2003 FORD MUSTANG relay

No
GO to
B10 .
B4 TEST THE GEM CONTROL OF WIPER HIGH/LOW RELAY
z
Trigger the GEM active command WIPER RLY to ON.
z Trigger the GEM active command SPEED RLY ON and
OFF.
z Does wiper speed change on activation and
deactivation of SPEED RLY command? Yes
GO to
B5 .
No
GO to B16 .
B5 DETERMINE IF GEM IS RECEIVING CORRECT WIPER
POSITION STATUS z
Monitor GEM PID WPPRKSW while turning the wipers ON
using the multifunction switch.
z Do the PID values agree with the wiper position? Yes
INSTALL a new GEM. For
additional information,
REFER to
Section 419 - 10 .
CLEAR the DTCs. REPEAT
the self- test.
No
GO to B27 .
B6 TEST THE MULTIFUNCTION SWITCH FOR NORMAL
OPERATION z
Disconnect: Multifunction Switch C202a.
z Check the multifunction switch. Refer to Wiring Diagrams,
Cell 149, Component Testing.
z Is the multifunction switch OK? Yes
GO to
B7 .
No
INSTALL a new multifunction
switch; REFER to Section 211 - 05 . REPEAT the self-
test. CLEAR the DTCs. B7 CHECK CIRCUITS 682 (DB), 684 (PK/YE), AND 680
(LB/OG) FOR SHORT TO BATTERY BETWEEN THE GEM
AND THE MULTIFUNCTION SWITCH z
Disconnect: GEM C201e.
z Key in ON position.
z Using the following table, measure the voltage between
the GEM C201e Pins, harness side and ground.
z Are the voltages greater than 10 volts? Pin Circuit
5 682 (DB)
18 684 (PK/YE)
19 680 (LB/OG) Yes
REPAIR the circuit(s) in
question. REPEAT the self-
test. CLEAR the DTCs.
No
GO to
B8 .
B8 CHECK CIRCUITS 682 (DB), 684 (PK/YE), AND 680 Klj . 8 ba
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(LB/OG) FOR SHORT TO GROUND BETWEEN THE GEM AND
THE MULTIFUNCTION SWITCH
z
Key in OFF position.
z Using the following table, measure the resistance between
the GEM C201e Pins, harness side and ground.
z Are the resistances greater than 10,000 ohms? Pin Circuit
5 682 (DB)
18 684 (PK/YE)
19 680 (LB/OG) Yes
REPAIR the circuit(s) in
question. REPEAT the self-
test. CLEAR the DTCs.
No
GO to
B9 .
B9 CHECK CIRCUITS 682 (DB), 684 (PK/YE), AND 680
(LB/OG) FOR AN OPEN CONDITION BETWEEN GEM AND
MULTIFUNCTION SWITCH z
Using the following table, measure the resistance between
the GEM C201e Pins, harness side and multifunction
switch C202a Pins, harness side.
z Are the resistances less than 5 ohms? GEM Multifunction Switch Circuit
C260 Pin 5 C202a Pin 685 682 (DB)
C260 Pin 18 C202a Pin 590 684 (PK/YE)
C260 Pin 19 C202a Pin 993 680 (LB/OG) Yes
INSTALL a new GEM. For
additional information,
REFER to
Section 419 - 10 .
REPEAT the self- test.
CLEAR the DTCs.
No
REPAIR circuit(s) in question.
REPEAT the self- test.
CLEAR the DTCs. B10 CHECK CIRCUITS 65 (DG) FOR OPEN CIRCUIT
CONDITION BETWEEN BJB AND CJB NOTE:
Verify voltage at CJB F26 (30A) before carrying out
this test.
z Disconnect: Wiper On/Off Relay.
z Measure the voltage between BJB ON and OFF wiper Yes
GO to
B11 .
No Klj . 9 ba
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relay Pin 5, Circuit 65 (DG), harness side and ground; and
between BJB wiper ON/OFF relay Pin 2, Circuit 65 (DG),
harness side and ground.
z Are the voltages greater than 10 volts? REPAIR circuit(s) in question.
REPEAT the self-
test.
CLEAR the DTCs. B11 ISOLATE PROBLEM BETWEEN GEM AND BJB
z
Key in OFF position.
z Connect a fused jumper wire (30A) between wiper
ON/OFF relay Pin 3 and Pin 5, harness side.
z Key in ON position.
z Did the wiper motor activate? Yes
GO to
B12 .
No
GO to B22 .
B12 CARRY OUT THE WIPER ON/OFF RELAY COMPONENT
TEST z
Check the wiper ON and OFF relay; refer to Wiring
Diagrams, Cell 149, Component Testing.
z Is the ON/OFF wiper relay OK? Yes
GO to
B13 .
No
INSTALL a new wiper
ON/OFF relay. REPEAT the
self- test. CLEAR the DTCs. B13 CHECK CIRCUIT 646 (YE/WH) FOR SHORT TO
BATTERY BETWEEN GEM AND BJB z
Disconnect: Wiper On/Off Relay.
z Disconnect: GEM C201d.
z Measure the voltage between GEM C201d 3 Pin 12,
Circuit 646 (YE/WH), harness side and ground. Yes
REPAIR Circuit 646
(YE/WH). REPEAT the self-
test. CLEAR the DTCs.
