2003 FORD MUSTANG key battery

3. If the concern remains after the inspection, connect the scan tool to the data link connector
(DLC) located beneath the instrument panel and select the vehicle to be tested from the scan
tool menu. If the scan tool does not communicate with the vehicle: 1. Check that the program card is correctly installed.
2. Check the connections to the vehicle.
3. Check the ignition switch position.
4. If the scan tool still does not communicate with the vehicle, refer to the scan tool Manual.
5. Carry out the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with: 1. CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00.
2. NO RESP/NOT EQUIP for the anti- lock brake control module, Go To Pinpoint Test A .
3. SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self- test diagnostics for the anti-lock brake
control module.
6. If the DTCs retrieved are related to the concern, go to the Anti- Lock Brake Control Module
Diagnostic Trouble Code (DTC) Reference Chart to continue diagnostics.
7. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnostics.
Anti-Lock Brake Control Module Diagnostic Trouble Code (DTC) Index
NOTE: If a wheel speed signal fault or a pump motor fault is detected, the yellow ABS warning
indicator cannot be reset with the key OFF and key ON method. The vehicle must be driven over 12
km/h (8 mph) for the anti- lock brake control module to carry out a re- check of the system before the
yellow ABS warning indicator is turned OFF. Visual Inspection Chart Mechanical Electrical
z
Low brake fluid
z Anti- lock brake sensor
z Anti- lock brake sensor indicator
z Base brake system z
Central junction box (CJB)Fuse:
„15 (10A)
„ 29 (15A)
„ 33 (15A)
„ 35 (15A)
z Battery junction box (BJB) Fuse:
„ABS 1 (50A)
„ ABS 2 (20A)
z Circuitry
z Damaged or corroded connectors
z Yellow ABS warning indicator
z Loose grounds
Anti-Lock Brake Control Module Diagnostic Trouble Code (DTC) Index DTC Description Source Action
B1318 Battery Voltage Low ABS Go To Pinpoint Test C .
B1342 ECU Is Defective ABS INSTALL a new anti-
lock brake control module;
REFER to Module . REPEAT the self-
test. B1484 Brake Pedal Input Open Circuit ABS Go To Pinpoint Test D . Klj . 2 ba
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PINPOINT TEST B: UNABLE TO ENTER SELF-
TEST
PINPOINT TEST C: DTC B1318, BATTERY VOLTAGE LOW Test Step Result / Action to Take
B1 CHECK THE COMMUNICATIONS TO THE
ANTI- LOCK BRAKE CONTROL MODULE z
Check the communications to the anti- lock
brake control module.
z Does the scan tool communicate with the
anti-lock brake control module? Yes
INSTALL a new anti-
lock brake control
module; REFER to Module . REPEAT the
self- test.
No
Go To Pinpoint Test A .
Test Step Result / Action to
Take C1 CHECK BATTERY VOLTAGE
z
Measure the battery voltage between the positive and negative
battery posts with the key ON engine OFF (KOEO), and with the
engine running.
z Is the battery voltage between 10 and 13 volts with KOEO, and
between 11 and 17 volts with the engine running? Yes
GO to
C2 .
No
REFER to Section 414 - 00 .
C2 CHECK THE VOLTAGE TO THE ANTI-
LOCK BRAKE CONTROL
MODULE z
Key in OFF position.
z Disconnect: Anti- Lock Brake Control Module C135.
z Key in ON position.
z Measure the voltage between anti- lock brake control module C135
Pin 8, Circuit 601 (LB/PK), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
C3 .
No
REPAIR the circuit.
CLEAR the DTCs.
REPEAT the self-
test. C3 CHECK THE ANTI-
LOCK BRAKE CONTROL MODULE GROUNDS Klj . 6 ba
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E1 CHECK THE PUMP MOTOR FOR CONTINUOUS OPERATION
z
Check the pump motor for continuous operation.
z Is the pump motor running continuously? Yes
INSTALL a new
anti-
lock brake
control module;
REFER to Module .
