mode on the diagnostic tool:
RCM On- Demand Self- Test.
z Carry out Continuous DTCs and On Demand RCM Self-
Tests.
z Are any RCM DTCs received? Yes
REFER to
Section 501 - 20B .
No
GO to C2 .
C2 CHECK IGNITION STATES
z
Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PIDS IGN_KEY, IGN_A, IGN_S, and
IGN_R while cycling the ignition switch through the OFF,
ACC, RUN, START and key out positions.
z Do the PID values agree with the ignition switch
states? Yes
GO to
C3 .
No
Go To Pinpoint Test B .
C3 CHECK GEM INTERNAL TONE OPERATION
z
Enter the following diagnostic mode on the diagnostic tool:
GEM Active Command.
z Trigger the GEM active command CHIME ON and OFF.
z Does the chime operate correctly? Yes
GO to
C4 .
No Klj . 9 ba
202003 Mustang Workshop Manual
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PINPOINT TEST D: THE DOOR AJAR CHIME DOES NOT OPERATE
CORRECTLY z
Is the resistance less than 5 ohms? C8 CHECK FOR CORRECT MODULE OPERATION
z
Check:
zfor corrosion
z for pushed- out pins
z connector seated correctly
z Connect any disconnected connectors.
z Make sure all other system connectors are fully seated.
z Operate the system and verify the concern is still present.
z Is the concern still present? Yes
INSTALL a new GEM.
REFER to
Section 419 - 10 .
CLEAR the DTCs. REPEAT
the GEM 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. Test Step Result / Action to Take
D1 CHECK IGNITION STATES
z
Connect the diagnostic tool.
z Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PIDS IGN_KEY, IGN_A, IGN_S, and
IGN_R while cycling the ignition switch through the OFF,
ACC, RUN, START and key out positions.
z Do the PID values agree with the ignition switch states? Yes
GO to
D2 .
No
GO to Pinpoint Test B .
D2 CHECK GEM INTERNAL TONE OPERATION
z
Enter the following diagnostic mode on the diagnostic tool:
GEM Active Command.
z Trigger the GEM active command CHIME ON and OFF.
z Does the chime operate correctly? Yes
GO to
D3 .
No
GO to D17 .
D3 CHECK GEM INPUT —
DRIVER DOOR AJAR CIRCUIT z
Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PID D_DR_SW while opening and closing
the driver door.
z Do the GEM PID D_DR_SW values indicate CLOSED and
AJAR correctly? Yes
GO to
D4 .
No
GO to D5 .
D4 CHECK GEM INPUT —
PASSENGER DOOR AJAR CIRCUIT Klj . 11 ba
202003 Mustang Workshop Manual
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E2 CHECK IGNITION STATES
z
Connect the diagnostic tool.
z Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PIDS IGN_KEY, IGN_A, IGN_S, and
IGN_R while cycling the ignition switch through the OFF,
ACC, RUN, START and key out positions.
z Do the PID values agree with the ignition switch
states? Yes
GO to
E3 .
No
Go To Pinpoint Test B .
E3 CHECK GEM INTERNAL TONE OPERATION
z
Enter the following diagnostic mode on the diagnostic tool:
GEM Active Command.
z Trigger the GEM active command CHIME ON and OFF.
z Does the chime operate correctly? Yes
GO to
E4 .
No
GO to E9 .
E4 CHECK GEM INPUT FROM DOOR AJAR CIRCUIT
z
Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PID D_DR_SW while opening and closing
the driver door.
z Do the GEM PID D_DR_SW values indicate CLOSED
and AJAR correctly? Yes
GO to
E5 .
No
GO to Pinpoint Test D .
E5 MONITOR EXTERIOR LAMP INPUT FOR CORRECT
STATE z
Key in OFF position.
z Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PID PARK_SW, while triggering the
headlamp switch ON and OFF.
z Do the GEM PID PARK_SW values indicate ON and
OFF correctly? Yes
GO to
E9 .
No
GO to E6 .
E6 CHECK EXTERIOR LAMP INPUT CIRCUIT FOR SHORT
TO POWER — GEM PID PARK_SW z
Key in OFF position.
z Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PID PARK_SW, while opening and
closing the driver door.
z Does the GEM PID PARK_SW value always indicate
ON? Yes
GO to
E8 .
No
GO to E7 .
E7 CHECK CIRCUIT 14 (BN) FOR OPEN
z
Key in OFF position.
z Disconnect: GEM C201c.
z Disconnect: Headlamp Switch C205.
z Measure the resistance between GEM C201c pin 7, circuit
14 (BN), harness side and headlamp switch C205 pin R,
circuit 14 (BN), harness side. Yes
GO to
E9 .
No
REPAIR the circuit. REPEAT
the self- test. CLEAR the
DTCs. Klj . 16 ba
202003 Mustang Workshop Manual
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PINPOINT TEST F: THE SAFETY BELT WARNING CHIME DOES NOT
OPERATE CORRECTLY z
Is the resistance less than 5 ohms? E8 TEST CIRCUIT 14 (BN) FOR SHORT TO BATTERY
z
Key in OFF position.
z Disconnect: GEM C201c.
z Set the headlamp switch in the OFF position. Measure the
voltage between GEM C201c pin 7, circuit 14 (BN),
harness side and ground.
z Is the voltage greater than 10 volts? Yes
REPAIR the circuit. REPEAT
the self-
test. CLEAR the
DTCs.
No
GO to E9 .
