Interior Lighting System: Other Ford Taurus IV рестайлинг

Smart Junction Box (SJB)

The SJB receives inputs from the following

1. door ajar switches
2. liftgate ajar switch (wagon)
3. liftgate glass switch (wagon)
4. headlamp switch
5. remote keyless entry (RKE) transmitter/keyless entry keypad switches
6. powertrain control module (PCM) (vehicle speed signal)
7. ignition switch

The SJB uses these inputs to control the output to the battery saver relay, interior lamp relay and the approach lamp relay. Both relays are integral to the SJB and cannot be accessed directly.

The SJB grounds the battery saver relay and interior lamp relay coils when any door ajar switch or the headlamp switch is closed. The interior lamp relay then supplies power to the interior lamp circuit. Vehicle speed must be less than 5 km/h (3 mph) for the SJB to ground the interior lamp relay. The interior lamps will remain illuminated for a period of up to 25 seconds after all doors are closed or until the ignition is switched from the OFF position, or the SJB receives a vehicle speed signal. Actuating the interior lights from the headlamp switch will operate at any time.

Illuminated Entry

Illuminated entry is activated when a keyless entry keypad switch provides ground on the SJB input or when the SJB receives an unlock signal from a remote keyless entry (RKE) transmitter. The SJB then provides ground to the battery saver and interior lamp relay coils. Illuminated entry is deactivated when the SJB receives a lock signal from an RKE transmitter or if the SJB receives ground inputs from the keyless entry keypad switch lock code. Illuminated entry will also be deactivated when the SJB receives input voltage from the ignition switch.

Battery Saver

The battery saver is activated when the SJB is not receiving voltage input from the ignition switch (OFF position). The SJB will then provide ground to the battery saver relay coil for a maximum of 30 minutes depending on the state of the interior lamp switch inputs to the SJB. The energized battery saver relay switches voltage to the demand lamp circuit and the interior lamp relay coil. After time-out, the SJB removes ground to the battery saver relay disabling the demand lamp circuit.

Approach Lamps

The approach lamp relay coil receives voltage when the ignition switch is in the START or RUN position, which disables the circuit to the approach lamps.

Pinpoint Tests

Note. When installing a new smart junction box (SJB), it must be configured. Refer to MODULE CONFIGURATION .

