Wiper System & Washer System: Overview Ford Focus II рестайлинг

Principles of Operation

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

If equipped with automatic headlamps, the SJB will illuminate the exterior lamps, including the parking lamps, when the front wipers are on for more than 10 seconds and the headlamp control is in the AUTOLAMP position. When the wipers are turned off, the exterior lamps will remain on for 30 seconds before turning off.

High-Speed Windshield Wipers

When the multi-function switch is set to the HIGH-speed position, it supplies ground to the high/low-speed relay coil and the run/park relay coil, which causes the windshield wiper motor to operate at high speed. During HIGH-speed operation only, both the high/low-speed relay coil ground and the run/park relay coil ground are controlled directly by the multi-function switch. This differs from LOW-speed or INTERMITTENT operation when the run/park relay coil is controlled by the microprocessor. When the switch is placed in the OFF position, the motor continues to operate until the motor returns to the PARK position and the internal Hall-effect sensor senses the motor magnet. The output to the run/park relay then deactivates the relay and disconnects the voltage to the motor.

Since the high/low relay coil and the run/park relay coil are both controlled by a hard-wired circuit to the multi-function switch, the windshield wipers will still operate in high-speed mode if the internal windshield wiper module fails, but will not automatically park when the multi-function switch is turned to the OFF position.

Low-Speed Windshield Wipers

When the multi-function switch is set to the LOW-speed position, it supplies ground to the internal windshield wiper motor module low-speed input and the windshield wiper motor operates at low speed. During LOW-speed operation, the internal run/park relay is activated by the microprocessor and supplies 12 volts to the low-speed brush of the windshield wiper motor. The run/park relay coil ground is controlled by the internal windshield wiper motor module based on inputs received from the multi-function switch. When the switch is placed in the OFF position, the motor continues to operate until the motor returns to the PARK position and the internal Hall-effect sensor senses the motor magnet. The output to the run/park relay then deactivates the relay and disconnects the voltage to the motor.

Since the run/park relay is controlled by the internal windshield wiper motor microprocessor, the wipers will only operate in high-speed mode if the internal windshield wiper motor module fails, and will not automatically park when the multi-function switch is turned to the OFF position. This is due to the run/park and high/low relay coils being directly hard-wired to the switch in high speed. The diode prevents current flow through the high/low relay coil so the relay remains in the normally closed LOW-speed position.

Intermittent-Speed Windshield Wipers

When the multi-function switch is set to the INTERMITTENT position(s), it supplies ground to the windshield wiper motor module inputs and the windshield wiper motor operates in intermittent mode. During INTERMITTENT operation, the windshield wiper motor activates the run/park relay coil which sends voltage through the high/low relay. The high/low relay remains deactivated, supplying the voltage to the low-speed brush of the windshield wiper motor. The windshield motor continues to operate until the internal Hall-effect sensor senses the magnet (PARK position) and deactivates the run/park relay, which disconnects voltage from the wiper motor. The windshield wipers remain parked until the windshield wiper motor module completes a time-out and then repeats the intermittent windshield wiper cycle.

Normal Operation

Under normal operation, the front windshield wiper motor receives power through circuits CBP45 (YE) and SBB10 (YE/RD). The front windshield wiper motor is grounded through circuit GD120 (BK/GN). The multi-function switch is grounded through circuit GD134 (BK/VT). The front windshield wiper motor receives open and ground inputs from the multi-function switch through circuits CRW17 (GN/VT), CRW18 (VT/WH), CRW19 (BU/OG) and CRW08 (VT/OG) to activate the wipers to the appropriate modes. Mode of operation is dependent on the signal(s) received from the multi-function switch.

