Wipers and Washers: Overview Ford Fusion I рестайлинг

Windshield Wiper Operation

Note. The smart junction box (SJB) may also be identified as the generic electronic module (GEM).

The multi-function switch controls the front wiper/washer portion and is wired to the SJB. When the switch is moved to the desired position, one or more of circuits CRW18 (VT/WH), CRW19 (BU/OG), CRW08 (VT/OG) or CRW17 (GN/VT) is grounded through circuit CD116 (BK/VT). This will provide the necessary inputs for the SJB to control the run/park relay and the high/low relay (integral to the SJB) coils. In order to achieve high-speed operation, both relays are energized. The SJB will respond to the multi-function switch inputs only when the ignition lock cylinder is in RUN or ACC.

The SJB includes a speed dependent feature which compensates for the extra moisture that accumulates on the windshield at higher vehicle speeds when the multi-function switch is in any intermittent setting except the INT 1 position. As vehicle speed increases, the speed dependent feature gradually shortens the delay between wipes.

The speed dependent feature is easiest to verify in the INT 2 position. With the vehicle at a standstill and the multi-function switch in the INT 2 position, the wipers should operate once every 10 seconds. As vehicle speed increases, the delay between wipes will gradually shorten. For example, by the time the vehicle reaches 100 km/h (62 mph), the wipers should operate every 5 seconds. Speed dependent operation is similar in INT 3, INT 4 and INT 5 modes.

Normal Operation

When the smart junction box (SJB) receives input from the multi-function switch to activate the wipers, the SJB activates the RUN/PARK relay through circuit RRW24 (GN/VT). When the RUN/PARK relay is activated, voltage is supplied back to the SJB through circuit CRW03 (VT/WH) into the (integral) HIGH/LOW relay. The windshield wiper motor receives power from the HIGH/LOW relay (integral to the SJB) through circuit CRW16 (GY/BN) for low speed and circuit CRW15 (BN/WH) for high speed. The windshield wiper motor is grounded through circuit GD121 (BK/YE). The multi-function switch is grounded through circuit GD116 (BK/VT).

1. DTC B1432 Wiper Brake/Run Relay Circuit Short to Battery - Output shorted to battery when output is active.

This pinpoint test is intended to diagnose the following

1. Fuse(s)
2. Wiring, terminals or connectors
3. RUN/PARK relay
4. Multi-function switch
5. Windshield wiper motor
6. SJB module

