Wiper System / Washer System (Diagnostics & Circuit Tests): Other Lexus LX J200 рестайлинг

FAIL-SAFE CHART [01/2012 - ]

1. FRONT WIPER SYSTEM When the wiper switch is in any position other than "OFF" and the blades are frozen, a malfunction is detected by the windshield wiper ECU and the wiper operation is stopped. HINT: Recovery condition: the engine switch is turned off. When the rain sensor is broken and the wiper switch is in the AUTO position, the front wiper system is changed to the intermittent mode. HINT: Recovery condition: the signal level error cancellation is received from the rain sensor. When the rain sensor overheats and the front wiper is in the HI operation mode, the front wiper system is changed to the LO operation mode. HINT: Recovery condition: the engine switch is turned off or the wiper switch is turned to any position other than INT or LO. When the windshield wiper ECU malfunctions, the front wiper system can be set to the HI operation mode with the combination switch only. HINT: Recovery condition: the windshield wiper ECU returns to normal.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (FRONT WIPER MOTOR) Using the Techstream, perform the Active Test. NOTE: When a Body No. 5 (windshield wiper ECU) related front wiper switch is on, Active Test items related to the front wiper switch are prohibited (double operation prohibition). Check that the front wiper switches are off before performing Active Test. BODY NO. 5 Item Test Details Control Range Diagnostic Note Wiper Motor HI Wiper motor HI operation ON / OFF - Wiper Motor LO Wiper motor LO operation ON / OFF - OK Front wiper motor operates. NG --> See step 2 OK --> See step 4
2. INSPECT FRONT WIPER MOTOR Remove the front wiper motor. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S10055730742014031100000) . Apply battery voltage to the front wiper motor connector and check the speed of the front wiper motor. OK Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 (+1) Battery negative (-) --> Terminal 5 (E) Motor operates at low speed Battery positive (+) --> Terminal 4 (+2) Battery negative (-) --> Terminal 5 (E) Motor operates at high speed NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (FRONT WIPER MOTOR - WINDSHIELD WIPER ECU AND BODY GROUND) Disconnect the A22 motor connector. Disconnect the E89 ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A22-2 (B) - E89-8 (WIG) Always Below 1 ohms A22-1 (+1) - E89-1 (+1) A22-4 (+2) - E89-2 (+2) A22-3 (+S) - E89-7 (+SM) A22-5 (E) - Body ground A22-3 (+S) - Body ground Always 10 kohms or higher A22-2 (B) - Body ground A22-4 (+2) - Body ground A22-1 (+1) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
4. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [01/2012 - ]»(ref-603956-S17652222372014031100000)
5. REPLACE FRONT WIPER MOTOR. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S10055730742014031100000)
6. REPLACE WINDSHIELD WIPER ECU. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S21401607062014031100000)

1. PERFORM ACTIVE TEST USING TECHSTREAM (REAR WIPER MOTOR) Using the Techstream, perform the Active Test. BODY NO. 4 Item Test Details Control Range Diagnostic Note Rear Wiper Lo Rear wiper motor LO operation ON / OFF - OK Rear wiper motor operates. NG --> See step 2 OK --> See step 5
2. INSPECT REAR WIPER MOTOR Remove the rear wiper motor. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S10055730742014031100000) . Apply battery voltage to the rear wiper motor connector and check if the rear wiper motor operates. OK Measurement Condition Specified Condition Battery positive (+) --> Terminal 3 (+1) Battery negative (-) --> Terminal 4 (E) Motor operates NG --> See step 6 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (REAR WIPER MOTOR - NO. 2 MAIN BODY ECU AND BODY GROUND) Disconnect the S6 motor connector. Disconnect the L33 ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S6-2 (B) - L33-3 (W) Always Below 1 ohms S6-3 (+1) - L33-2 (RWLM) S6-1 (S) - L33-1 (RWSM) S6-4 (E) - Body ground S6-2 (B) - Body ground Always 10 kohms or higher S6-3 (+1) - Body ground S6-1 (S) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
4. REPLACE NO. 2 MAIN BODY ECU. Refer to «REMOVAL [01/2012 - ]»(ref-603919-S42675436862014031100000)
5. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [01/2012 - ]»(ref-603956-S17652222372014031100000)
6. REPLACE REAR WIPER MOTOR. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S10055730742014031100000)