This pinpoint test is intended to diagnose the following

1. Fuse(s)
2. Wiring, terminals or connectors
3. Multi-function switch
4. Windshield wiper motor

Scheme 1

Scheme 2

Scheme 3

1. A1 CHECK CIRCUITS CBP45 (YE) AND SBB10 (YE/RD) FOR VOLTAGE Key in OFF position. Disconnect: Windshield Wiper Motor C125 Key in ON position. Measure the voltage between windshield wiper motor C125-5, circuit SBB10 (YE/RD), harness side and ground; and between windshield wiper motor C125-8, circuit CBP45 (YE), harness side and ground. Are the voltages greater than 10 volts? YES : Go to A2 . NO : VERIFY the battery junction box (BJB) fuse 10 (30A) and smart junction box (SJB) fuse 45 (5A) are OK. If OK, REPAIR the circuit(s) in question. TEST the system for normal operation.
2. A2 CHECK CIRCUIT GD120 (BK/GN) FOR AN OPEN Key in OFF position. Measure the resistance between windshield wiper motor C125-6, circuit GD120 (BK/GN), harness side and ground; and between windshield wiper motor C125-3, circuit GD120 (BK/GN), harness side and ground. Are the resistances less than 5 ohms? YES : Go to A3 . NO : REPAIR the circuit(s) in question. TEST the system for normal operation.
3. A3 CHECK THE MULTI-FUNCTION SWITCH Disconnect: Multi-Function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to appropriate COMPONENT TESTING article. 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-357145) article.
4. A4 CHECK CIRCUIT GD134 (BK/VT) FOR AN OPEN Measure the resistance between multi-function switch C202-15, circuit GD134 (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 FOR SHORTS IN THE WINDSHIELD WIPER MOTOR HARNESS Measure the resistance at the windshield wiper motor electrical connector between the circuits shown in the table. Windshield Wiper Motor C125 Windshield Wiper Motor C125 Pin 10, circuit CRW19 (BU/OG) Pin 11, circuit CRW18 (VT/WH) Pin 1, circuit CRW08 (VT/OG) Pin 9, circuit CRW17 (GN/VT) Pin 11, circuit CRW18 (VT/WH) Pin 1, circuit CRW08 (VT/OG) Pin 9, circuit CRW17 (GN/VT) Pin 1, circuit CRW08 (VT/OG) Pin 9, circuit CRW17 (GN/VT) Is the resistance greater than 10,000 ohms for all measurements? YES : Go to A6 . NO : REPAIR the circuit. TEST the system for normal operation.
6. A6 CHECK FOR CORRECT WINDSHIELD WIPER MOTOR OPERATION Disconnect all windshield wiper motor connectors. Check for: corrosion. pushed-out pins. Connect all the windshield wiper motor 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 windshield wiper motor. REFER to «Wiper Motor»(ref-357189-S09865340042010030800000) . NO : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

Under normal operation, the windshield wiper motor receives open and ground inputs from the multi-function switch through circuits CRW17 (GN/VT), CRW18 (VT/WH), CRW19 (BU/OG) and CRW08 (VT/OG) to activate the wipers to the appropriate modes. Mode of operation is dependent on the signal(s) received from the multi-function switch.

This pinpoint test is intended to diagnose the following

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

Scheme 4

1. B1 CHECK THE MULTI-FUNCTION SWITCH Key in OFF position. Disconnect: Multi-Function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to appropriate COMPONENT TESTING article. Did the multi-function switch pass the component test? YES : Go to B2 . NO : INSTALL a new multi-function switch. REFER to «STEERING COLUMN SWITCHES»(ref-357145) article.
2. B2 CHECK CIRCUITS CRW19 (BU/OG), CRW18 (VT/WH), CRW08 (VT/OG) AND CRW17 (GN/VT) FOR A SHORT TO GROUND Disconnect: Windshield Wiper Motor C125 Using the following table, measure the resistance between windshield wiper motor C125 harness side and ground: Windshield Wiper Motor C125 Ground Pin 10, circuit CRW19 (BU/OG) Ground Pin 11, circuit CRW18 (VT/WH) Ground Pin 1, circuit CRW08 (VT/OG) Ground Pin 9, circuit CRW17 (GN/VT) Ground Is the resistance greater than 10,000 ohms? YES : Go to B3 . NO : REPAIR the circuit(s) in question. TEST the system for normal operation.
3. B3 CHECK FOR CORRECT WIPER MOTOR OPERATION Disconnect all wiper motor connectors. Check for: corrosion. pushed-out pins. Connect all wiper motor 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 windshield wiper motor. REFER to «Wiper Motor»(ref-357189-S09865340042010030800000) . NO : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

Under normal operation, the windshield wiper motor receives open and ground inputs from the multi-function switch through circuits CRW17 (GN/VT), CRW18 (VT/WH), CRW19 (BU/OG) and CRW08 (VT/OG) to activate the wipers to the appropriate modes. Mode of operation is dependent on the signal(s) received from the multi-function switch.