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1. A1 RETRIEVE THE RECORDED SJB DTCs FROM THE WIPER CONTROL SELF-TEST Use the recorded SJB DTCs from the Wiper Control Self-Test. Are any DTCs recorded? YES : For DTC B1432, go to A7 . NO : Go to A2 .
2. A2 CHECK THE MULTI-FUNCTION SWITCH INPUTS TO THE SJB - MONITOR SJB PIDS FRNWIPER_A, FRNWIPER_B, FRNWIPER_C AND FRNWIPER_H Enter the following diagnostic mode on the scan tool: SJB DataLogger. Monitor the SJB PIDs FRNWIPER_A, FRNWIPER_B, FRNWIPER_C and FRNWIPER_H while turning the multi-function switch through all positions. Refer to table. Multi- function Switch Position FRN- WIPER_A FRN- WIPER_B FRN- WIPER_C FRN- WIPER_H INT 1 Active Inactive Inactive Inactive INT 2 Active Active Inactive Inactive INT 3 Inactive Active Inactive Inactive INT 4 Inactive Active Active Inactive INT 5 Inactive Inactive Active Inactive LOW Active Inactive Active Inactive HIGH Inactive Inactive Inactive Active Do the PID values agree with the multi-function switch positions? YES : Go to A5 . NO : Go to A3 .
3. A3 CHECK THE MULTI-FUNCTION SWITCH Key in OFF position. Disconnect: Multi-function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to COMPONENT TESTING. Did the multi-function switch pass the component test? YES : Go to A4 . NO : INSTALL a new multi-function switch. REFER to «STEERING COLUMN SWITCHES»(ref-291886) article.
4. A4 CHECK CIRCUIT GD116 (BK/VT) FOR AN OPEN Key in OFF position. Measure the resistance between multi-function switch C202-15, circuit GD116 (BK/VT), harness side and ground. Is the resistance less than 5 ohms? YES : Go to A5 . NO : REPAIR the circuit. TEST the system for normal operation.
5. A5 CHECK THE WINDSHIELD WIPER MOTOR CIRCUIT GD121 (BK/YE) FOR AN OPEN Disconnect: Windshield Wiper Motor C125 Measure the resistance between windshield wiper motor C125-4, circuit GD121 (BK/YE), harness side and ground. Is the resistance less than 5 ohms? YES : Go to A6 . NO : REPAIR the circuit. TEST the system for normal operation.
6. A6 CHECK CIRCUIT CRW16 (GY/BN) FOR VOLTAGE Key in ON position. Place the multi-function switch into the low speed position. Measure the voltage between windshield wiper motor C125-5, circuit CRW16 (GY/BN), harness side and ground. Is the voltage greater than 10 volts? YES : INSTALL a new windshield wiper motor. REFER to «Wiper Motor»(ref-291873-S02943738852008073000000) . NO : Go to A7 .
7. A7 CHECK THE WIPER RUN/PARK RELAY Disconnect: Windshield Wiper RUN/PARK Relay Carry out the Run/Park Relay Component Test. Refer to COMPONENT TESTING. Did the RUN/PARK relay pass the component test? YES : Go to A8 . NO : INSTALL a new RUN/PARK relay. TEST the system for normal operation.
8. A8 CHECK CIRCUIT SBB09 (RD) FOR AN OPEN Measure the voltage between windshield wiper RUN/PARK relay pin 87, circuit SBB09 (RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to A9 . NO : VERIFY the battery junction box (BJB) fuse 9 (20A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
9. A9 CHECK CIRCUIT CBP23 (BN/YE) FOR AN OPEN Measure the voltage between windshield wiper RUN/PARK relay pin 86, circuit CBP23 (BN/YE), harness side and ground. Is the voltage greater than 10 volts? YES : Go to A12 . NO : Go to A10 .
10. A10 CHECK CIRCUIT CBP23 (BN/YE) FOR AN OPEN Key in OFF position. Disconnect: SJB C2280a Measure the resistance between windshield wiper RUN/PARK relay pin 86, circuit CBP23 (BN/YE), harness side and SJB C2280a-24, circuit CBP23 (BN/YE), harness side. Is the resistance less than 5 ohms? YES : Go to A11 . NO : REPAIR the circuit. TEST the system for normal operation.
11. A11 CHECK CIRCUIT CDC33 (VT/GN) FOR AN OPEN Disconnect: SJB C2280b Key in ON position. Measure the voltage between SJB C2280b-4, circuit CDC33 (VT/GN), harness side and ground. Is the voltage greater than 10 volts? YES : VERIFY SJB fuse 23 (7.5A) is OK. If OK, go to A14 . NO : DIAGNOSE the ignition switch circuit. REFER to «STEERING COLUMN SWITCHES»(ref-291886) article. TEST the system for normal operation.
12. A12 CHECK CIRCUIT RRW24 (GN/VT) FOR AN OPEN Key in OFF position. Disconnect: SJB C2280a Measure the resistance between windshield wiper RUN/PARK relay pin 85, circuit RRW24 (VT/GN), harness side and SJB C2280a-14, circuit RRW24 (VT/GN), harness side. Is the resistance less than 5 ohms? YES : Go to A13 . NO : REPAIR the circuit. TEST the system for normal operation.
13. A13 CHECK CIRCUIT CRW03 (VT/WH) FOR AN OPEN Measure the resistance between windshield wiper RUN/PARK relay pin 30, circuit CRW03 (VT/WH), harness side and SJB C2280a-1, CRW03 (VT/WH), harness side. Is the resistance less than 5 ohms? YES : Go to A14 . NO : REPAIR the circuit. TEST the system for normal operation.
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-291878) article. TEST the system for normal operation. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