No
GO to
B14 . Klj . 10 ba
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z
Is the voltage greater than 10 volts? B14 CHECK CIRCUIT 646 (YE/WH) FOR SHORT TO
GROUND BETWEEN GEM AND BJB z
Measure the resistance between GEM C201d Pin 12,
Circuit 646 (YE/WH), harness side and ground.
z Is the resistance greater than 10,000 ohms? Yes
GO to
B15 .
No
REPAIR Circuit 646
(YE/WH). REPEAT the self-
test. CLEAR the DTCs. B15 CHECK CIRCUIT 646 (YE/WH) FOR OPEN BETWEEN
GEM AND BJB z
Measure the resistance between GEM C201d Pin 12,
Circuit 646 (YE/WH), harness side and BJB wiper ON/OFF
relay Pin 1, Circuit 646 (YE/WH), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new GEM. For
additional information REFER
to
Section 419 - 10 . REPEAT
the self- test. CLEAR the
DTCs.
No
REPAIR Circuit 646
(YE/WH). REPEAT the self-
test. CLEAR the DTCs. B16 CHECK CIRCUITS 65 (DG) AND 61 (YE/RD) FOR OPEN
CONDITION BETWEEN BJB AND CJB z
Disconnect: Wiper HIGH/LOW Relay.
z Trigger the GEM active command WIPER RLY to ON.
z Measure the voltages between BJB wiper HIGH/LOW
relay Pin 86, Circuit 65 (DG), harness side and ground;
and between BJB wiper HIGH/LOW relay Pin 30, Circuit
61 (YE/RD), harness side and ground.
z Are the voltages greater than 10 volts? Yes
GO to
B17 .
No
REPAIR circuit in question.
REPEAT the self- test.
CLEAR the DTCs. B17 ISOLATE THE PROBLEM BETWEEN THE GEM AND
THE BJB z
Trigger the GEM active command WIPER RLY to ON. Yes Klj . 11 ba
202003 Mustang Workshop Manual
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z
Connect a fused jumper wire (30A) between wiper
HIGH/LOW relay Pin 30, Circuit 61 (YE/RD), harness side
and Pin 87, Circuit 58 (WH), harness side.
z Did the wiper motor speed increase with the jumper
installed and slow down with the jumper removed? GO to
B18 .
No
GO to B26 .
B18 CARRY OUT COMPONENT TEST ON WIPER HIGH/LOW
RELAY z
Check the wiper HIGH/LOW relay; refer to Wiring
Diagrams, Cell 149, Component Testing.
z Is the wiper HIGH/LOW relay OK? Yes
GO to
B19 .
No
INSTALL a new wiper
HIGH/LOW relay. REPEAT
the self- test. CLEAR the
DTCs. B19 CHECK CIRCUIT 647 (GY/LB) FOR SHORT TO
BATTERY BETWEEN GEM AND BJB z
Disconnect: GEM C201d.
z Measure voltage between GEM C201d Pin 5, Circuit 647
(GY/LB), harness side and ground.
z Is the voltage greater than 10 volts? Yes
REPAIR Circuit 647 (GY/LB).
REPEAT the self-
test.
CLEAR the DTCs.
No
GO to B20 .
B20 CHECK CIRCUIT 647 (GY/LB) FOR SHORT TO GROUND
BETWEEN GEM AND BJB z
Measure the resistance between GEM C201d Pin 5,
Circuit 647 (GY/LB), harness side and ground. Yes
GO to
B21 .
No
REPAIR Circuit 647 (GY/LB).
REPEAT the self- test.
CLEAR the DTCs. Klj . 12 ba
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z
Is the resistance greater than 10,000 ohms? B21 CHECK CIRCUIT 647 (GY/LB) FOR OPEN CONDITION
BETWEEN GEM AND BJB z
Measure the resistance between GEM C201d Pin 5,
Circuit 647 (GY/LB), harness side and wiper HIGH/LOW
relay Pin 85, Circuit 647 (GY/LB), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new GEM.
REFER to
Section 419 - 10 .
REPEAT the self- test.
CLEAR the DTCs.
No
REPAIR Circuit 647 (GY/LB).
REPEAT the self- test.
CLEAR the DTCs. B22 CHECK CIRCUIT 61 (YE/RD) FOR OPEN CIRCUIT
CONDITION BETWEEN WIPER ON/OFF AND HIGH/LOW
RELAYS z
Disconnect: Wiper HIGH/LOW Relay.
z Disconnect: Wiper ON/OFF Relay.
z Measure the resistance between wiper ON/OFF relay Pin
3, Circuit 61 (YE/RD), harness side and wiper HIGH/LOW
relay Pin 30, Circuit 61 (YE/RD), harness side.
z Is the resistance less than 5 ohms? Yes
GO to
B23 .
No
REPAIR Circuit 61 (YE/RD).
REPEAT the self- test.
CLEAR the DTCs. B23 CARRY OUT THE WIPER HIGH/LOW RELAY
COMPONENT TEST z
Check the wiper HIGH/LOW relay; refer to Wiring
Diagrams, Cell 149, Component Testing.
z Is the wiper HIGH/LOW relay OK? Yes
GO to
B24 .
No
INSTALL a new wiper
HIGH/LOW relay. REPEAT
the self- test. CLEAR the Klj . 13 ba
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DTCs.
B24 CHECK CIRCUIT 56 (DB/OG) FOR AN OPEN CIRCUIT
BETWEEN THE WIPER HIGH/LOW RELAY AND THE WIPER
MOTOR z
Disconnect: Wiper Motor C125.
z Measure the resistance between wiper HIGH/LOW relay
Pin 87A, Circuit 56 (DB/OG), harness side and wiper
motor C125 Pin 4, Circuit 56 (DB/OG), harness side.
z Is the resistance less than 5 ohms? Yes
GO to
B25 .
No
REPAIR Circuit 56 (DB/OG).
REPEAT the self- test.
CLEAR the DTCs. B25 CHECK CIRCUIT 1205 (BK) FOR OPEN CIRCUIT
CONDITION BETWEEN WIPER MOTOR AND GROUND z
Measure the resistance between wiper motor C125 Pin 3,
Circuit 1205 (BK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
CARRY OUT the windshield
wiper motor component test.
REFER to Component Test.
If the component fails,
INSTALL a new wiper motor;
REFER to
Motor — Windshield
Wiper . REPEAT the self-
test.
CLEAR the DTCs.
No
REPAIR Circuit 1205 (BK).
REPEAT the self- test.
CLEAR the DTCs. B26 CHECK CIRCUIT 58 (WH) FOR AN OPEN CIRCUIT
BETWEEN THE WIPER HIGH/LOW RELAY AND THE WIPER
MOTOR z
Disconnect: Wiper Motor C125.
z Measure the resistance between wiper motor C125 Pin 5,
Circuit 58 (WH), harness side and wiper HIGH/LOW relay
Pin 87, Circuit 58 (WH), harness side.
z Is the resistance less than 5 ohms? Yes
CARRY OUT the windshield
wiper motor component test.
REFER to Component Test.
If the component fails,
INSTALL a new wiper motor;
REFER to
Motor — Windshield
Wiper . REPEAT the self-
test.
CLEAR the DTCs.
No
REPAIR Circuit 58 (WH).
REPEAT the self- test.
CLEAR the DTCs. B27 CHECK CIRCUIT 28 (BK/PK) FOR OPEN CIRCUIT
CONDITION BETWEEN THE WIPER HIGH/LOW RELAY AND
THE WIPER MOTOR Klj . 14 ba
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PINPOINT TEST C: WINDSHIELD WASHERS DO NOT OPERATE /
OPERATE CORRECTLY z
Disconnect: Wiper Motor C125.
z Disconnect: GEM C201d.
z Measure the resistance between wiper motor C125 Pin 1,
Circuit 28 (BK/PK), harness side and GEM C201d Pin 1,
Circuit 58 (WH), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new wiper motor;
REFER to
Motor — Windshield
Wiper . REPEAT the self-
test.
CLEAR the DTCs.
No
REPAIR Circuit 28 (BK/PK).
REPEAT the self- test.
CLEAR the DTCs. Test Step Result / Action to
Take C1 DETERMINE IF GEM IS RECEIVING CORRECT IGNITION
SWITCH STATUS z
Key in OFF position.
z Connect the diagnostic tool.
z NOTE: If the vehicle is equipped with a manual transmission,
depress the clutch while turning the ignition switch to START.
z Monitor the GEM PIDs IGN_S, IGN_R IGN_A, and IGN_KEY
while turning the ignition switch through the START, RUN, OFF
and ACC positions.
z Do the GEM PID values agree with the ignition switch
positions? Yes
GO to
C2 .
No
REFER to Section 413 - 09 .
C2 DETERMINE IF GEM IS RECEIVING CORRECT WIPER SWITCH
STATUS FROM MULTIFUNCTION SWITCH z
Key in ON position.
z Monitor GEM PID WPMODE while activating all wiper control
positions on the multifunction switch.
z Does the GEM PID values agree with switch positions? Yes
GO to
C3 .
No
GO to Pinpoint Test B .
C3 CHECK GEM CONTROL OF THE WASHER ON/OFF RELAY
z
Trigger GEM active command WASH RLY ON and OFF.
z Do washers turn ON and OFF? Yes
INSTALL a new GEM;
REFER to
Section 419 - 10 . REPEAT the
self- test. CLEAR the
DTCs.
No
GO to C4 .
C4 CHECK CIRCUIT 65 (DG) FOR OPEN CIRCUIT BETWEEN CJB
AND WASHER ON/OFF RELAY NOTE:
Verify voltage at CJB F26 (30A) before carrying out this Yes Klj . 15 ba
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