relay FORD MUSTANG 2003 Workshop Manual

Page 66 of 4378

components as necessary.
z Broken
powertrain
mounts. z
INSPECT the powertrain
mounts. INSTALL new
mounts as necessary.
REFER to Section 303 - 01A
for 3.8L engines or
Section 303 - 01B for 4.6L (2V)
engines.
z Idle speed too
high. z
CHECK for the correct idle
speed.
z Driveline clunk—
occurs as the vehicle
starts to move
forward following a
stop z
Worn or galled
driveshaft slip-
yoke splines. z
CLEAN and INSPECT the
splines of the yoke for a
worn or galled condition.
INSTALL a new yoke as
necessary. REFER to
Section 205 - 01 .
z Worn or galled
driveshaft and
coupling shaft
splines. z
CLEAN and INSPECT the
splines of the driveshaft and
coupling shaft for a worn or
galled condition. INSTALL a
new driveshaft assembly as
necessary. REFER to
Section 205 - 01 .
z Loose rear leaf
spring U- bolts. z
CHECK the U- bolts for
loose nuts. TIGHTEN to
specification. REFER to
Section 204 - 02 .
z Driveline clunk (FWD
vehicles)—occurs
during acceleration or
from cruise to
coast/deceleration z
Damaged or
worn inboard
constant velocity
(CV) joint. z
INSPECT the inboard CV
joint and boot. REPAIR or
INSTALL a new CV joint as
necessary.
z Driveline clunk (4WD
vehicles)—occurs
during shift- on-the- fly
engagement z
Clutch relay.
z Shift motor.
z Transfer case.
z GEM. z
CHECK the 4WD
engagement system.
REPAIR or INSTALL new
components as necessary.
z Clicking, popping or
grinding— occurs
while vehicle is
turning z
Inadequate or
contaminated
lubrication in the
(CV) joints. z
CHECK the CV boots and
joints for wear or damage.
REPAIR or INSTALL new
components as necessary.
z Another
component
contacting the
halfshaft. z
CHECK the halfshafts and
the area around the
halfshafts. REPAIR as
necessary.
z Brake
components. z
INSPECT the front brakes
for wear or damage.
REPAIR as necessary.
REFER to Section 206 - 03 .
z Steering
components. z
INSPECT the drag link,
inner and outer tie- rods or
idler arm for wear or
damage. REPAIR as
necessary. REFER to
Section 211 - 02 .
z Suspension
components. z
INSPECT the upper and
lower ball joints for wear or
damage. REPAIR as
necessary. REFER to Klj . 19 ba
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Anti-Lock Brake Control Module Parameter Identification (PID) Index B1596 Repair Continuous Codes ABS REPAIR the DTCs retrieved.
C1095 ABS Hydraulic Pump Motor
Circuit Failure ABS Go To Pinpoint Test E .
C1145 RF Anti-
Lock Brake Sensor
Input Circuit Failure ABS Go To Pinpoint Test F .
C1155 LF Anti-
Lock Brake Sensor
Input Circuit Failure ABS Go To Pinpoint Test F .
C1165 RR Anti-
Lock Brake Sensor
Input Circuit Failure ABS Go To Pinpoint Test F .
C1175 LR Anti-
Lock Brake Sensor
Input Circuit Failure ABS Go To Pinpoint Test F .
C1222 Anti-
Lock Brake Sensor
Mismatch ABS Go To Pinpoint Test G .
C1233 LF Anti-
Lock Brake Sensor
Input Signal Missing ABS Go To Pinpoint Test H .
C1234 RF Anti-
Lock Brake Sensor
Input Signal Missing ABS Go To Pinpoint Test H .
C1235 RR Anti-
Lock Brake Sensor
Input Signal Missing ABS Go To Pinpoint Test H .
C1236 LR Anti-
Lock Brake Sensor
Input Signal Missing ABS Go To Pinpoint Test H .
C1266 ABS Valve Power Relay
Circuit Failure ABS Go To Pinpoint Test I .