The smart junction box (SJB) receives input from the multi-function switch through circuits CRW18 (VT/WH), CRW19 (BU/OG), CRW08 (VT/OG) and CRW17 (GN/VT). To enable the wipers, the SJB activates the RUN/PARK relay through circuit RRW24 (GN/VT). When the RUN/PARK relay is activated, voltage is supplied back to the SJB through circuit CRW03 (VT/WH) into the (integral) HIGH/LOW relay. The windshield wiper motor receives power from the HIGH/LOW relay (integral to the SJB) through circuit CRW16 (GY/BN) for low speed and circuit CRW15 (BN/WH) for high speed. The windshield wiper motor is grounded through circuit GD121 (BK/YE). The multi-function switch is grounded through circuit GD116 (BK/VT).

This pinpoint test is intended to diagnose the following

1. RUN/PARK relay
2. Wiring, terminals or connectors
3. Multi-function switch
4. Windshield wiper motor
5. SJB module

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1. B1 RETRIEVE THE RECORDED SJB DTCs FROM THE WIPER CONTROL SELF-TEST Use the recorded SJB DTCs from the Wiper Control Self-Test. Are any DTCs recorded? YES : For DTC B1433, go to B4 . NO : Go to B2 .
2. B2 CHECK THE MULTI-FUNCTION SWITCH INPUTS TO THE SJB - MONITOR SJB PIDS FRNWIPER_A, FRNWIPER_B, FRNWIPER_C AND FRNWIPER_H Key in ON position. Enter the following diagnostic mode on the scan tool: SJB DataLogger. Monitor the SJB PIDs FRNWIPER_A, FRNWIPER_B, FRNWIPER_C and FRNWIPER_H while turning the multi-function switch through all positions. Refer to table. Multi- function Switch Position FRN- WIPER_A FRN- WIPER_B FRN- WIPER_C FRN- WIPER_H INT 1 Active Inactive Inactive Inactive INT 2 Active Active Inactive Inactive INT 3 Inactive Active Inactive Inactive INT 4 Inactive Active Active Inactive INT 5 Inactive Inactive Active Inactive LOW Active Inactive Active Inactive HIGH Inactive Inactive Inactive Active Do the PID values agree with the multi-function switch positions? YES : Go to B5 . NO : Go to B3 .
3. B3 CHECK THE MULTI-FUNCTION SWITCH Key in OFF position. Disconnect: Multi-function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to COMPONENT TESTING. Did the multi-function switch pass the component test? YES : Go to B4 . NO : INSTALL a new multi-function switch. REFER to «STEERING COLUMN SWITCHES»(ref-291886) article.
4. B4 CHECK CIRCUITS CRW17 (GN/VT), CRW18 (VT/WH) AND CRW19 (BU/OG) FOR SHORT TO GROUND Disconnect: SJB C2280d Measure the resistance between multi-function switch C202-16, circuit CRW19 (BU/OG), harness side and ground; and between C202-11, circuit CRW18 (VT/WH), harness side and ground; and between C202-12, circuit CRW17 (GN/VT), harness side and ground. Is the resistance for all measurements greater than 10,000 ohms? YES : Go to B11 . NO : REPAIR the circuit. TEST the system for normal operation.
5. B5 CHECK WIPER OPERATION WITH THE PARK RELAY REMOVED Disconnect: Wiper PARK Relay Observe the wiper operation with the PARK relay removed. Are the wipers still operating? YES : Go to B6 . NO : INSTALL a new windshield wiper motor. REFER to «Wiper Motor»(ref-291873-S02943738852008073000000) .
6. B6 CHECK WIPER OPERATION WITH THE RUN/PARK RELAY REMOVED Disconnect: Wiper RUN/PARK Relay Observe the wiper operation with the RUN/PARK relay removed. Are the wipers still operating? YES : Go to B9 . NO : Go to B7 .
7. B7 CHECK THE WIPER RUN/PARK RELAY Carry out the Run/Park Relay Component Test. Refer to COMPONENT TESTING. Did the RUN/PARK relay pass the component test? YES : Go to B8 . NO : INSTALL a new RUN/PARK relay. TEST the system for normal operation.
8. B8 CHECK CIRCUIT RRW24 (GN/VT) FOR A SHORT TO GROUND Key in OFF position. Disconnect: SJB C2280a Measure the resistance between windshield wiper RUN/PARK relay pin 85, circuit RRW24 (GN/VT), harness side and ground. Is the resistance greater than 10,000 ohms? YES : Go to B11 . NO : REPAIR the circuit. TEST the system for normal operation.
9. B9 CHECK CIRCUIT CRW03 (VT/WH) FOR A SHORT TO VOLTAGE Key in OFF position. Disconnect: SJB C2280a Key in ON position. Measure the voltage between wiper RUN/PARK relay pin 30, circuit CRW03 (VT/WH), harness side and ground. Is the voltage greater than 10 volts? YES : REPAIR the circuit. TEST the system for normal operation. NO : Go to B10 .
10. B10 CHECK CIRCUITS CRW15 (BN/WH) AND CRW16 (GY/BN) FOR A SHORT TO VOLTAGE Disconnect: Wiper Motor C125 Measure the voltage between wiper motor C125-3, circuit CRW15 (BN/WH), harness side and ground; and between C125-5, circuit CRW16 (GY/BN), harness side and ground. Is the voltage greater than 10 volts for either measurement? YES : REPAIR the circuit. TEST the system for normal operation. NO : Go to B11 .
11. B11 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-291878) article. TEST the system for normal operation. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