REPEAT the self-
test.
No
GO to E2 .
E2 CHECK CIRCUIT 534 (YE/LG) FOR AN OPEN
z
Key in OFF position.
z Disconnect: Anti- Lock Brake Control Module C135.
z Measure the voltage between anti- lock brake control module C135
Pin 13, Circuit 534 (YE/LG), harness side, and ground.
z Is the voltage greater than 10 volts? Yes
GO to
E3 .
No
REPAIR the circuit.
CLEAR the DTCs.
REPEAT the self-
test. E3 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
z
Measure the resistance between anti- lock brake control module
C135 Pin 12, Circuit 1205 (BK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
E4 .
No
REPAIR the circuit.
CLEAR the DTCs.
REPEAT the self-
test. E4 CHECK THE PUMP MOTOR FOR OPERATION
z
Disconnect: Pump Motor Connector.
z Connect a 30A fused heavy jumper wire between the positive battery
post and pump motor connector Pin 1 (component side); and
momentarily connect a heavy jumper between negative battery post
and pump motor connector Pin 2 (component side). Yes
INSTALL a new
anti-
lock brake
control module;
REFER to Module .
REPEAT the self-
test.
No
INSTALL a new
HCU; REFER to
Hydraulic Control Unit . CLEAR the
DTCs. REPEAT Klj . 8 ba
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Inspection and Verification
1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan
tool menu. If the scan tool does not communicate with the vehicle: 1. Check that the program card is correctly installed.
2. Check the connections to the vehicle.
3. Check the ignition switch position.
4. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
5. Carry out the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with: 1. CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00.
2. NO RESP/NOT EQUIP for the anti- lock brake control module, Go To Pinpoint Test A .
3. SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs),
erase the continuous DTCs and carry out self- test diagnostics for the anti-lock brake
control module.
6. If the DTCs retrieved are related to the concern, go to the Anti- Lock Brake Control Module
Diagnostic Trouble Code (DTC) Index to continue diagnostics.
7. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnostics.
Anti-Lock Brake Control Module Diagnostic Trouble Code (DTC) Index
NOTE: If a wheel speed signal fault or a pump motor fault is detected, the yellow ABS warning
indicator cannot be reset with the key OFF and key ON method. The vehicle must be driven over 12
km/h (8 mph) for the anti- lock brake control module to do a re- check of the system before the yellow
ABS warning indicator is turned OFF. Visual Inspection Chart Mechanical Electrical
z
Low brake fluid
z Anti- lock brake sensor
z Anti- lock brake sensor indicator
z Base brake system
z Wheel bearings z
Central junction box (CJB) Fuse:
„5 (15A)
„ 15 (10A)
„ 29 (15A)
„ 33 (15A)
„ 35 (15A)
z Battery junction box (BJB) Fuse:
„ABS 1 (50A)
„ ABS 2 (20A)
z Circuitry
z Damaged or corroded connectors
z ABS warning indicator
z Loose grounds Klj . 2 ba
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PINPOINT TEST B: UNABLE TO ENTER SELF-
TEST
PINPOINT TEST C: DTC B1318, BATTERY VOLTAGE LOW z
Is the voltage greater than 10 volts? REPEAT the self-
test.
A2 CHECK THE ANTI-
LOCK BRAKE CONTROL MODULE GROUNDS z
Measure the resistance between anti- lock brake control module
C141 Pin 12, Circuit 1205 (BK), harness side and ground; and
between anti- lock brake control module C141 Pin 15, Circuit 397
(BK/WH), harness side and ground.
z Are the resistances less than 5 ohms? Yes
INSTALL a new
anti-
lock brake
control module;
REFER to Module .
REPEAT the self-
test.
No
REPAIR the circuit
in question.
