Power Window Control System - Diagnosis: Diagnosis Lexus SC II

POWER WINDOW CONTROL SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

1. VEHICLE BROUGHT TO WORKSHOP GO TO NEXT STEP
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See «CUSTOMER PROBLEM ANALYSIS CHECK»(ref-211337-S21407082302005121700000) ) GO TO NEXT STEP
3. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE BODY MULTIPLEX COMMUNICATION SYSTEM (BEAN) Check that there is no abnormality in the communication system by inspecting the communication function of the body multiplex communication system with the hand-held tester. (ECU unconnected, communication line abnormal) Without code output, proceed to A. (ECU unconnected, communication line abnormal) With code output, proceed to B. B: Go to MULTIPLEX COMMUNICATION SYSTEM (See «MULTIPLEX COMMUNICATION SYSTEM»(ref-211363-S34512913252005121600000) ) A: GO TO NEXT STEP
4. DIAGNOSTIC TROUBLE CODE CHECK (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-211337-S34505871492005121700000) ) Check a DTC and note it if a code is output. Delete the DTC. Check if the DTC will be output once again, when the problem symptom is simulated based on the noted code. Without an output of the code, proceed to A. With an output of the code, proceed to B. B: Go to step 7 A: GO TO NEXT STEP
5. PROBLEM SYMPTOMS TABLE (See «PROBLEM SYMPTOMS TABLE»(ref-211337-S40846404412005121700000) ) Without an applicable symptoms table, proceed to A. With an applicable symptoms table, proceed to B. B: Go to step 7 A: GO TO NEXT STEP
6. ACCORDING TO PROBLEM SYMPTOM, PERFORM TROUBLESHOOTING PRE-CHECK (See «pre-check»(ref-211337-S10088972522005121700000) ) TERMINALS OF ECU (See «TERMINALS OF ECU»(ref-211337-S04960968322005121700000) ) GO TO NEXT STEP
7. ADJUST, REPAIR OR REPLACE GO TO NEXT STEP END

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DIAGNOSTIC TROUBLE CODE CHART