The smart junction box (SJB) receives input from the multi-function switch through circuits CRW18 (VT/WH), CRW19 (BU/OG), CRW08 (VT/OG) and CRW17 (GN/VT). To enable the wipers, the SJB activates the RUN/PARK relay through circuit RRW24 (GN/VT). When the RUN/PARK relay is activated, voltage is supplied back to the SJB through circuit CRW03 (VT/WH) into the (integral) HIGH/LOW relay. The windshield wiper motor receives power from the HIGH/LOW relay (integral to the SJB) through circuit CRW16 (GY/BN) for low speed and circuit CRW15 (BN/WH) for high speed. The windshield wiper motor is grounded through circuit GD121 (BK/YE). The multi-function switch is grounded through circuit GD116 (BK/VT).

1. DTC B2183 Front Wiper Select Switch "H" Short to Ground - Switch input shorted to ground.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Multi-function switch
3. Windshield wiper motor
4. SJB module

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1. C1 RETRIEVE THE RECORDED DTCs FROM THE WIPER CONTROL SELF-TEST Key in ON position. Use the recorded SJB DTCs from the Wiper Control Self-Test. Are any DTCs recorded? YES : For DTC B1432, go to «Pinpoint Test A»(ref-291873-S21416965142008073000000) . For DTC B1433, go to «Pinpoint Test B»(ref-291873-S26540531642008073000000) . For DTC B1447, go to «Pinpoint Test F»(ref-291873-S26916137592008073000000) . Go to C2 . NO : Go to C2 .
2. C2 CHECK THE MULTI-FUNCTION SWITCH INPUT TO THE SJB - MONITOR SJB PIDS FRNWIPER_A, FRNWIPER_B, FRNWIPER_C AND FRNWIPER_H Key in ON position. Enter the following diagnostic mode on the scan tool: SJB DataLogger. Monitor the SJB PIDs FRNWIPER_A, FRNWIPER_B, FRNWIPER_C and FRNWIPER_H while turning the multi-function switch through all positions. Refer to table. Multi- function Switch Position Wiper_A Wiper_B Wiper_C Wiper_H INT 1 Active Inactive Inactive Inactive INT 2 Active Active Inactive Inactive INT 3 Inactive Active Inactive Inactive INT 4 Inactive Active Active Inactive INT 5 Inactive Inactive Active Inactive LOW Active Inactive Active Inactive HIGH Inactive Inactive Inactive Active Do the PID values agree with the multi-function switch positions? YES : Go to C5 . NO : Go to C3 .
3. C3 CHECK THE MULTI-FUNCTION SWITCH Key in OFF position. Disconnect: Multi-function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to COMPONENT TESTING. Did the multi-function switch pass the component test? YES : Go to C4 . NO : INSTALL a new multi-function switch. REFER to «STEERING COLUMN SWITCHES»(ref-291886) article.
4. C4 CHECK CIRCUIT CRW17 (GN/VT), CRW18 (VT/WH), CRW08 (VT/OG) AND CRW19 (BU/OG) FOR AN OPEN OR SHORT TO GROUND Disconnect: SJB C2280d Measure the resistance between multi-function switch and SJB; and between the multi-function switch and ground as follows: Multi-function Switch SJB Connector Circuit C202-16 C2280d-21 CRW19 (BU/OG) C202-11 C2280d-22 CRW18 (VT/WH) C202-9 C2280d-32 CRW08 (VT/OG) C202-12 C2280d-23 CRW17 (GN/VT) Is the resistance between the multi-function switch and SJB less than 5 ohms; and greater than 10,000 ohms between the multi-function switch and ground? YES : Go to C9 . NO : REPAIR the circuit in question. TEST the system for normal operation.
5. C5 CHECK CIRCUIT CRW15 (BN/WH) FOR VOLTAGE Disconnect: Windshield Wiper Motor C125 Place the multi-function switch to the HIGH speed position. Measure the voltage between wiper motor C125-3, circuit CRW15 (BN/WH), harness side and ground. Is the voltage greater than 10 volts? YES : Go to C7 . NO : Go to C6 .
6. C6 CHECK CIRCUIT CRW15 (BN/WH) FOR AN OPEN Key in OFF position. Disconnect: SJB C2280a Measure the resistance between wiper motor C125-3, circuit CRW15 (BN/WH), harness side and SJB C2280a-2, circuit CRW15 (BN/WH), harness side. Is the resistance less than 5 ohms? YES : Go to C9 . NO : REPAIR the circuit. TEST the system for normal operation.
7. C7 CHECK CIRCUIT CRW16 (GY/BN) FOR VOLTAGE Disconnect: Windshield Wiper Motor C125 Place the multi-function switch to the LOW speed position. Measure the voltage between wiper motor C125-5, circuit CRW16 (GY/BN), harness side and ground. Is the voltage greater than 10 volts? YES : INSTALL a new windshield wiper motor. REFER to «Wiper Motor»(ref-291873-S02943738852008073000000) . NO : Go to C8 .
8. C8 CHECK CIRCUIT CRW16 (GY/BN) FOR AN OPEN Key in OFF position. Disconnect: SJB C2280a Measure the resistance between wiper motor C125-5, circuit CRW16 (GY/BN), harness side and SJB C2280a-3, circuit CRW16 (GY/BN), harness side. Is the resistance less than 5 ohms? YES : Go to C9 . NO : REPAIR the circuit. TEST the system for normal operation.
9. C9 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-291878) article. TEST the system for normal operation. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

The windshield washer pump is grounded at all times through circuit GD123 (BK/GY). When WASH mode is selected, the smart junction box (SJB) receives input from the multi-function switch through circuit CRW07 (GY/BN). The SJB then activates the washer pump relay (integral to SJB) which supplies voltage to the washer pump through circuit CRW14 (BU/WH).

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Multi-function switch
3. SJB module
4. Windshield washer pump