This pinpoint test is intended to diagnose the following

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

Scheme 5

Scheme 6

1. C1 CHECK THE MULTI-FUNCTION SWITCH Key in OFF position. Disconnect: Multi-Function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to appropriate COMPONENT TESTING article. Did the multi-function switch pass the component test? YES : Go to C2 . NO : INSTALL a new multi-function switch. REFER to «STEERING COLUMN SWITCHES»(ref-357145) article. TEST the system for normal operation.
2. C2 CHECK CIRCUITS CRW19 (BU/OG), CRW08 (VT/OG) AND CRW17 (GN/VT) FOR AN OPEN Disconnect: Windshield Wiper Motor C125 Using the following table, measure the resistance between multi-function switch C202 harness side and windshield wiper motor C125 harness side: Multi-Function Switch C202 Windshield Wiper Motor C125 Pin 16, circuit CRW19 (BU/OG) Pin 10, circuit CRW19 (BU/OG) Pin 9, circuit CRW08 (VT/OG) Pin 1, circuit CRW08 (VT/OG) Pin 12, circuit CRW17 (GN/VT) Pin 9, circuit CRW17 (GN/VT) Is the resistance less than 5 ohms? YES : Go to C3 . NO : REPAIR the circuit(s) in question. TEST the system for normal operation.
3. C3 CHECK CIRCUITS CRW19 (BU/OG), CRW08 (VT/OG) AND CRW17 (GN/VT) FOR A SHORT TO GROUND Using the following table, measure the resistance between windshield wiper motor C125 harness side and ground: Windshield Wiper Motor C125 Ground Pin 10, circuit CRW19 (BU/OG) Ground Pin 1, circuit CRW08 (VT/OG) Ground Pin 9, circuit CRW17 (GN/VT) Ground Is the resistance greater than 10,000 ohms? YES : Go to C4 . NO : REPAIR the circuit(s) in question. TEST the system for normal operation.
4. C4 CHECK FOR SHORTS IN THE WINDSHIELD WIPER MOTOR HARNESS Measure the resistance at the windshield wiper motor electrical connector between the circuits shown in the table. Windshield Wiper Motor C125 Windshield Wiper Motor C125 Pin 10, circuit CRW19 (BU/OG) Pin 11, circuit CRW18 (VT/WH) Pin 1, circuit CRW08 (VT/OG) Pin 9, circuit CRW17 (GN/VT) Pin 11, circuit CRW18 (VT/WH) Pin 1, circuit CRW08 (VT/OG) Pin 9, circuit CRW17 (GN/VT) Pin 1, circuit CRW08 (VT/OG) Pin 9, circuit CRW17 (GN/VT) Is the resistance greater than 10,000 ohms for all measurements? YES : Go to C5 . NO : REPAIR the circuit. TEST the system for normal operation.
5. C5 CHECK FOR CORRECT WIPER MOTOR OPERATION Disconnect all wiper motor connectors. Check for: corrosion. pushed-out pins. Connect all wiper motor 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 windshield wiper motor. REFER to «Wiper Motor»(ref-357189-S09865340042010030800000) . NO : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

Under normal operation, the windshield wiper motor receives open and ground inputs from the multi-function switch through circuits CRW17 (GN/VT), CRW18 (VT/WH), CRW19 (BU/OG) and CRW08 (VT/OG) to activate the wipers to the appropriate modes. Mode of operation is dependent on the signal(s) received from the multi-function switch.