DIAGNOSTIC TROUBLE CODE CHART

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1. INSPECT DRIVER DOOR ECU Disconnect the ECU connectors D17, D18 and D19. Check the voltage and continuity of each terminal of the vehicle's side connector. Standard: ECU CONNECTORS VOLTAGE AND CONTINUITY CONDITION REFERENCE Symbols (Terminal No.) Wiring color Condition Specified condition GND (D19-1) <--> Body ground W-B <--> Body ground Constant Continuity CPUB (D19-4) <--> GND (D19-1) L-O <--> W-B Constant 10-14V SIG (D19-5) <--> GND (D19-1) V-W <--> W-B Ignition switch OFF <--> ON 0V <--> 10-14V BDR (D19-6) <--> GND (D19-1) B-R <--> W-B Constant 10-14V DN(D19-2) <--> UP(D19-3) G <--> L Constant Continuity WLSW (D17-9) <--> GND (D19-1) R <--> W-B Ignition switch ON, window lock switch LOCK --> UNLOCK 0V --> 10-14V LMT (D19-10) <--> SGND (D19-11) B-W <--> BR Driver's door glass fully closed --> Opened by 4 mm or more No continuity --> Continuity CTY (D17-27) <--> GND (D19-1) R-W <--> W-B Driver's door fully closed --> Opened No continuity --> Continuity KUL (D18-4) <--> CPSE (D18-20) L-W <--> R-L Driver's door lock cylinder turned into neutral with key --> UNLOCK No continuity --> Continuity KL (D18-13) <--> CPSE (D18-20) L-B <--> R-L Driver's door lock cylinder turned into neutral with key --> LOCK No continuity --> Continuity DT1 (D17-5) <--> SC1 (D17-16) G-R <--> L-R Passenger's switch of power window master switch OFF --> DOWN No continuity (4 kohm) DT1 (D17-5) <--> SC2 (D17-15) G-R <--> Y-R Passenger's switch of power window master switch OFF --> UP No continuity --> Continuity (4 kohm) DT1 (D17-5) <--> SC3(D17-14) G-R <--> L Passenger's switch of power window master switch UP --> UP AUTO, DOWN --> DOWN AUTO No continuity --> Continuity (4 kohm) AUTO (D17-2) <--> GND (D19-1) W-G <--> W-B Passenger's switch of power window master switch UP --> UP AUTO, DOWN --> DOWN AUTO No continuity --> Continuity MUP (D17-23) <--> GND (D19-1) P-L <--> W-B Driver's switch of power window master switch OFF --> UP No continuity --> Continuity MDN (D17-25) <--> GND (D19-1) V <--> W-B Driver's switch of power window master switch OFF --> DOWN No continuity --> Continuity HINT: If the value is not as specified, there may be a malfunction at the vehicle's side. Connect the connector, and inspect the voltage between each terminal of the connector. Standard: ECU CONNECTORS VOLTAGE AND CONTINUITY CONDITION REFERENCE Symbols (Terminal No.) Wiring color Condition Specified condition DN (D19-2) <--> GND (D19-1) G <--> W-B Ignition switch ON, driver's switch of power window master switch OFF --> DOWN 0V --> 10-14V UP (D19-3) <--> GND (D19-1) L <--> W-B Ignition switch ON, driver's switch of power window master switch OFF --> UP WLS1 (D17-20) <--> GND (D19-1) Y-B <--> W-B Ignition switch ON, window lock switch LOCK --> UNLOCK HINT: If the value is not as specified, the driver door ECU or communication line may be defective.
2. INSPECT PASSENGER DOOR ECU Disconnect the door ECU connectors P9, P10 and P11. Inspect the voltage and continuity of each terminal of the vehicle's side connector. Standard: ECU CONNECTORS VOLTAGE AND CONTINUITY CONDITION REFERENCE Symbols (Terminal No.) Wiring color Condition Specified condition GND(P11-1) <--> Body ground W-B <--> Body ground Constant Continuity CPUB(P11-4) <--> GND(P11-1) L-O <--> W-B Constant 10-14V SIG(P11-5) <--> GND(P11-1) V-W <--> W-B Ignition switch OFF --> ON 0V --> 10-14V BDR (P11-6) <--> GND (P11-1) G-Y <--> W-B Constant 10-14V DN(P11-2) <--> UP(P11-3) G <--> L Constant Continuity WLSW (P9-9) <--> GND (P11-1) Y-B <--> W-B Ignition switch ON, window lock switch LOCK --> UNLOCK 0V --> 10-14V LMT(P11-10) <--> SGND(P11-11) B-W <--> BR Driver's door glass fully closed --> Opened by 4 mm or more No continuity --> Continuity CTY (P9-27) <--> GND (P11-1) R-W <--> W-B Driver's door fully closed --> Opened No continuity --> Continuity AUTO (P9-2) <--> GND (P11-1) W-G <--> W-B Passenger's switch of power window master switch UP --> UP AUTO, DOWN --> DOWN AUTO No continuity --> Continuity MUP (P9-23) <--> GND (P11-1) B-W <--> W-B Driver's switch of power window master switch OFF --> UP No continuity --> Continuity MDN (P9-25) <--> GND (P11-1) V <--> W-B Driver's switch of power window master switch OFF --> DOWN No continuity --> Continuity HINT: If the value is not as specified, there may be a malfunction at the vehicle's side. Connect the connector, and inspect the voltage between each terminal of the connector. Standard: ECU CONNECTORS VOLTAGE AND CONTINUITY CONDITION REFERENCE Symbols (Terminal No.) Wiring color Condition Specified condition DN(P11-2) <-->G ND (P11-1) G <--> W-B Ignition switch ON, driver's switch of power window master switch OFF --> DOWN 0V --> 10-14V UP (P11-3) <--> GND (P11-1) L <--> W-B Ignition switch ON, driver's switch of power window master switch OFF --> UP WLS1 (P9-20) <--> GND(P11-1) L-R <--> W-B Ignition switch ON, window lock switch LOCK --> UNLOCK HINT: If the value is not as specified, the passenger door ECU or communication line may be defective.

