Power Window Control System - Diagnosis: Other Lexus SC II

PRE-CHECK

1. INSPECT POWER WINDOW OPERATION HINT: The initial condition that the customizing function by the hand-held tester is not chosen is shown. Standard: POWER WINDOW OPERATION CHART Power window operation Ignition switch ON Ignition switch OFF Operative after key-OFF Ignition switch OFF Inoperative after key-OFF Manual UP Operative Jam protection function operative Inoperative Manual DOWN Operative Operative Inoperative AUTO UP Jam protection function operative Jam protection function operative Inoperative AUTO DOWN Operative Operative Inoperative UP interlocked with key operation Inoperative Jam protection function operative Jam protection function operative DOWN interlocked with key operation Inoperative Operative Operative UP interlocked with wireless operation Inoperative Inoperative Inoperative DOWN interlocked with wireless operation Inoperative Operative Operative
2. 2: INSPECT POWER WINDOW FAIL-SAFE FUNCTION When an abnormality is detected in the limit switch and pulse sensor for operating the jam protection function (DTC: B1231/31, B1232/32, B1233/33, B1234/34), the following power window operations will be prohibited for fail-safe. Standard: POWER WINDOW OPERATION CHART Power window operation Ignition switch ON Ignition switch OFF Operative after key-OFF Ignition switch OFF Inoperative after key-OFF Manual UP Operative Operation prohibited - Manual DOWN Operative Operation prohibited - AUTO UP Operation prohibited Operation prohibited - AUTO DOWN Operation prohibited Operation prohibited - UP interlocked with key operation - Operation prohibited Operation prohibited DOWN interlocked with key operation - Operation prohibited Operation prohibited UP interlocked with wireless operation - Operation prohibited Operation prohibited DOWN interlocked with wireless operation - Operation prohibited Operation prohibited HINT: In case of normal limit switch, prohibition (fail-safe function) will be cancelled by fully opening the door glass or fully-closed by manual operation then AUTO operation will be possible.
3. INSPECT ECU DATA MONITOR WITH HAND-HELD TESTER Check the driver (D) and passenger (P) door ECU condition by the ECU data monitor. Standard: D-Door ECU D-DOOR ECU DIAGNOSTIC CHART Item Inspecting condition Standard value Driver's side power window AUTO switch Pressed --> Not pressed ON/OFF Jam protection limit switch Power window full-open --> full-closed ON / OFF Passenger's side power window remote AUTO Pressed --> Not pressed ON / OFF P-Door ECU P-DOOR ECU DIAGNOSTIC CHART Item Inspecting condition Standard value Passenger's side power window AUTO switch Pressed --> Not pressed ON/OFF Jam protection limit switch Power window full-open --> full-closed ON / OFF D and P-Door ECU (Jam protection threshold) D AND P-DOOR ECU (JAM PROTECTION THRESHOLD) DIAGNOSTIC CHART Item Inspecting condition Standard value Window full-closed position --> 1 / 4 open position Power window is going UP by manual operation OK/CAUTION* Window 1 / 4 open position --> 2 / 4 open position Power window is going UP by manual operation OK/CAUTION* Window 2 / 4 open position --> 3 / 4 open position Power window is going UP by manual operation OK/CAUTION* Window 3/4 open position --> full-open position Power window is going UP by manual operation OK/CAUTION* HINT: *: CAUTION is indicated when something caught in the window is detected.
4. INSPECT ACTIVE TEST WITH HAND-HELD TESTER Check the driver's and passenger's power window operation by the active test. Standard: D and P-Door ECU D AND P-DOOR ECU DIAGNOSTIC CHART Item Operation Power window UP/DOWN
5. INSPECT CUSTOMIZING FUNCTION (REFERENCE): Select the following controls on the power window control system. Standard: D-Door ECU D-DOOR ECU DIAGNOSTIC CHART Item Setting Power window UP interlocked with door operation With/Without function Power window DOWN interlocked with door operation With / Without function

CIRCUIT DISCRETION

This DTC is output when any switch of the power window regulator master switch is operated.

HINT

1. If this DTC is output when the switch is not operated, it is detected the switch sticking.
2. If this DTC is not output when switch is operated, it is detected that the switch contact condition is bad.

DTC 1221 TROUBLE CONDITIONS

Scheme 19

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1. 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 Check the continuity between the terminals when the door control switch is operated. Standard: CONTINUITY CONDITIONS REFERENCE Switch position Terminal No. Specified condition Lock 8 <--> 10 Continuity Off - No continuity Unlock 18 <--> 10 Continuity NG: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH

This DTC is output when the power window regulator switch or door control switch is operated.

DTC B1223 TROUBLE CONDITIONS

HINT

1. If this DTC is output when the switch is not operated, it is detected the switch sticking.
2. If this DTC is not output when switch is operated, it is detected that the switch contact condition is bad.

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1. CHECK POWER WINDOW REGULATOR SWITCH ASSY Disconnect the power window switch connector on the passenger door. Check the continuity between the terminals when the power window switch is operated. Standard: CONTINUITY CONDITIONS REFERENCE Switch position Terminal No. Specified condition Auto-up 1 <--> 8 <--> Continuity Manual-up 1 <--> 8 Continuity Off - No continuity Manual-down 6 <--> 8 Continuity Auto-down 3 <--> 8 <--> 6 Continuity NG: REPLACE POWER WINDOW REGULATOR SWITCH ASSY OK: GO TO NEXT STEP
2. CHECK DOOR CONTROL SWITCH ASSY Disconnect the door control switch connector on the passenger door. Check the continuity of each terminal of the connector, when each switch is operated, as shown in the table. Standard: CONTINUITY CONDITIONS REFERENCE Switch position Terminal No. Specified condition Lock 2 <--> 3 Continuity Off - No continuity Unlock 1 <--> 2 Continuity NG: REPLACE DOOR CONTROL SWITCH ASSY OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT RH

When the ignition switch is ON, the master switch (door ECU) send a remote switch signal for the passenger's seat to the passenger door ECU. Then the passenger door ECU drives the power window motor for the passenger seat.

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: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT RH 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 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 P14-3 <--> D17-5 Continuity P14-13 <--> D17-16 P14-14 <--> D17-15 P14-15 <--> D17-14 NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH

When the driver's door is held in the locked state for 1.5 seconds or more via the key operation with no key inserted in the ignition switch, the driver door ECU drives the power window motor at the same time when a signal is transmitted to the passenger door ECU. And then, the passenger door ECU 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.

Unless the driver's door is opened then closed within 43 seconds after the ignition switch is turned to OFF from ON, the driver door ECU supplies the power source to the master switch at the same time when a signal is transmitted to the passenger door ECU. And then, the passenger door ECU supplies the power to the regulator switch.

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.

1. 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 WINDOWS WITCH»(ref-211337-S34311043432005121700000) ) OK: GO TO NEXT STEP
2. 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