This pinpoint test is intended to diagnose the following

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

Scheme 7

Scheme 8

1. D1 CHECK THE MULTI-FUNCTION SWITCH Key in OFF position. Disconnect: Multi-Function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to appropriate COMPONENT TESTING article. Did the multi-function switch pass the component test? YES : Go to D2 . NO : INSTALL a new multi-function switch. REFER to «STEERING COLUMN SWITCHES»(ref-357145) article. TEST the system for normal operation.
2. D2 CHECK CIRCUITS CRW19 (BU/OG), CRW18 (VT/WH) AND CRW17 (GN/VT) FOR AN OPEN Disconnect: Windshield Wiper Motor C125 Using the following table, measure the resistance between multi-function switch C202 harness side and windshield wiper motor C125 harness side: Multi-Function Switch C202 Windshield Wiper Motor C125 Pin 16, circuit CRW19 (BU/OG) Pin 10, circuit CRW19 (BU/OG) Pin 12, circuit CRW17 (GN/VT) Pin 9, circuit CRW17 (GN/VT) Pin 11, circuit CRW18 (VT/WH) Pin 11, circuit CRW18 (VT/WH) Is the resistance less than 5 ohms? YES : Go to D3 . NO : REPAIR the circuit(s) in question. TEST the system for normal operation.
3. D3 CHECK CIRCUITS CRW19 (BU/OG), CRW18 (VT/WH), AND CRW17 (GN/VT) FOR A SHORT TO GROUND Using the following table, measure the resistance between windshield wiper motor C125 harness side and ground: Windshield Wiper Motor C125 Ground Pin 10, circuit CRW19 (BU/OG) Ground Pin 11, circuit CRW18 (VT/WH) Ground Pin 9, circuit CRW17 (GN/VT) Ground Is the resistance greater than 10,000 ohms? YES : Go to D4 . NO : REPAIR the circuit(s) in question. TEST the system for normal operation.
4. D4 CHECK FOR SHORTS IN THE WINDSHIELD WIPER MOTOR HARNESS Measure the resistance at the windshield wiper motor electrical connector between the circuits shown in the table. Windshield Wiper Motor C125 Windshield Wiper Motor C125 Pin 10, circuit CRW19 (BU/OG) Pin 11, circuit CRW18 (VT/WH) Pin 1, circuit CRW08 (VT/OG) Pin 9, circuit CRW17 (GN/VT) Pin 11, circuit CRW18 (VT/WH) Pin 1, circuit CRW08 (VT/OG) Pin 9, circuit CRW17 (GN/VT) Pin 1, circuit CRW08 (VT/OG) Pin 9, circuit CRW17 (GN/VT) Is the resistance greater than 10,000 ohms for all measurements? YES : Go to D5 . NO : REPAIR the circuit. TEST the system for normal operation.
5. D5 CHECK FOR CORRECT WIPER MOTOR OPERATION Disconnect all wiper motor connectors. Check for: corrosion. pushed-out pins. Connect all wiper motor 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 windshield wiper motor. REFER to «Wiper Motor»(ref-357189-S09865340042010030800000) . NO : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

During normal operation, the windshield wiper motor receives voltage at all times through battery junction box (BJB) fuse 10 (30A), circuit SBB10 (YE/RD). The windshield wiper motor also receives power with the ignition switch in RUN or ACC positions through smart junction box (SJB) fuse 45 (5A), circuit CBP45 (YE). Ground is provided to the windshield wiper motor through circuit GD120 (BK/GN). The run/park and high/low relays are contained in the wiper motor electronics. Mode of operation is dependent on the signal(s) received from the multi-function switch. When the correct input is received from the multi-function switch, the windshield wiper motor activates the washer pump by providing power through circuit CRW14 (BU/WH). Ground is provided to the washer pump through circuit GD120 (BK/GN).