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1. A1 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCs) Use the recorded results from the SJB self-test. Are any DTCs recorded? Yes : For DTCs B1314 or B1315, GO to «PINPOINT TEST H»(ref-233755-S32681256802006052600000) . For DTC B1322, B1330, B1334, B1338 or B1574, GO to «PINPOINT TEST C»(ref-233755-S00114589612006052600000) . For DTC B1371 or B1373, GO to A11 . For all other DTCs, REFER to the «SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) INDEX»(ref-233755-S35585678212006052600000) . No : GO to A2 .
2. A2 CHECK INOPERATIVE CONDITIONS Monitor the interior lights operation while opening and closing the doors and liftgate, toggling the instrument panel dimmer switch on and off and using the remote keyless entry (RKE) transmitter. Are the interior lights inoperative from more than one input? Yes : GO to A9 . No : GO to A3 .
3. A3 CHECK THE DOOR AJAR SWITCHES Enter the following diagnostic mode on the diagnostic tool: PID/DATA Monitor and Record. Monitor the SJB door ajar PIDs while opening and closing the doors and liftgate and liftgate glass. Do the door ajar PIDs agree with the door positions? Yes : GO to A4 . No : GO to «PINPOINT TEST D»(ref-233755-S15090520372006052600000) .
4. A4 CHECK THE INSTRUMENT PANEL DIMMER SWITCH Monitor the SJB instrument panel dimmer switch position while toggling the dimmer switch on and off. Do the instrument panel dimmer switch PIDs agree with the switch positions? Yes : GO to A8 . No : GO to A5 .
5. A5 CHECK THE INSTRUMENT PANEL DIMMER SWITCH CIRCUIT OPERATION Disconnect: SJB C2280e. Measure the resistance between the SJB C2280e pin 7, circuit 1008 (LG/OG), harness side and ground while toggling the dimmer switch on and off. Is the resistance less than 5 ohms with the dimmer switch in the ON position and greater than 10,000 ohms with the dimmer switch is in the OFF position? Yes : GO to A14 . No : GO to A6 .
6. A6 CHECK CIRCUIT 1008 (LG/OG) FOR AN OPEN Disconnect: Instrument Panel Dimmer Switch C205b. Measure the resistance between the instrument panel dimmer switch C205b pin 2, circuit 1008 (LG/OG), harness side and SJB C2280e pin 7, circuit 1008 (LG/OG), harness side. Is the resistance less than 5 ohms? Yes : GO to A7 . No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
7. A7 CHECK CIRCUIT 57 (BK) FOR AN OPEN Measure the resistance between the instrument panel dimmer switch C205b pin 4, circuit 57 (BK) harness side and ground. Is the resistance less than 5 ohms? Yes : INSTALL a new instrument panel dimmer switch. REFER to «INSTRUMENT CLUSTER AND PANEL ILLUMINATION»(ref-233751) . CLEAR the DTCs. REPEAT the self-test. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
8. A8 CHECK THE REMOTE KEYLESS ENTRY (RKE) TRANSMITTER Monitor the door locks while locking and unlocking the doors using the RKE transmitter. Do the doors lock and unlock? Yes : GO to A9 . No : REFER to «HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS»(ref-233732) to diagnose the door locks.
9. A9 CHECK CIRCUIT 1052 (TN/BK) Disconnect: SJB C2280a. Measure the voltage between the SJB C2280a pin 13, circuit 1052 (TN/BK), harness side and ground. Is the voltage greater than 10 volts? Yes : RECONNECT the SJB C2280a. GO to A10 . No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
10. A10 CHECK CIRCUIT 53 (BK/LB) Using the RKE transmitter, activate the illuminated entry. Do the approach lamps illuminate? Yes : GO to A13 . No : GO to A11 .
11. A11 CHECK VOLTAGE TO BATTERY SAVER RELAY AND INTERIOR LAMP RELAY Disconnect: SJB C2280c. Measure the voltage between the SJB C2280c pin 14, circuit 543 (DG) component side and ground. Is the voltage greater than 10 volts? Yes : GO to A12 . No : GO to A14 .
12. A12 CHECK BATTERY SAVER RELAY Measure the voltage between the SJB C2280c pin 9, circuit 705 (LG/OG) component side and ground. Is the voltage greater than 10 volts? Yes : GO to A13 . No : GO to A14 .
13. A13 CHECK INTERIOR LAMP RELAY Open the doors and rotate instrument panel dimmer switch to the ON position. Measure the voltage between the SJB C2280c pin 22, circuit 53 (BK/LB), component side and ground. Is the voltage greater than 10 volts? Yes : REPAIR circuit 53 (BK/LB). CLEAR the DTCs. REPEAT the self test. No : GO to A14 .
14. A14 CHECK FOR CORRECT SJB OPERATION Disconnect all the SJB connectors. Check for: corrosion pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes : INSTALL a new SJB. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-233722) . CLEAR the DTCs. REPEAT the 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.