E9 CHECK FOR CORRECT MODULE OPERATION
z
Check:
zfor corrosion
z for pushed- out pins
z connector seated correctly
z Connect any disconnected connectors.
z Make sure all other system connectors are fully seated.
z Operate the system and verify the concern is still present.
z Is the concern still present? Yes
INSTALL a new GEM.
REFER to
Section 419 - 10 .
CLEAR the DTCs. REPEAT
the GEM 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. Test Step Result / Action to Take
F1 CHECK IGNITION STATES
NOTE:
Verify the belt minder is activated before
diagnosing.
z Connect the diagnostic tool.
z Enter the following diagnostic mode on the diagnostic tool:
GEM PID. Yes
GO to
F2 .
No
Go To Pinpoint Test B . Klj . 17 ba
202003 Mustang Workshop Manual
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z
Monitor the GEM PIDS IGN_KEY, IGN_A, IGN_S, and
IGN_R while cycling the ignition switch through the OFF,
ACC, RUN, START and key out positions.
z Do the PID values agree with the ignition switch
states? F2 DETERMINE IF THE GEM IS RECEIVING CORRECT
SAFETY BELT SWITCH STATUS z
Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PID D_SBELT while buckling and
unbuckling the driver safety belt.
z Does the GEM PID D_SBELT read OUT and IN
correctly? Yes
GO to
F3 .
No
GO to F5 .
F3 CHECK THE GEM INTERNAL TONE OPERATION
z
Enter the following diagnostic mode on the diagnostic tool:
GEM Active Command.
z Trigger the GEM active command CHIME ON and OFF.
z Does the chime operate correctly? Yes
GO to
F4 .
No
GO to F11 .
F4 CHECK THE SAFETY BELT WARNING LAMP OPERATION
z
Cycle the ignition switch from OFF to RUN while monitoring
the instrument cluster safety belt indicator lamp.
z Does instrument cluster safety belt indicator lamp
illuminate for approximately three seconds? Yes
GO to
F11 .
No
REFER to Section 413 - 01 .
F5 DETERMINE IF CIRCUIT 85 (BN/LB) IS OPEN OR
SHORTED TO GROUND z
Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PID D_SBELT, while buckling and
unbuckling the driver safety belt.
z Does the GEM PID D_SBELT value indicate OUT with
the driver safety belt buckled? Yes
GO to
F6 .
No
GO to F8 .
F6 ISOLATE THE SHORT TO GROUND ON CIRCUIT 85
(BN/LB) z
Disconnect: Safety Belt Switch C323.
z Enter the following diagnostic mode on the diagnostic tool:
GEM PID.
z Monitor the GEM PID D_SBELT.
z Does the GEM PID D_SBELT value indicate IN? Yes
INSTALL a new safety belt
switch. REPEAT the self-
test. CLEAR the DTCs.
No
GO to
F7 .
F7 CHECK CIRCUIT 85 (BN/LB) FOR A SHORT TO GROUND
BETWEEN GEM AND SAFETY BELT SWITCH z
Disconnect: GEM C201d.
z Measure the resistance between GEM C201d pin 8, circuit
85 (BN/LB), harness side and ground. Yes
GO to
F11 .
No
REPAIR the circuit. REPEAT
the self- test. CLEAR the
DTCs. Klj . 18 ba
202003 Mustang Workshop Manual
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GENERAL PROCEDURES
Belt Minder Deactivating/Activating
Preparation
1. Before deactivating/activating the belt minder, set the parking brake.
2. Place the gearshift in P (Park) (automatic transmission) or the neutral position (manual transmission).
3. Place the ignition switch in the OFF position.
4. Close all the vehicle doors.
5. Unbuckle the driver safety belt.
6. Place the parklamps/headlamps switch in the OFF position. (If the vehicle is equipped with Autolamps, this will not affect the procedure.)
Deactivating/Activating 1. Turn the ignition switch to the RUN position. (Do not start the engine.)
2. Wait until the safety belt warning lamp turns off. (approximately one to two minutes)
3. NOTE: Steps 3 through 5 must be completed within 60 seconds or the procedure must be
repeated.
Buckle then unbuckle the safety belt three times, ending with the safety belt unbuckled. This
portion of the procedure can be done before or during belt minder warning activation.
4. Turn the parklamps/headlamps on then off.
5. Buckle then unbuckle the safety belt three times ending with the safety belt unbuckled. After this step the safety belt warning lamp will be illuminated for three seconds.
6. Within seven seconds of the safety belt warning lamp turning off, buckle then unbuckle the safety belt. This will enable the belt minder if disabled or disable the belt minder if enabled.
7. The following sequence of events confirm the belt minder is enabled: zflashing of the safety belt warning belt lamp four times per second for three seconds
z three seconds with the safety belt lamp off
z flashing the safety belt lamp four times per second for three seconds again
8. The safety belt lamp flashing four times per second for three seconds provides confirmation that the belt minder is disabled. 9. After confirmation, the deactivation/activation procedure is complete. SECTION 413-
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REMOVAL AND INSTALLATION
Switch —
Key-In-Ignition Warning
Removal 1. Remove the ignition switch lock cylinder. 1. Insert the ignition key and turn to the RUN position.
2. Insert a punch in the access hole of the steering column and press the release tab while pulling out the ignition switch lock cylinder.
2. Remove the key- in-ignition warning switch.
1. Release the clip.
2. Push the key- in-ignition warning switch off the rear of the ignition switch lock cylinder.
Installation 1. To install, reverse the removal procedure. zVerify ignition switch lock cylinder operation.
SECTION 413-
09: Warning Devices 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...