Anti-Lock Brake Control Module Parameter Identification (PID) Index PID Description Expected Value
CCNTABS Number of Continuous DTCS in
the Anti- Lock Brake Control
Module one count per bit
BOO_ABS Brake Switch Input OFF, ON
PMP_MTR ABS Pump Motor OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG VLV_CTR ABS Valve Control Relay OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG LF_WSPD LF Wheel Speed 0-
255 MPH RF_WSPD RF Wheel Speed 0-
255 MPH LR_WSPD LR Wheel Speed 0-
255 MPH RR_WSPD RR Wheel Speed 0-
255 MPH ABSLF_I LF ABS Inlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG ABSLF_O LF ABS Outlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG Klj . 3 ba
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PINPOINT TEST I: ABS VALVE POWER RELAY CIRCUIT FAILURE z
Have an assistant monitor the anti- lock brake
control module PIDs LF_WSPD, RF_WSPD,
LR_WSPD, and RR_WSPD while driving at
various speeds.
z NOTE: The vehicle must be driven 16 km/h (10
miles) during this test step.
z Test drive the vehicle for 16 kmh (10 miles).
z Are the anti- lock brake control module PIDs
approximately the same at all times? No
INSTALL a new anti-
lock brake
sensor; REFER to Sensor — Front or
Sensor — Rear . CLEAR the DTCs.
REPEAT the self- test. Test Step Result / Action to Take
I1 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
I2 .
No
REPAIR the circuit. CLEAR
the DTCs. REPEAT the self-
test. I2 CHECK CIRCUIT 532 (OG/YE) FOR AN OPEN
z
Key in OFF position.
z Key in ON position.
z Measure the voltage between anti- lock brake control
module C135 Pin 14, Circuit 532 (OG/YE), harness side
and ground.
z Is the voltage less than 5 volts? Yes
REPAIR the open in Circuit
532 (OG/YE). CLEAR the
DTCs. REPEAT the self-test.
No
GO to I3 .
I3 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. Yes
INSTALL a new anti-
lock
brake control module.
REFER to Module in this
section. CLEAR the DTCs.
REPEAT the self- test. Klj . 13 ba
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Anti-Lock Brake Control Module Diagnostic Trouble Code (DTC) Index
DTC Description Source Action
B1318 Battery Voltage Low ABS/TC Go To Pinpoint Test C .
B1342 ECU Is Defective ABS/TC INSTALL a new anti-
lock brake control
module; REFER to Module . REPEAT the
self- test. B1484 Brake Pedal Input Open Circuit ABS/TC Go To Pinpoint Test D .
B1596 Repair Continuous Codes ABS/TC REPAIR the DTCs retrieved.
C1095 ABS Hydraulic Pump Motor Circuit
Failure ABS/TC Go To Pinpoint Test E .
C1145 RF Anti-
Lock Brake Sensor Input
Circuit Failure ABS/TC Go To Pinpoint Test F .
C1155 LF Anti-
Lock Brake Sensor Input
Circuit Failure ABS/TC Go To Pinpoint Test F .
C1165 RR Anti-
Lock Brake Sensor Input
Circuit Failure ABS/TC Go To Pinpoint Test F .
C1175 LR Anti-
Lock Brake Sensor Input
Circuit Failure ABS/TC Go To Pinpoint Test F .
C1222 Anti-
Lock Brake Sensor Mismatch ABS/TC Go To Pinpoint Test G .
C1233 LF Anti-
Lock Brake Sensor Input
Signal Missing ABS/TC Go To Pinpoint Test H .
C1234 RF Anti-
Lock Brake Sensor Input
Signal Missing ABS/TC Go To Pinpoint Test H .
C1235 RR Anti-
Lock Brake Sensor Input
Signal Missing ABS/TC Go To Pinpoint Test H .
C1236 LR Anti-
Lock Brake Sensor Input
Signal Missing ABS/TC Go To Pinpoint Test H .