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1. B1 CHECK INOPERATIVE LAMP(S) Monitor the interior lights operation while opening and closing the doors and liftgate, toggling the instrument panel dimmer switch on and off and using the remote keyless entry (RKE) transmitter. Are the individual interior lamps operating correctly? Yes : GO to «SYMPTOM CHART»(ref-233755-S26452003212006052600000) . No : For inoperative approach lamp(s), GO to B2 . For all other lamp(s) GO to B3 .
2. B2 CHECK APPROACH LAMP OPERATION Monitor the approach lamps operation while opening and closing the doors and liftgate, toggling the instrument panel dimmer switch on and off and using the RKE transmitter. Are both approach lamps inoperable? Yes : GO to B5 . No : GO to B3 .
3. B3 CHECK INOPERATIVE LAMP POWER CIRCUIT FOR OPEN Measure the voltage between the inoperative interior lamp, harness side and ground. Refer to the following table for location, connector, pin and circuit information. Location Connector (Pin) Circuit Cargo lamp C489 (1) 53 (BK/LB) Driver side approach lamp C520 (5) 667 (WH/RD) Passenger side approach lamp C601 (5) 667 (WH/RD) Dome lamp (with roof opening) C918 (1) 53 (BK/LB) Dome lamp C918 (1) 53 (BK/LB) Are the voltages greater than 10 volts? Yes : GO to B4 . No : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
4. B4 CHECK THE INOPERATIVE LAMP GROUND CIRCUIT FOR OPEN Measure the resistance between the inoperative interior lamp, harness side and ground. Refer to the following table for location, connector, pin and circuit information. Location Connector (Pin) Circuit Cargo lamp C489 (2) 57 (BK) Driver side approach lamp C520 (1) 57 (BK) Passenger side approach lamp C601 (1) 57 (BK) Dome lamp (with roof opening) C918 (2) 57 (BK) Dome lamp C918 (2) 57 (BK) Are the resistances less than 5 ohms? Yes : INSTALL a new lamp in question. CLEAR the DTCs. REPEAT the self-test. No : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
5. B5 CHECK THE IGNITION SWITCH PIDS Enter the following diagnostic mode on the diagnostic tool: PID/DATA Monitor and Record. Monitor the SJB ignition switch position PIDs while cycling the ignition switch through the ignition positions. Do the ignition switch PIDs agree with the ignition switch positions? Yes : GO to B6 . No : REFER to «STEERING COLUMN SWITCHES»(ref-233731) to continue diagnosis of the ignition switch.
6. B6 CHECK CIRCUIT 687 (GY/YE) FOR A SHORT TO POWER Key in OFF position. Disconnect: SJB C2280b. Measure the voltage between the SJB C2280b pin 20, circuit 687 (GY/YE), harness side and ground. Is any voltage indicated? Yes : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. No : GO to B7 .
7. B7 CHECK CIRCUIT 667 (WH/RD) FOR AN OPEN Disconnect: SJB C2280c. Disconnect: LH Approach Lamp C520. Measure the resistance between the SJB C2280c pin 1, circuit 667 (WH/RD), harness side and the LH approach lamp C520 pin 5, circuit 667 (WH/RD), harness side. Is the resistance less than 5 ohms? Yes : GO to B8 . No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
8. B8 CHECK FOR CORRECT SJB OPERATION Disconnect all the SJB connectors. Check for: corrosion pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes : INSTALL a new SJB. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-233722) . CLEAR the DTCs. REPEAT the 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.

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1. C1 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCs) Use the recorded results from the smart junction box (SJB) self-test. Are any DTCs recorded? Yes : For DTCs B1314 or B1315, GO to «PINPOINT TEST H»(ref-233755-S32681256802006052600000) . For DTC B1322, B1330, B1334, B1338 or B1574, GO to C3 . For DTC B1371 or B1373, GO to «PINPOINT TEST A»(ref-233755-S17225157292006052600000) . For all other DTCs, REFER to the «SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) INDEX»(ref-233755-S35585678212006052600000) . No : GO to C2 .
2. C2 CHECK DOOR AJAR PIDS Enter the following diagnostic mode on the diagnostic tool: PID/DATA Monitor and Record. Monitor the door ajar PIDs while opening and closing each door, the liftgate and liftgate glass. Do the door ajar PIDs agree with the door positions? Yes : GO to C5 . No : GO to C3 .
3. C3 CHECK THE DOOR AJAR SIGNAL CIRCUIT FOR A SHORT TO GROUND Disconnect: SJB C2280f. Disconnect the suspect door ajar switch. Measure the resistance between the SJB C2280f, harness side and ground. Refer to the following chart for correct location, connector, pin and circuit information. Location SJB Connector (Pin) Circuit LF Door C2280f(5) 765 (YE/BK) RF Door C2280f(19) 761 (GY/RD) LR Door C2280f(20) 759 (LG/YE) RR Door C2280f(7) 760 (PK/LB) Liftgate Glass C2280f(21) 700 (WH/VT) Liftgate C2280f(21) 700 (WH/VT) Is the resistance greater than 10,000 ohms? Yes : GO to C4 . No : REPAIR the circuit in question. Clear the DTCs. REPEAT the self-test.
4. C4 CHECK THE DOOR AJAR SWITCH Measure the resistance between the suspect door ajar switch, pin 1 component side and suspect door ajar switch, pin 2 component side while toggling the switch open and closed. Is the resistance less than 5 ohms when switch is closed and greater than 10,000 ohms when the switch is open? Yes : GO to C8 . No : INSTALL a new door ajar switch. REFER to «HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS»(ref-233732) . CLEAR the DTCs. REPEAT the self-test.
5. C5 CHECK CIRCUIT 53 (BK/LB) FOR SHORT TO POWER Disconnect: SJB C2280c. Measure the voltage between the SJB C2280c pin 22, circuit 53 (BK/LB), harness side and ground. Is any voltage indicated? Yes : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. No : GO to C6 .
6. C6 CHECK CIRCUIT 1008 (LG/OG) FOR SHORT TO GROUND Rotate the instrument panel dimmer switch to the OFF position. Disconnect: SJB C2280e. Measure the resistance between the SJB C2280e pin 7, circuit 1008 (LG/OG), harness side and ground. Is the resistance greater than 10,000 ohms? Yes : GO to C8 . No : GO to C7 .
7. C7 CHECK THE INSTRUMENT PANEL DIMMER SWITCH Disconnect: Instrument Panel Dimmer Switch C205b. Measure the resistance between the SJB C2280e pin 7, circuit 1008 (LG/OG), harness side and ground. Is the resistance greater than 10,000 ohms? Yes : INSTALL a new instrument panel dimmer switch. REFER to «INSTRUMENT CLUSTER AND PANEL ILLUMINATION»(ref-233751) . CLEAR the DTCs. REPEAT the self-test. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
8. C8 CHECK FOR CORRECT SJB OPERATION Disconnect all the SJB connectors. Check for: corrosion pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes : INSTALL a new SJB. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-233722) . CLEAR the DTCs. REPEAT the 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.