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1. D1 CHECK THE MULTI-FUNCTION SWITCH INPUT TO THE SJB - MONITOR SJB PID FRNWIPER_W Key in ON position. Enter the following diagnostic mode on the scan tool: SJB DataLogger. Monitor the SJB PID FRNWIPER_W while moving the multi-function switch to the WASH position. Does the PID value agree with the multi-function switch position when WASH is selected? YES : Go to D4 . NO : Go to D2 .
2. D2 CHECK THE MULTI-FUNCTION SWITCH Key in OFF position. Disconnect: Multi-function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to COMPONENT TESTING. Did the multi-function switch pass the component test? YES : Go to D3 . NO : INSTALL a new multi-function switch. REFER to «STEERING COLUMN SWITCHES»(ref-291886) article. TEST the system for normal operation.
3. D3 CHECK CIRCUIT CRW07 (GY/BN) FOR AN OPEN Disconnect: SJB C2280d Key in OFF position. Measure the resistance between multi-function switch C202-10, circuit CRW07 (GY/BN), harness side and SJB C2280d-31, circuit CRW07 (GY/BN), harness side. Is the resistance less than 5 ohms? YES : Go to D6 . NO : REPAIR the circuit. TEST the system for normal operation.
4. D4 CHECK CIRCUIT GD123 (BK/GY) FOR AN OPEN Key in OFF position. Disconnect: Washer Pump C137 Measure the resistance between washer pump C137-2, circuit GD123 (BK/GY), harness side and ground. Is the resistance less than 5 ohms? YES : Go to D5 . NO : REPAIR the circuit. TEST the system for normal operation.
5. D5 CHECK CIRCUIT CRW14 (BU/WH) FOR VOLTAGE Key in ON position. While activating the front washer pump using the multi-function switch, measure the voltage between windshield washer pump C137-1, circuit CRW14 (BU/WH), harness side and ground. Is the voltage greater than 10 volts? YES : INSTALL a new windshield washer pump. REFER to «Washer Pump»(ref-291873-S31222503712008073000000) . TEST the system for normal operation. NO : VERIFY SJB fuse 14 (15A) is OK. If OK, go to D6 .
6. D6 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-291878) article. TEST the system for normal operation. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

The windshield washer pump is grounded at all times through circuit GD123 (BK/GY). When WASH mode is selected, the smart junction box (SJB) receives input from the multi-function switch through circuit CRW07 (GY/BN). The SJB then activates the washer pump relay (integral to SJB) which supplies voltage to the washer pump through circuit CRW14 (BU/WH).

1. DTC B2184 Front Wiper Select Switch "W" Short to Ground - Switch input shorted to ground.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Multi-function switch
3. SJB module

Scheme 21

1. E1 CHECK THE MULTI-FUNCTION SWITCH Key in OFF position. Disconnect: Multi-function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to COMPONENT TESTING. Did the multi-function switch pass the component test? YES : Go to E2 . NO : INSTALL a new multi-function switch. REFER to «STEERING COLUMN SWITCHES»(ref-291886) article. TEST the system for normal operation.
2. E2 CHECK CIRCUIT CRW07 (GY/BN) FOR A SHORT TO GROUND Measure the resistance between multi-function switch C202-10, circuit CRW07 (GY/BN), harness side and ground. Is the resistance greater than 10,000 ohms? YES : Go to E3 . NO : REPAIR the circuit. TEST the system for normal operation.
3. E3 CHECK CIRCUIT CRW14 (BU/WH) FOR A SHORT TO VOLTAGE Disconnect: SJB C2280a Disconnect: Washer Pump C137 Key in ON position. Measure the voltage between washer pump motor C137-1, circuit CRW14 (BU/WH), harness side and ground. Is the voltage greater than 10 volts? YES : REPAIR the circuit. TEST the system for normal operation. NO : Go to E4 .
4. E4 CHECK FOR CORRECT SJB OPERATION Key in OFF position. 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-291878) article. TEST the system for normal operation. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

With the ignition key in RUN or ACC, the windshield wiper motor receives voltage at all times from the wiper PARK relay through circuit SBB09 (RD). When the wipers are commanded OFF, the smart junction box (SJB) deactivates the RUN/PARK relay. Voltage is supplied from the park switch (integral to the wiper motor) to the RUN/PARK relay through circuit CRW09 (BN/BU) to operate the wipers until they are parked. When the wipers are parked, the park switch (integral to the wiper motor) supplies ground to the RUN/PARK relay and the wipers will stop. The SJB monitors circuit CRW09 (BN/BU) for voltage when wipers are not parked and ground when the wipers are parked.