1. READ VALUE USING TECHSTREAM (WINDSHIELD WIPER SWITCH ASSEMBLY) Using the Techstream, read the Data List. BODY NO. 5 Tester Display Measurement Item/Range Normal Condition Diagnostic Note Front Wiper Hi Switch Front wiper HI switch / ON or OFF ON: Front wiper switch in HI position OFF: Wiper switch not in HI position - OK Wiper switch operates. NG --> See step 2 OK --> See step 5
2. INSPECT WINDSHIELD WIPER SWITCH Remove the windshield wiper switch. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S11027412772014031100000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 4 (+2) - 2 (+B) Wiper switch in HI position Below 1 ohms 4 (+2) - 2 (+B) Wiper switch not in HI position 10 kohms or higher NG --> See step 4 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - WINDSHIELD WIPER ECU) Disconnect the E16 switch connector. Disconnect the E89 ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E16-4 (+2) - E89-9 (2S) Always Below 1 ohms E16-2 (+B) - E89-6 (ES) E89-9 (2S) - Body ground Always 10 kohms or higher E89-6 (ES) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
4. REPLACE WINDSHIELD WIPER SWITCH. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S11027412772014031100000)
5. REPLACE WINDSHIELD WIPER ECU. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S21401607062014031100000)

1. INSPECT FUSE (ECU-IG No. 1) Remove the ECU-IG No. 1 fuse from the cowl side junction block LH. Measure the resistance according to the value in the table below. Standard Resistance Tester Connection Condition Specified Condition ECU-IG No. 1 fuse Always Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
2. READ VALUE USING TECHSTREAM (WINDSHIELD WIPER SWITCH) Using the Techstream, read the Data List. BODY NO. 5 Tester Display Measurement Item/Range Normal Condition Diagnostic Note Wiper Lo Switch Front wiper LO switch / ON or OFF ON: Front wiper switch in LO OFF: Front wiper switch not in LO - Wiper Hi Switch Front wiper HI switch / ON or OFF ON: Front wiper switch in HI OFF: Front wiper switch not in HI - Wiper Auto Switch Front wiper AUTO switch / ON or OFF ON: Front wiper switch in AUTO OFF: Front wiper switch not in AUTO - Wiper Mist Switch Front wiper MIST switch / ON or OFF ON: Front wiper switch in MIST OFF: Front wiper switch not in MIST - Washer Switch Front washer switch / ON or OFF ON: Front washer switch on OFF: Front washer switch off - BODY NO. 4 Tester Display Measurement Item/Range Normal Condition Diagnostic Note Rear Wiper Lo Switch Rear wiper LO switch / ON or OFF ON: Rear wiper switch in LO OFF: Rear wiper switch not in LO - Rear Wiper Int Switch Rear wiper INT switch / ON or OFF ON: Rear wiper switch in INT OFF: Rear wiper switch not in INT - Rear Washer Switch Rear washer switch / ON or OFF ON: Rear washer switch on OFF: Rear washer switch off - OK The display is as specified in the normal condition. NG --> See step 3 OK --> See step 4
3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BATTERY AND BODY GROUND) Disconnect the E16 switch connector. Disconnect the E89 ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E16-2 (+B) - E89-6 (ES) Always Below 1 ohms E16-10 (E) - Body ground E16-2 (+B) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
4. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [01/2012 - ]»(ref-603956-S17652222372014031100000)
5. REPLACE WINDSHIELD WIPER SWITCH. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S11027412772014031100000)