This pinpoint test is intended to diagnose the following

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

Scheme 9

Scheme 10

Scheme 11

Scheme 12

1. E1 CHECK CIRCUIT GD120 (BK/GN) FOR AN OPEN Key in OFF position. Disconnect: Washer Pump Motor C137 Measure the resistance between washer pump motor C137-2, circuit GD120 (BK/GN) harness side and ground. Is the resistance less than 5 ohms? YES : Go to E2 . NO : REPAIR the circuit. TEST the system for normal operation.
2. E2 CHECK CIRCUIT CRW14 (BU/WH) FOR VOLTAGE Key in ON position. Measure the voltage between washer pump motor C137-1, circuit CRW14 (BU/WH) harness side and ground while depressing the multi-function switch to the wash position. Is the voltage greater than 10 volts? YES : INSTALL a new washer pump. REFER to «Washer Pump and Reservoir»(ref-357189-S03657184892010030800000) . NO : Go to E3 .
3. E3 CHECK THE MULTI-FUNCTION SWITCH Key in OFF position. Disconnect: Multi-Function Switch C202 Carry out the Multi-Function Switch Component Test. Refer to appropriate COMPONENT TESTING article. Did the multi-function switch pass the component test? YES : Go to E4 . NO : INSTALL a new multi-function switch. REFER to «STEERING COLUMN SWITCHES»(ref-357145) article.
4. E4 CHECK CIRCUIT CRW07 (GY/BN) FOR AN OPEN Key in OFF position. Disconnect: Windshield Wiper Motor C125 Measure the resistance between windshield wiper motor C125-12, circuit CRW07 (GY/BN), harness side and multi-function switch C202-10, circuit CRW07 (GY/BN), harness side. Is the resistance less than 5 ohms? YES : Go to E5 . NO : REPAIR the circuit. TEST the system for normal operation.
5. E5 CHECK CIRCUIT CRW14 (BU/WH) FOR AN OPEN Measure the resistance between windshield wiper motor C125-7, circuit CRW14 (BU/WH), harness side and washer pump motor C137-1, circuit CRW14 (BU/WH) harness side. Is the resistance less than 5 ohms? YES : Go to E6 . NO : REPAIR the circuit. TEST the system for normal operation.
6. E6 CHECK FOR CORRECT WIPER MOTOR OPERATION Disconnect all wiper motor connectors. Check for: corrosion. pushed-out pins. Connect all wiper motor 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 windshield wiper motor. REFER to «Wiper Motor»(ref-357189-S09865340042010030800000) . NO : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

If equipped with automatic headlamps, the smart junction box (SJB) will illuminate the exterior lamps, including the parking lamps, when the front wipers are on for more than 3 seconds. The SJB monitors the front wiper motor on circuit CRW01 (WH).

1. DTC B2008 Wipers On Signal Circuit Short to Ground - Short to ground on wiper motor on input circuit.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Windshield wiper motor
3. SJB

Scheme 13

Scheme 14

1. F1 CHECK CIRCUIT CRW01 (WH) FOR VOLTAGE Disconnect: Windshield Wiper Motor C125 Key in ON position. Measure the voltage between windshield wiper motor C125-2 circuit CRW01 (WH), harness side and ground. Is the voltage greater than 10 volts? YES : INSTALL a new windshield wiper motor. REFER to «Wiper Motor»(ref-357189-S09865340042010030800000) . TEST the system for normal operation. NO : Go to F2 .
2. F2 CHECK CIRCUIT CRW01 (WH) FOR AN OPEN OR SHORT TO GROUND Key in OFF position. Disconnect: SJB C2280f Measure the resistance between SJB C2280f-8 circuit CRW01 (WH), harness side and windshield wiper motor C125-2 circuit CRW01 (WH); then between SJB C2280f-8 circuit CRW01 (WH), harness side and ground. Is the resistance less than 5 ohms between the SJB and windshield wiper motor and greater than 10,000 ohms between the SJB and ground? YES : Go to F3 . NO : REPAIR the circuit. TEST the system for normal operation.
3. F3 CHECK FOR CORRECT MODULE OPERATION Disconnect all the SJB connectors. Check for: corrosion. pushed-out pins. Connect all the SJB connectors and make sure they are seated 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-357142) article. CLEAR the DTCs. REPEAT the SJB 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.

Scheme 15

Scheme 16

1. For additional information, refer to the appropriate procedures.