1. DTC B1447 Wiper Park Sense Circuit Open - Switch input open.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Windshield wiper motor
3. PARK relay
4. RUN/PARK relay
5. SJB module

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1. F1 RETRIEVE THE RECORDED DTCs FROM THE SJB WIPER CONTROL SELF-TEST Use the recorded SJB Wiper Control Self-Test DTCs. Is DTC B1447 present? YES : Go to F9 . NO : Go to F2 .
2. F2 CHECK CIRCUIT SBB09 (RD) FOR VOLTAGE Disconnect: Windshield Wiper Motor C125 Key in ON position. Measure the voltage between wiper motor C125-2, circuit SBB09 (RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to F7 . NO : Go to F3 .
3. F3 CHECK THE WIPER PARK RELAY Disconnect: Windshield Wiper PARK Relay Carry out the Wiper Park Relay Component Test. Refer to COMPONENT TESTING. Did the wiper PARK relay pass the component test? YES : Go to F4 . NO : INSTALL a new wiper PARK relay. TEST the system for normal operation.
4. F4 CHECK CIRCUIT SBB09 (RD) FOR VOLTAGE Measure the voltage between windshield wiper PARK relay pin 30, circuit SBB09 (RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to F5 . NO : VERIFY the battery junction box (BJB) fuse 9 (20A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
5. F5 CHECK CIRCUIT CBP23 (BN/YE) FOR VOLTAGE Measure the voltage between the windshield wiper PARK relay pin 86, circuit CBP23 (BN/YE), harness side and ground. Is the voltage greater than 10 volts? YES : Go to F6 . NO : REPAIR the circuit. TEST the system for normal operation.
6. F6 CHECK CIRCUIT GD121 (BK/YE) FOR GROUND Key in OFF position. Measure the resistance between windshield wiper PARK relay pin 85, circuit GD121 (BK/YE), harness side and ground. Is the resistance less than 5 ohms? YES : REPAIR open in circuit SBB09 (RD). TEST the system for normal operation. NO : REPAIR the circuit. TEST the system for normal operation.
7. F7 CHECK THE WIPER RUN/PARK RELAY Disconnect: Windshield Wiper RUN/PARK Relay Carry out the Wiper Run/Park Relay Component Test. Refer to COMPONENT TESTING. Did the RUN/PARK relay pass the component test? YES : Go to F8 . NO : INSTALL a new RUN/PARK relay. TEST the system for normal operation.
8. F8 CHECK CIRCUIT CRW09 (BN/BU) FOR AN OPEN Key in OFF position. Measure the resistance between the windshield wiper RUN/PARK relay pin 87A, circuit CRW09 (BN/BU), harness side and wiper motor C125-1, circuit CRW09 (BN/BU), harness side. Is the resistance less than 5 ohms? YES : INSTALL a new windshield wiper motor. REFER to «Wiper Motor»(ref-291873-S02943738852008073000000) . NO : REPAIR the circuit. TEST the system for normal operation.
9. F9 CHECK CIRCUIT CRW09 (BN/BU) FOR AN OPEN Key in OFF position. Disconnect: Windshield Wiper Motor C125 Disconnect: SJB C2280a Measure the resistance between SJB C2280a-23, circuit CRW09 (BN/BU), harness side and windshield wiper motor C125-1, circuit CRW09 (BN/BU). Is the resistance less than 5 ohms? YES : If wipers park correctly but DTC B1447 was present, go to F10 . If wipers do not park correctly, INSTALL a new windshield wiper motor. REFER to «Wiper Motor»(ref-291873-S02943738852008073000000) . NO : REPAIR the circuit. TEST the system for normal operation.
10. F10 CHECK FOR CORRECT SJB OPERATION Key in OFF position. 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-291878) article. TEST the system for normal operation. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

The smart junction box (SJB) receives vehicle speed information from the instrument cluster (IC) over the communication network. When any intermittent wiper mode is selected except INT 1, the SJB will gradually increase or decrease the delay between wipes based on vehicle speed.

The speed dependent feature is easiest to verify in the INT 2 position. With the vehicle at a standstill and the multi-function switch in the INT 2 position, the wipers should operate once every 10 seconds. As vehicle speed increases, the delay between wipes will gradually shorten. For example, by the time the vehicle reaches 100 km/h (62 mph), the wipers should operate every 5 seconds. Speed dependent operation is similar in INT 3, INT 4 and INT 5 modes.

This pinpoint test is intended to diagnose the following

1. IC
2. SJB