1. CHECK WIPER Check the symptoms of the wiper. Check if the causes of the symptoms are any of the following conditions shown in the charts. IT IS RAINING BUT WIPER DOES NOT OPERATE Condition Note Windshield wiper switch in position other than AUTO Wiper only operates at AUTO setting Rain sensor temperature is -10°C (14°F) or less, or 70°C (158°F) or more To prevent improper operation, wiper does not operate when rain sensor temperature is -10°C (14°F) or less To prevent damage to rain sensor, wiper does not operate when outside temperature is 70°C (158°F) or more, or when interior temperature of sensor is 90°C (194°F) or more It is drizzling, or there is scattered rain If rain droplets do not contact rain sensor, or rain droplets are very small, they are not detected IT IS NOT RAINING BUT WIPER OPERATES Condition Note Condensation on windshield Wiper may operate if condensation occurs in rain sensor detection area. If condensation recurs after rain sensor detection area is wiped, wiper operation may continue. Sun rays are strong If sudden changes in light intensity occur, wiper may operate Sudden temperature changes If sudden changes in temperature occur (A/C heater is used in winter, etc.), wiper may operate Object is contacting rain sensor If inner mirror contacts or strikes rain sensor, wiper may operate Windshield wiper switch off by AUTO Wiper operates 1 time after windshield wiper switch is turned off by AUTO WIPER OPERATION IS IRREGULAR Condition Note Wiper blade is deteriorated Windshield surface is oily Rain sensor detects rain amount when wipers are operating. When rain is not completely wiped off by wipers, decrease in ability to detect amount of rain occurs. During scattered rain Heavy rain with large droplets During scattered rain or when rain droplets are large, rain droplets contact the sensor intermittently, causing wiper operation to be irregular During heavy rain, it is difficult for sensor to learn "no rain" condition, causing wiper operation to be irregular Wiper volume is set to minimum Minimum wiper volume setting is designed to be non-sensitive (for users who prefer non-sensitive operation), resulting in irregular wiper operation Problem with wiper motor position signal When wiper motor position signal has chattering, wiper may operate excessively. During auto wiper operation inspection, if wiper operates several times, and replacement of rain sensor does not correct problem, wiper motor may be malfunctioning. OK Causes of symptoms are one or more of above conditions NG --> See step 2 OK --> END
2. CHECK WIPER OPERATION Set the windshield wiper switch to the LO and HI setting, and check that the wipers operate normally. OK Wipers operate normally NG --> See step 11 OK: Go to next step
3. CHECK WINDSHIELD WIPER SWITCH Set the windshield wiper switch to AUTO, and check the problem symptom. RESULT Result Proceed to It is raining but wiper does not operate A It is not raining but wiper operates B B --> See step 10 A: Go to next step
4. CHECK OPERATION OF WIPER Check operation of the wipers. RESULT Result Proceed to Wiper does not operate normally A It is raining but wiper does not operate B B --> See step 10 A: Go to next step
5. CHECK WIPER RUBBER Activate the washer and check the wiping ability of the wiper. OK No residue after wipe NG --> See step 14 OK: Go to next step
6. READ VALUE USING TECHSTREAM (COMBINATION SWITCH) Using the Techstream, read the Data List. BODY NO. 5 Tester Display Measurement Item / Range Normal Condition Diagnostic Note Wiper Auto Switch Front wiper AUTO switch / ON or OFF ON: Front wiper switch in AUTO position OFF: Wiper switch not in AUTO position - OK Windshield wiper switch operates. NG --> See step 16 OK: Go to next step
7. CHECK RAIN SENSOR Check that the rain sensor is installed properly. OK When viewed from outside of vehicle, rain sensor tape is not peeling and has no air bubbles or dust on it, and sensor has not come off bracket NG --> See step 15 OK: Go to next step
8. READ VALUE USING TECHSTREAM (RAIN SENSOR) Using the Techstream, read the Data List. RAIN SENSOR Tester Display Measurement Item/Range Normal Condition Diagnostic Note Rain Sensor Cold Rain sensor cold / COLD or OK COLD: Front wiper switch in AUTO position OK: Wiper switch not in AUTO position - Rain Sensor Hot Rain sensor cold / HOT or OK HOT: Front wiper switch in AUTO position OK: Wiper switch not in AUTO position - OK Rain sensor operates. NG --> See step 12 OK: Go to next step
9. CHECK RAIN SENSOR Set the windshield wiper switch to AUTO. Flatten the end of a cotton swab soaked with water so that it is 4 to 6 mm (0.157 to 0.236 in.) wide. Touch the swab to the rain sensor detection area and check that the wiper LO operation occurs once. STANDARD MEASUREMENT Area Specified Condition A 7 mm (0.276 in.) B 22 mm (0.866 in.) C 16.6 mm (0.654 in.) D 26.6 mm (1.05 in.) E 12 mm (0.472 in.) RESULT Result Proceed to Wiper does not operate A Wiper operates normally B Any other operation C B --> END C --> See step 17 A --> See step 13
10. CHECK RAIN SENSOR Check that the rain sensor is installed properly. OK When viewed from outside of vehicle, rain sensor tape is not peeling and has no air bubbles or dust on it, and sensor has not come off bracket NG --> See step 15 OK --> See step 12
11. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [01/2012 - ]»(ref-603956-S17652222372014031100000)
12. REPLACE RAIN SENSOR. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S15395965092014031100000)
13. REPLACE RAIN SENSOR. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S15395965092014031100000)
14. REPLACE WIPER RUBBER. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S30219212312014031100000)
15. REPLACE RAIN SENSOR TAPE. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S15395965092014031100000)
16. REPLACE WINDSHIELD WIPER SWITCH. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S11027412772014031100000)
17. REPLACE WINDSHIELD WIPER ECU. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S21401607062014031100000)