PROBLEM SYMPTOMS TABLE

PROBLEM SYMPTOMS

CIRCUIT DESCRIPTION

This DTCs are output when the power window motor malfunctions.

DTC B1231 AND DTC B1232 TROUBLE CONDITION

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1. CHECK WIRE HARNESS (ECU <--> POWER WINDOW REGULATOR MOTOR ASSY LH) Disconnect the D19 ECU and P15 power window motor LH connectors. Check the continuity between the connector terminals of the D 19 and P15. Standard: Limit switch LIMIT SWITCH CONTINUITY CONDITIONS REFERENCE Symbols (Terminal No.) Specified condition LMT (D19-10) <--> LMT (P15-2) Continuity SGND (D19-11) <--> E (P15-6) Continuity Pulse sensor PULSE SENSOR CONTINUITY CONDITIONS REFERENCE Symbols (Terminal No.) Specified condition PLS (D19-21) <--> PLS (P15-5) Continuity SGND (D19-11) <--> E (P15-6) Continuity NG: REPAIR OR REPLACE HARNESS CONNECTOR OK: REPLACE POWER WINDOW REGULATOR MOTOR ASSY LH

This DTCs are output when the power window motor malfunctions.

DTC B1233 AND DTC B1234 TROUBLE CONDITIONS

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1. CHECK WIRE HARNESS (ECU <--> POWER WINDOW REGULATOR MOTOR RH) Disconnect the P11 ECU and P16 power window motor RH connectors. Check the continuity between the connector terminals of P11 and P16. Standard: Limit switch LIMIT SWITCH CONTINUITY CONDITIONS REFERENCE Symbols (Terminal No.) Specified condition LMT (P11-10) <--> LMT (P16-2) Continuity SGND(P11-11) <-->E (P16-6) Continuity Pulse sensor PULSE SENSOR CONTINUITY CONDITIONS REFERENCE Symbols (Terminal No.) Specified condition PLS (P11-21) <--> PLS (P16-5) Continuity SGND (P11-11) <--> E (P16-6) Continuity NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: REPLACE POWER WINDOW REGULATOR MOTOR ASSY RH

With the ignition switch ON and the window lock switch NORMAL (except the driver's side), the door ECU monitors a signal via the regulator switch and drives the power window motor.

Note. The power window system has a function with large-scale body multiplex communications. First of all, inspect the communication function depending on the "how to proceed with troubleshooting", and check there is no abnormality in the communication system. Then, finally proceed with the troubleshooting. Also, if the power window system has a malfunction in the jam protection function, the AUTO operations are prohibited. Because of this, confirm that the diagnosis code is normal before the troubleshooting.

