2003 FORD MUSTANG Workshop Manual

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Page 3065 of 4378

FORD MUSTANG 2003 Workshop Manual tool: �z Monitor the PCM PID WACF while turning the function selector. �z Does the PCM PID WACF read YES? Control/Emissions Diagnosis (PC/ED) manual. No GO to C3 . C3 CHECK THE PCM PID ACCS

Page 3066 of 4378

FORD MUSTANG 2003 Workshop Manual �z Is the voltage reading greater than 10 volts? C8 CHECK CIRCUIT 883 (PK/LB) FOR A SHORT TO GROUND �z Key in OFF position. �z Measure the resistance between the function selector switch C294c- 2

Page 3067 of 4378

FORD MUSTANG 2003 Workshop Manual �z Turn the function selector switch to each of the following positions and note the resistance reading: �zMAX A/C �z A/C �z VENT �z FLOOR �z MIX �z DEFROST �z Are any of the readings less tha

Page 3068 of 4378

FORD MUSTANG 2003 Workshop Manual �z Is the resistance reading less than 10,000 ohms? C13 CHECK CIRCUIT 198 (DG/OG) FOR A SHORT TO GROUND �z Connect: A/C Pressure Cut- off Switch C1078. �z Measure the resistance between PCM C175-

Page 3069 of 4378

FORD MUSTANG 2003 Workshop Manual �z Is the voltage reading greater than 10 volts? C16 MEASURE THE RESISTANCE OF CIRCUIT 348 (VT) �z Key in OFF position. �z Disconnect: Function Selector Switch C294c. �z Measure the resistance bet

Page 3070 of 4378

FORD MUSTANG 2003 Workshop Manual �z Is the voltage reading greater than 10 volts? C18 CHECK THE A/C CYCLING SWITCH �z Key in OFF position. �z Disconnect: A/C Cycling Switch C130. �z NOTE: The A/C pressure cut- off switch C1078 f

Page 3071 of 4378

FORD MUSTANG 2003 Workshop Manual �z Disconnect: CCRM C1262. �z Measure the resistance of CCRM C1262- 18, circuit 1205 (BK), harness side and ground. �z Is the resistance reading less than 5 ohms? GO to C21 . No REPAIR circuit

Page 3072 of 4378

FORD MUSTANG 2003 Workshop Manual �z Is the voltage greater than 10 volts? C23 CHECK CIRCUIT 331 (PK/YE) FOR AN OPEN. �z Key in OFF position. �z Disconnect: CCRM C1262. �z Key in ON position. �z Enter the following diagnostic mod
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