1. CHECK HEADLIGHT ASSEMBLY (LO BEAM) Check that the headlights illuminate in LO beam. OK Headlights illuminate in LO beam NG --> See step 4 OK: Go to next step
2. INSPECT OUTER MIRROR SWITCH ASSEMBLY Disconnect the E95 cleaner switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 3 (B) - 4 (L) Headlight cleaner switch off 10 kohms or higher 3 (B) - 4 (L) Headlight cleaner switch on Below 1 ohms NG --> See step 6 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - HEADLIGHT CLEANER CONTROL RELAY AND MAIN BODY ECU) Disconnect the relay connector. Disconnect the E95 switch connector. Disconnect the 2D main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (H) - E95-3 (B) Always Below 1 ohms E95-4 (L) - 2D-23 (HRLY) 2 (H) - Body ground Always 10 kohms or higher E95-3 (B) - Body ground E95-4 (L) - Body ground 2D-23 (HRLY) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
4. GO TO LIGHTING SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [01/2012 - ]»(ref-603997-S16272078772014031100000)
5. REPLACE HEADLIGHT CLEANER CONTROL RELAY. Refer to «REMOVAL [01/2012 - ]»(ref-604061-S41493039462014031100000)
6. REPLACE OUTER MIRROR SWITCH ASSEMBLY. Refer to «REMOVAL [01/2012 - ]»(ref-604014-S36327252042014031100000)

1. INSPECT FUSE (ECU-IG No. 1, H-LP CLR) Remove the ECU-IG No. 1 fuse from the cowl side junction block LH. Remove the H-LP CLR fuse from the engine relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ECU-IG No. 1 fuse Always Below 1 ohms H-LP CLR fuse NG --> REPLACE FUSE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - BATTERY AND BODY GROUND) Disconnect the relay connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition 3 (IG) - Body ground Engine switch on (IG) 11 to 14 V 3 (IG) - Body ground Engine switch off Below 1 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 4 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY Remove the headlight cleaner motor. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S38716530182014031100000) . Apply battery voltage to the headlight cleaner motor connector and check the operation of the headlight cleaner motor. OK Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 Battery negative (-) --> Terminal 2 Headlight cleaner motor operation is normal NG --> See step 6 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (CLEANER MOTOR - CONTROL RELAY AND BATTERY) Disconnect the cleaner motor connector. Disconnect the control relay connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 1 - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 - 6 (PB) Always Below 1 ohms 2 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
5. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [01/2012 - ]»(ref-603956-S17652222372014031100000)
6. REPLACE HEADLIGHT CLEANER MOTOR AND PUMP ASSEMBLY. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S38716530182014031100000)

1. INSPECT FRONT WASHER MOTOR Remove the front washer motor. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S14420196422014031100000) . Apply battery voltage to the windshield washer motor connector and check the operation of the windshield washer motor. OK Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 Battery negative (-) --> Terminal 2 Front washer motor operation is normal NG --> See step 8 OK: Go to next step
2. INSPECT REAR WASHER MOTOR Remove the rear washer motor. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S08078547782014031100000) . Apply battery voltage to the windshield washer motor connector and check the operation of the windshield washer motor. OK Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 Battery negative (-) --> Terminal 2 Rear washer motor operation is normal NG --> See step 10 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (FRONT WASHER MOTOR - BATTERY) Disconnect the front washer motor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition 1 - Body ground Engine switch on (IG) 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (REAR WASHER MOTOR - BATTERY) Disconnect the rear washer motor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition 1 - Body ground Engine switch on (IG) 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BODY GROUND) Disconnect the E15 windshield wiper switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E15-2 (EW) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (FRONT WASHER MOTOR - WINDSHIELD WIPER SWITCH) Disconnect the E15 windshield wiper switch connector. Disconnect the washer motor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 - E15-3 (WF) Always Below 1 ohms 2 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (REAR WASHER MOTOR - WINDSHIELD WIPER SWITCH) Disconnect the E16 windshield wiper switch connector. Disconnect the washer motor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 - E16-5 (WR) Always Below 1 ohms 2 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
8. REPLACE FRONT WASHER MOTOR. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S14420196422014031100000)
9. REPLACE WINDSHIELD WIPER SWITCH. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S11027412772014031100000)
10. REPLACE REAR WASHER MOTOR. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S08078547782014031100000)

1. INSPECT FUSE (ECU-IG No. 1) Remove the ECU-IG No. 1 fuse from the cowl side junction block LH. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ECU-IG No. 1 fuse Always Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER ECU - BATTERY AND BODY GROUND) Disconnect the E89 and E90 windshield wiper ECU connectors. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition E89-5 (IG1I) - Body ground Engine switch on (IG) 11 to 14 V E89-5 (IG1I) - Body ground Engine switch off Below 1 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E90-10 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
3. REPLACE WINDSHIELD WIPER ECU. Refer to «REMOVAL [01/2012 - ]»(ref-603941-S21401607062014031100000)