REPEAT the self-
test. Test Step Result / Action to Take
B1 CHECK THE COMMUNICATIONS TO THE
ANTI- LOCK BRAKE CONTROL MODULE z
Check the communications to the anti- lock
brake control module.
z Does the scan tool communicate with the
anti-lock brake control module? Yes
INSTALL a new anti-
lock brake control
module; REFER to Module . REPEAT the
self- test.
No
Go To Pinpoint Test A .
Test Step Result / Action to
Take C1 CHECK BATTERY VOLTAGE
z
Measure the battery voltage between the positive and negative
battery posts with the key ON engine OFF (KOEO), and with the
engine running. Yes
GO to
C2 .
No
REFER to Section Klj . 7 ba
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PINPOINT TEST D: DTC B1484, BRAKE PEDAL INPUT OPEN
CIRCUIT z
Is the battery voltage between 10 and 13 volts with KOEO, and
between 11 and 17 volts with the engine running? 414 - 00 .
C2 CHECK THE VOLTAGE TO THE ANTI-
LOCK BRAKE CONTROL
MODULE z
Key in OFF position.
z Disconnect: Anti- Lock Brake Control Module C141.
z Key in ON position.
z Measure the voltage between anti- lock brake control module C141
Pin 8, Circuit 601 (LB/PK), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
C3 .
No
REPAIR the circuit.
CLEAR the DTCs.
REPEAT the self-
test. C3 CHECK THE ANTI-
LOCK BRAKE CONTROL MODULE GROUNDS z
Measure the resistance between anti- lock brake control module
C141 Pin 12, Circuit 1205 (BK), harness side and ground; and
between anti- lock brake control module C141 Pin 15, Circuit 397
(BK/WH), harness side and ground.
z Are the resistances less than 5 ohms? Yes
INSTALL a new
anti-
lock brake
control module;
REFER to Module .
REPEAT the self-
test.
No
REPAIR the circuit
in question.
CLEAR the DTCs.
REPEAT the self-
test. Test Step Result / Action to Take
D1 CHECK THE STOPLAMPS FOR CORRECT OPERATION Klj . 8 ba
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PINPOINT TEST F: DTC C1145 (RF), C1155 (LF), C1165 (RR), C1175
(LR), ANTI-
LOCK BRAKE SENSOR INPUT CIRCUIT FAILURE z
Is the voltage greater than 10 volts? E3 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
z
Measure the resistance between anti- lock brake control module
C141 Pin 12, Circuit 1205 (BK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
E4 .
No
REPAIR the circuit.
CLEAR the DTCs.
REPEAT the self-
test. E4 CHECK THE PUMP MOTOR FOR OPERATION
z
Disconnect: Pump Motor Connector.
z Connect a 30A fused heavy jumper wire between the positive battery
post and pump motor connector Pin 1 (component side); and
momentarily connect a heavy jumper between negative battery post
and pump motor connector Pin 2 (component side).
z Does the pump motor operate? Yes
INSTALL a new
anti-
lock brake
control module;
REFER to Module .
REPEAT the self-
test.
No
INSTALL a new
HCU; REFER to
Hydraulic Control Unit . CLEAR the
DTCs. REPEAT
the self- test. Test Step Result / Action to Take
F1 CHECK THE SUSPECT ANTI-
LOCK BRAKE
SENSOR CIRCUIT FOR SHORT TO POWER z
Key in OFF position.
z Disconnect: Anti- Lock Brake Control Module C141.
z Key in ON position. Yes
REPAIR the circuit in question.
CLEAR the DTCs. REPEAT the self- Klj . 10 ba
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REMOVAL AND INSTALLATION
Ignition Switch Lock Cylinder —
Functional
Removal and Installation 1. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Remove the ignition switch lock cylinder (11582). 1. Insert the ignition key and turn to the RUN position.
2. Using a 1/8- inch drift, press the ignition switch lock cylinder release pin through the
access hole while pulling out the ignition switch lock cylinder.
3. To install, reverse the removal procedure. zVerify ignition switch lock cylinder operation.
SECTION 211-
04: Steering Column 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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