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1. CHECK DTC OUTPUT Check that the DTC B1221 is output when power window master switch is operated. HINT: If B1221 is output when the switch is not operated, it is detected the switch sticking. If B1221 is not output when switch is operated, it is detected that the switch contact condition is bad. NG: GO TO FLOW CHART (See «DTC B1221 POWER WINDOW SWITCH CIRCUIT ON DRIVER DOOR»(ref-211337-S18645887992005121700000) ) OK: GO TO NEXT STEP
2. READ VALUE OF HAND-HELD TESTER Check the power window master switch condition by the data monitor. Standard: (Driver door ECU) DRIVER WINDOW SWITCH OPERATION Item Driver window switch operation Hand-held tester indication P/W AUTO SW OFF <--> Operated OFF <--> ON OK to step 5 NG: GO TO NEXT STEP
3. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSY Remove the power window master switch. Check the continuity between the terminals when the power window switch for driver door is operated. Standard: CONTINUITY CONDITIONS REFERENCE Switch position Terminal No. Specified condition Auto-up 6 <--> 20 <--> 16 Continuity Manual-up 6 <--> 20 Continuity Off - No continuity Manual-down 6 <--> 11 Continuity Auto-down 6 <--> 11 <--> 16 Continuity NG: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY OK: GO TO NEXT STEP
4. CHECK WIRE HARNESS (POWER WINDOW MASTER SWITCH <--> ECU) Disconnect the master switch and D17 ECU connectors. Check the continuity between the connector terminals of master switch and ECU. Standard: CONTINUITY CONDITIONS REFERENCE Terminal No. Specified condition P14-6 <--> D17-21 Continuity P14-10 <--> D17-29 P14-16 <--> D17-2 P14-20 <--> D17-23 P14-11 <--> D17-25 NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH
5. PERFORM ACTIVE TEST BY HAND-HELD TESTER Check the power window operation by the active test. Standard: (Driver) CONTINUITY CONDITIONS REFERENCE Item Hand-held tester operation Power window UP/DOWN OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH NG: GO TO NEXT STEP
6. CHECK POWER WINDOW REGULATOR MOTOR ASSY LH NOTE: Be sure not to apply the battery voltage to terminal 2, 5 and 6 of the power window regulator motor assembly LH connector, because it might damage the pulse sensor and the limit switch. Be sure to reset the power window regulator motor assembly (initial position setting of the limit switch) when the power window regulator motor assembly LH is installed to the regulator. Work must be done with the power window regulator and door glass installed to the vehicle. Check that the motor operates smoothly when the battery voltage is applied to each terminal of the connector. Standard: MEASURING OPERATIONAL CONDITIONS REFERENCE Measuring condition Operational direction Battery positive <--> terminal 4 Battery negative <--> terminal 1 Clockwise rotation toward driving axis Battery positive <--> terminal 1 Battery negative <--> terminal 4 Counterclockwise rotation toward driving axis Set the electrical tester and DC400A probe to the wire harness of terminal 1 or 4. SST 09083-00350 Close the door glass fully. Inspection of current cut-off: When approximately 60 seconds has elapsed after the door glass fully closed, check the changing time of the current, from 16 - 34 A into 1 A, when the power window regulator switch turned UP once again. Standard: Approximately 4-90 seconds When approximately 60 seconds has elapsed after the inspection of the current cut-off, check that the door glass goes down when the power window regulator switch turned DOWN. NG: REPLACE POWER MOTOR WINDOW REGULATOR ASSY LH OK: GO TO NEXT STEP
7. CHECK WIRE HARNESS (POWER WINDOW MOTOR LH <--> ECU) Disconnect the motor and D19 ECU connectors. Check the continuity between the connector terminals of motor and ECU. Standard: CONTINUITY CONDITIONS REFERENCE Terminal No. Specified condition P15-2 <--> D19-3 Continuity P15-1 <--> D19-2 NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH

With the ignition switch ON and the window lock switch NORMAL (except the driver's side), the door ECU monitors a signal via the regulator switch and drives the power window motor.

Note. The power window system has a function with large-scale body multiplex communications. First of all, inspect the communication function depending on the "how to proceed with troubleshooting", and check there is no abnormality in the communication system. Then, finally proceed with the troubleshooting. Also, if the power window system has a malfunction in the jam protection function, the AUTO operations are prohibited. Because of this, confirm that the diagnosis code is normal before the troubleshooting.