C1266 ABS Valve Power Relay Circuit
Failure ABS/TC INSTALL a new anti-
lock brake control
module; REFER to Module . REPEAT the
self- test. C1805 Mismatched PCM and/or Anti-Lock
Brake Control Module ABS/TC CLEAR the DTCs. RETRIEVE the DTCs. If
DTC C1805 is retrieved, check the PCM
and Anti- Lock Brake Control Module is for
the correct vehicle. INSTALL a new PCM or
anti-lock brake control module as
necessary. CLEAR the DTCs. REPEAT the self-test. U1009 SCP (J1850) Invalid or Missing Data
for Engine Torque ABS/TC CARRY OUT the PCM self-
test. U1027 SCP (J1850) Invalid or Missing Data
for Engine RPM ABS/TC CARRY OUT the PCM self-
test. U1059 SCP (J1850) Invalid or Missing Data
for Transmission/Transaxle/PRNDL ABS/TC CARRY OUT the PCM self-
test. U1083 SCP (J1850) Invalid or Missing Data
for Engine Systems ABS/TC CARRY OUT the PCM self-
test. U1262 SCP (J1850) Communication Bus
Fault ABS/TC REFER to
Section 418 - 00 . Klj . 3 ba
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Anti-Lock Brake Control Module Parameter Identification (PID) Index
Anti-Lock Brake Control Module Parameter Identification (PID) Index PID Description Expected Value
CCNTABS Number of Continuous DTCS in
the Anti- Lock Brake Control
Module one count per bit
BOO_ABS Brake Switch Input OFF, ON
PMP_MTR ABS Pump Motor OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG VLV_CTR ABS Valve Control Relay OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG LF_WSPD LF Wheel Speed 0-
255 MPH RF_WSPD RF Wheel Speed 0-
255 MPH LR_WSPD LR Wheel Speed 0-
255 MPH RR_WSPD RR Wheel Speed 0-
255 MPH ABSLF_I LF ABS Inlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG ABSLF_O LF ABS Outlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG ABSRF_I RF ABS Inlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG ABSRF_O RF ABS Outlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG ABSLR_I LR ABS Inlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG ABSLR_O LR ABS Outlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG ABSRR_I RR ABS Inlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG ABSRR_O RR ABS Outlet Valve OFF---, OFFO--, OFF
-B-, OFF--G, OFFO- G, OFF-
BG, OFFOBG, ON---, ONO--, ON -B-, ON--G, ONO-
G, ON- BG, ONOBG LF_TC_P LF Traction Control Priming
Valve OFF, ON
RF_TC_P RF Traction Control Priming
Valve OFF, ON
LR_TC_P LR Traction Control Priming
Valve OFF, ON
RR_TC_P RR Traction Control Priming
Valve OFF, ON
LF_TC_S LF Traction Control Switching OFF, ON Klj . 4 ba
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Page 822 of 4378

z
check the connections to the vehicle.
z 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: zCKT914, CKT915 or CKT70 =ALL ECUS NO RESP/NOT EQUIP, refer to Section 418 -
00 .
z NO RESP/NOT EQUIP for GEM, go to Pinpoint Test A.
z SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs),
erase the continuous DTCs and carry out self- test diagnostics for the GEM.
6. If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics.
7. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics.
GEM Diagnostic Trouble Code (DTC) Index GEM Diagnostic Trouble Code (DTC) Index DTC Description Source Action
B1217 Horn Relay Coil Circuit Failure GEM REFER to
Section 413 - 06 .
B1218 Horn Relay Coil Circuit Short to
Vbatt GEM REFER to
Section 413 - 06 .
B1312 Lamp Headlamp Input Circuit
Short to Battery GEM REFER to
Section 417 - 01 .
B1317 Battery Voltage High GEM REFER to
Section 414 - 00 .
B1318 Battery Voltage Low GEM REFER to
Section 414 - 00 .
B1322 Driver Door Ajar Circuit Short to
Ground GEM REFER to
Section 417 - 02 .
B1330 Passenger Door Ajar Circuit
Short to Ground GEM REFER to
Section 417 - 02 .
B1334 Decklid Ajar Rear Door Circuit
Short to Ground GEM REFER to
Section 417 - 02 .
B1339 Chime Input Request Circuit
Short to Battery GEM REFER to
Section 413 - 09 .
B1340 Chime Input Request Circuit
Short to Ground GEM REFER to
Section 413 - 09 .
B1342 ECU Is Defective GEM CLEAR the DTC. Retrieve the DTCs. If DTC
B1342 is retrieved, INSTALL a new GEM. REFER to Section 419 - 10 .
B1353 Ignition Key-
In Circuit Open GEM REFER to
Section 413 - 09 .
B1359 Ignition Run/Acc Circuit Failure GEM GO to
Pinpoint Test E .
B1396 Power Door Lock Circuit Short
to Battery GEM REFER to
Section 501 - 14B .
B1397 Power Door Unlock Circuit
Short to Battery GEM REFER to
Section 501 - 14B . Klj . 2 ba
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B1405 Driver Power Window Down
Circuit Short to Battery GEM REFER to
Section 501 - 11 .
B1408 Driver Power Window Up
Circuit Short to Battery GEM REFER to
Section 501 - 11 .
B1410 Driver Power Window Motor
Circuit Failure GEM REFER to
Section 501 - 11 .
B1426 Lamp Safety Belt Circuit Short
to Battery GEM REFER to
Section 413 - 01 .
B1428 Lamp Safety Belt Circuit Failure GEM REFER to
Section 413 - 01 .
B1431 Wiper Brake/Run Relay Circuit
Failure GEM REFER to
Section 501 - 16 .
B1432 Wiper Brake/Run Relay Circuit
Short to Battery GEM REFER to
Section 501 - 16 .
B1434 Wiper Hi/Low Speed Relay Coil
Circuit Failure GEM REFER to
Section 501 - 16 .
B1436 Wiper Hi/Low Speed Relay Coil
Circuit Short to Battery GEM REFER to
Section 501 - 16 .
B1438 Wiper Mode Select Switch
Circuit Failure GEM REFER to
Section 501 - 16 .
B1441 Wiper Mode Select Switch
Circuit Short to Ground GEM REFER to
Section 501 - 16 .
B1446 Wiper Park Sense Circuit
Failure GEM REFER to
Section 501 - 16 .
B1448 Wiper Park Sense Circuit Short
to Battery GEM REFER to
Section 501 - 16 .
B1450 Wiper Wash/Delay Switch
Circuit Failure GEM REFER to
Section 501 - 16 .
B1453 Wiper Wash/Delay Switch
Circuit Short to Ground GEM REFER to
Section 501 - 16 .
B1458 Wiper Washer Pump Motor
Relay Circuit Failure GEM REFER to
Section 501 - 16 .
B1460 Wiper Washer Pump Motor
Relay Coil Circuit Short to Battery GEM REFER to
Section 501 - 16 .
B1462 Safety Belt Switch Circuit
Failure GEM REFER to
Section 413 - 09 .
B1466 Wiper Hi/Low Speed Not
Switching GEM REFER to
Section 501 - 16 .
B1473 Wiper Low Speed Circuit Motor
Failure GEM REFER to
Section 501 - 16 .
B1476 Wiper High Speed Circuit Motor
Failure GEM REFER to
Section 501 - 16 .
B1551 Decklid Release Circuit Failure GEM REFER to
Section 501 - 14B .
B1553 Decklid Release Circuit Short
to Battery GEM REFER to
Section 501 - 14B .
B1555 Ignition Run/Start Circuit
Failure GEM GO to
Pinpoint Test D .
B1687 Lamp Dome Input Circuit Short
to Battery GEM REFER to
Section 417 - 02 .
B2486 LF Side Repeater Lamp Output GEM REFER to
Section 417 - 01 . Klj . 3 ba
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DESCRIPTION AND OPERATION
Starting System
Starter Motor
The starter motor is a 12-
volt unit that has the starter solenoid mounted on the drive end housing and
functions as follows:
zThe current flows through the solenoid energizing coil until the solenoid plunger is at the end of
its travel.
z The plunger closes a set of contacts that bypass the energizing coil, letting the holding coil keep
the starter drive engaged and passing starting current to the starter motor.
z The motor is energized when the starter solenoid contacts are closed.
z The starter drive engages the flywheel ring gear and starts the engine.
z An overrunning clutch in the starter drive protects the starter motor from excessive speed when
the engine starts.
Starter Relay
The starter interrupt relay consists of:
zpull in coil and contacts
When the ignition switch is in the START position:
zthe pull- in coil is activated and pulls the contacts together.
z current passes through the starter relay from the engine compartment power distribution box to
the starter solenoid.
Clutch Pedal Position (CPP) Switch
The CPP switch for:
za manual transmission closes when the clutch pedal is depressed, completing the starting
circuit.
z an automatic transmission is a jumper inserted in place of the CPP switch to complete the
circuit.
Starter System — Operation
When the ignition switch is turned to the START position the starter relay switches power to the starter
solenoid causing the starter motor to engage as long as:
zthe clutch pedal is depressed (manual transmission only).
z the digital transmission range (TR) sensor is in PARK or NEUTRAL (automatic transmission
only).
SECTION 303-
06: Starting System 2003 Mustang Workshop Manual Klj . 1 ba
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DIAGNOSIS AND TESTING
Starting System
Refer to Wiring Diagrams Cell
20 , Starting System for schematic and connector information.
Inspection and Verification WARNING: When servicing starter motor or carrying out other underhood work in the
vicinity of the starter motor, be aware that the heavy gauge battery input lead at the starter
solenoid is "electrically hot" at all times. A protective cap or boot is provided over this terminal
that must be installed after servicing. Be sure to disconnect the battery negative cable before
servicing the starter. Failure to follow these instructions may result in personal injury.
WARNING: When working in area of the starter motor, be careful to avoid touching hot
exhaust components. Failure to follow these instructions may result in personal injury.
WARNING: When using a remote starter switch or jumper wire, be sure the ignition switch
is in the OFF position and the transmission is in PARK (A/T) or Neutral (M/T) with the parking
brake control fully applied.
1. Verify the customers concern by operating the starting system to duplicate the conditions.
2. Inspect to determine if any of the following mechanical or electrical concerns apply.
3. If the inspection reveals an obvious concern that can be readily identified, repair as necessary.
4. If the concern remains after the inspection, determine the symptom. GO to Symptom Chart .
SECTION 303-
06: Starting System 2003 Mustang Workshop Manual Special Tool(s)
Digital Multimeter
105-
R0051 or equivalent Visual Inspection Chart
Mechanical Electrical
z
Starter motor
z Brackets z
Battery
z Battery junction box (BJB) fuse ignition switch (40A)
z Central junction box (CJB) Fuse 6 (20A)
z Fuse 24 (10A)
z Damaged wiring harness
z Starter Relay
z Loose or corroded connections Klj . 1 ba
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Symptom Chart
Pinpoint Tests
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE
RELAY DOES CLICK
SYMPTOM CHART Condition
Possible Sources Action
z The engine does
not crank and the
relay does click z
Battery.
z Fuse.
z Starter
motor/solenoid.
z Ignition switch.
z Circuit. z
Go To Pinpoint Test A .
z The engine does
not crank and the
relay does not
click z
Fuse.
z Battery.
z Starter relay.
z Ignition switch.
z Digital transmission
range (TR) sensor.
z Starter solenoid.
z Clutch pedal
position (CPP)
switch.
z Circuit. z
Go To Pinpoint Test B .
z The engine
cranks slowly z
Battery.
z Starter
motor/solenoid.
z Circuit. z
Go To Pinpoint Test C .
z Unusual starter
noise z
Starter motor
mounting.
z Starter motor.
z Incorrect starter
drive engagement. z
Go To Pinpoint Test D .
z The starter spins
but the engine
does not crank z
Starter Motor zINSPECT the starter motor
mounting and engagement.
REPAIR as necessary.
z Damaged
flywheel/ring gear
teeth. z
INSPECT the flywheel/ring
gear for damaged, missing or
worn teeth. REPAIR as
necessary. Test Step Result / Action to Take
A1 CHECK THE VOLTAGE TO THE STARTER RELAY
z
Measure the voltage between the starter relay pin 30,
circuit 1050 (LG/VT) and ground. Yes
GO to
A2 .
No
REPAIR circuit 1050 (LG/VT) Klj . 2 ba
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