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1. D1 CHECK DOOR AJAR PIDS Enter the following diagnostic mode on the diagnostic tool: PID/DATA Monitor and Record. Monitor the door ajar PIDs while opening and closing each door, the liftgate and the liftgate glass. Do the door ajar PIDs agree with the door positions? Yes : GO to D5 . No : GO to D2 .
2. D2 CHECK CIRCUIT 57 (BK) FOR AN OPEN Disconnect the inoperative door ajar switch. Measure the resistance between the inoperative door ajar switch, harness side and ground. Refer to the following chart for the correct location, connector, pin and circuit information. Location Connector (Pin) Circuit LF door C526 (2) 57 (BK) RF door C602 (2) 57 (BK) LR door C715 (2) 57 (BK) RR door C820 (2) 57 (BK) Liftgate glass C487 (2) 57 (BK) Liftgate C479 (2) 57 (BK) Are the resistances less than 5 ohms? Yes : GO to D3 . No : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
3. D3 CHECK THE DOOR AJAR SWITCH SIGNAL CIRCUIT FOR AN OPEN Disconnect: SJB C2280f. Measure the resistance between the SJB C2280f, harness side and the inoperative door ajar switch, harness side. Refer to the following chart for correct location, connector, pin and circuit information. Location SJB Connector (Pin) Door Ajar Connector (Pin) Circuit LF door C2280f (5) C526 (1) 765 (YE/BK) RF door C2280f (19) C602 (1) 761 (GY/RD) LR door C2280f (20) C715 (1) 759 (LG/YE) RR door C2280f (7) C820 (1) 760 (PK/LB) Liftgate glass C2280f (21) C478 (1) 700 (WH/VT) Liftgate C2280f (21) C479 (1) 700 (WH/VT) Are the resistances less than 5 ohms? Yes : GO to D4 . No : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
4. D4 CHECK THE DOOR AJAR SWITCH Measure the resistance between the suspect door ajar switch, pin 1 component side and suspect door ajar switch, pin 2 component side while toggling the switch open and closed. Is the resistance less than 5 ohms when switch is closed and greater than 10,000 ohms when the switch is open? Yes : GO to D5 . No : INSTALL a new door ajar switch in question. REFER to «HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS»(ref-233732) . CLEAR the DTCs. REPEAT the self-test.
5. D5 CHECK FOR CORRECT SJB OPERATION Disconnect all the SJB connectors. Check for: corrosion pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes : INSTALL a new SJB. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-233722) . CLEAR the DTCs. REPEAT the 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.