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1. CHECK DTC OUTPUT Check that the B1223 is output when the power window master switch is operated. HINT: If the B1223 is output when the switch is not operated, it is detected the switch sticking. If the B1223 is not output when switch is operated, it is detected that the switch contact condition is bad. NG: GO TO FLOW CHART (See «DTC B1223 POWER WINDOW SWITCH CIRCUIT ON PASSENGER DOOR»(ref-211337-S11791576362005121700000) ) OK: GO TO NEXT STEP
2. READ VALUE OF HAND-HELD TESTER Check the passenger power window switch condition by the data monitor. Standard: (Passenger door ECU) MEASURING OPERATION CONDITIONS REFERENCE Item Driver window switch operation Hand-held tester indication P/W AUTO SW OFF --> Operated OFF --> ON NG: Go to step 5 OK: GO TO NEXT STEP
3. CHECK POWER WINDOW REGULATOR SWITCH ASSY (PASSENGER) Remove the power window switch. Check the continuity between the terminals when the power window switch for passenger door is operated. Standard: CONTINUITY CONDITIONS REFERENCE Switch position Terminal No. Specified condition UP AUTO 1 <--> 8 <--> 3 Continuity UP MANUAL 1 <--> 8 Continuity OFF - - DOWN MANUAL 6 <--> 8 Continuity DOWN AUTO 3 <--> 8 <--> 6 Continuity NG: REPLACE POWER WINDOW REGULATOR SWITCH ASSY OK: GO TO NEXT STEP
4. CHECK WIRE HARNESS (POWER WINDOW SWITCH <--> ECU) Disconnect the power window switch and P9 ECU connectors. Check the continuity between the connector terminals of the power window switch and ECU. Standard: CONTINUITY CONDITIONS REFERENCE Terminal No. Specified condition P13-8 <--> P9-20 Continuity P13 <--> P9-29 P13-3 <--> P9-2 P13-6 <--> P9-25 P13-1 <--> P9-23 NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT RH
5. PERFORM ACTIVE TEST BY HAND-HELD TESTER Check the power window operation by the active test. Standard: (Passenger) POWER WINDOW OPERATION Item Hand-held tester operation Power window UP/DOWN OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT RH NG: GO TO NEXT STEP
6. CHECK POWER WINDOW REGULATOR MOTOR ASSY RH NOTE: Be sure not to apply the battery voltage to terminal 2, 5 and 6 of the power window regulator motor assembly LH connector, because it might damage the pulse sensor and the limit switch. Be sure to reset the power window regulator motor assembly (initial position setting of the limit switch) when the power window regulator motor assembly LH is installed to the regulator. Work must be done with the power window regulator and door glass installed to the vehicle. Check that the motor operates smoothly when the battery voltage is applied to each terminal of the connector. Standard: MEASURING OPERATIONAL CONDITIONS REFERENCE Measuring condition Operational direction Battery positive <--> terminal 4 Battery negative <--> terminal 1 Clockwise rotation toward driving axis Battery positive <--> terminal 1 Battery negative <--> terminal 4 Counterclockwise rotation toward driving axis Set the electrical tester and DC400A probe to the wire harness of terminal 1 or 4. SST 09082-00040, 09083-00350 Close the door glass fully. Inspection of current cut-off: When approximately 60 seconds has elapsed after the door glass fully closed, check the changing time of the current, from 16 - 34 A into 1 A, when the power window regulator switch turned UP once again. Standard: Approximately 4-90 seconds When approximately 60 seconds has elapsed after the inspection of the current cut-off, check that the door glass goes down when the power window regulator switch turned DOWN. NG: REPLACE POWER MOTOR ASSY RH OK: GO TO NEXT STEP
7. CHECK WIRE HARNESS (POWER WINDOW MOTOR RH <--> ECU) Disconnect the motor and P11 ECU connectors. Check the continuity between the connector terminals of the motor and ECU. Standard: CONTINUITY CONDITIONS REFERENCE Terminal No. Specified condition P16-1 <--> P11-3 Continuity P16-2 <--> P11-2 NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT RH

INSPECTION PROCEDURE

1. INSPECT DOOR LOCK FUNCTION Check that all door lock operate via the driver door key cylinder. NG: GO TO POWER DOOR LOCK CONTROL SYSTEM (See «POWER DOOR LOCK CONTROL SYSTEM»(ref-211346-S09148400832005121700000) ) OK: GO TO NEXT STEP
2. INSPECT POWER WINDOW FUNCTION Check that the power window operates via each power window switch. NG: GO TO FLOW CHART (See «DRIVER POWER WINDOW DOES NOT OPERATE»(ref-211337-S38458214962005121700000) , «POWER WINDOW DOES NOT OPERATE VIA PASSENGER POWER WINDOW SWITCH»(ref-211337-S34311043432005121700000) ) OK: GO TO NEXT STEP
3. INSPECT POWER WINDOW FUNCTION Check that the passenger window operates via the power window master switch. NG: GO TO FLOW CHART (See «PASSENGER WINDOW DOSE NOT OPERATE VIA MASTER SWITCH»(ref-211337-S00862178222005121700000) ) OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH