Power Mirror Control (W/o Memory) (Diagnostics): Diagnosis Lexus HS I

PROBLEM SYMPTOMS TABLE

HINT

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

POWER MIRROR CONTROL SYSTEM

Scheme 76

Scheme 77

1. CHECK A/C AMPLIFIER ASSEMBLY Disconnect the F47 A/C amplifier assembly connector. Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Tester Connection Wiring Color Terminal Description Condition Specified Condition F47-1 (IG+) - F47-14 (GND) W - W-B Power source (IG) Power switch on (IG) 11 to 14 V F47-1 (IG+) - F47-14 (GND) W - W-B Power source (IG) Power switch off Below 1 V F47-21 (B) - F47-14 (GND) GR - W-B ECU power supply Always 11 to 14 V F47-14 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the F47 A/C amplifier assembly connector. Measure the voltage according to the value(s) in the table below. Tester Connection Wiring Color Terminal Description Condition Specified Condition F47-20 (HRLY) - F47-14 (GND) G - W-B Mirror heater switch signal Power switch on (IG), rear window defogger switch off 11 to 14 V F47-20 (HRLY) - F47-14 (GND) G - W-B Mirror heater switch signal Power switch on (IG), rear window defogger switch on Below 1 V If the result is not as specified, the A/C amplifier assembly may have a malfunction.
2. INTEGRATION CONTROL & PANEL ASSEMBLY Disconnect the F73 A/C control panel assembly connector. Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Tester Connection Wiring Color Terminal Description Condition Specified Condition F73-9 (IG+) - Body ground P - Body ground Power switch signal Power switch on (IG) 11 to 14 V F73-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the F73 A/C control panel assembly connector. Check for pulses according to the value(s) in the table below. Tester Connection Wiring Color Terminal Description Condition Specified Condition F73-11 (LIN) - Body ground L - Body ground LIN communication signal Power switch on (IG) Pulse generation If the result is not as specified, the A/C control panel assembly may have a malfunction.

DIAGNOSIS SYSTEM

1. DESCRIPTION Data of the system can be read from the Data Link Connector 3 (DLC3) of the vehicle. Therefore, when the system seems to be malfunctioning, use the Techstream to check for a malfunction and repair it.
2. CHECK DLC3 Check the DLC3. Refer to «GENERAL INFORMATION»(ref-398089-S21707799022011051600000) .

DATA LIST / ACTIVE TEST

1. ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / Active Test. Perform the Active Test according to the display on the Techstream. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Mirror Heater Relay Mirror Heater ON/OFF

INSPECTION PROCEDURE

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 78

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1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical /Air Conditioner / Active Test. Perform an Active Test according to the display on the Techstream. AIR CONDITIONER Tester Display Test Part Control Range Diagnostic Note Mirror Heater Relay Mirror heater ON / OFF - Result Result Proceed to Mirror heater operations on both mirrors are not normal A Mirror heater operation on RH side mirror is not normal B Mirror heater operation on LH side mirror is not normal C C --> See step 10 B --> See step 8 A: Go to next step
2. CHECK DEFOGGER SYSTEM Check the rear window defogger operation. OK The rear window defogger operates normally. NG --> See step 12 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BODY GROUND) Disconnect the 1H and 1G connectors from the integration relay. Measure the resistance according to the value(s) in the table below Standard Resistance Tester Connection Condition Specified Condition 1H-3 (GND2) - Body ground Always Below 1 ohms 1G-22 (GND1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - BODY GROUND) OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - INTEGRATION RELAY) Disconnect 1I connector from the integration relay. Disconnect the H10 connector from the outer rear view mirror assembly RH. Measure the resistance according to the value(s) in the table below Standard Resistance Tester Connection Condition Specified Condition 1I-2 (MHTR) - H10-4 (+) Always Below 1 ohms 1I-2 (MHTR) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - INTEGRATION RELAY) OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - INTEGRATION RELAY) Disconnect the I10 outer rear view mirror assembly LH connector. Measure the resistance according to the value(s) in the table below Standard Resistance Tester Connection Condition Specified Condition 1I-2 (MHTR) - I10-4 (+) Always Below 1 ohms 1I-2 (MHTR) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - INTEGRATION RELAY) OK: Go to next step
6. REPLACE INTEGRATION RELAY Replace the integration relay. Refer to «REMOVAL»(ref-398241-S11401503782011051600000) . NEXT: Go to next step
7. CHECK MIRROR HEATER SYSTEM Check the mirror heater system. OK Mirror heater system is normal. NG --> See step 13 OK --> END (INTEGRATION RELAY WAS DEFECTIVE)
8. CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - BODY GROUND) Disconnect the H10 connector from the outer rear view mirror assembly RH. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H10-12 (-) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - BODY GROUND) OK: Go to next step
9. CHECK OUTER REAR VIEW MIRROR ASSEMBLY RH Remove the outer rear view mirror assembly RH. Refer to «REMOVAL»(ref-398326-S29806830652011051600000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H10-4 (+) - H10-12 (-) 25°C (77°F) 7.6 to 11.4 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Outer Rear View Mirror Assembly RH) NG --> See step 14 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - OUTER REAR VIEW MIRROR ASSEMBLY RH)
10. CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - BODY GROUND) Disconnect the I10 connector from the outer rear view mirror assembly LH. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I10-12 (-) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - BODY GROUND) OK: Go to next step
11. CHECK OUTER REAR VIEW MIRROR ASSEMBLY LH Remove the outer rear view mirror assembly LH. Refer to «REMOVAL»(ref-398326-S29806830652011051600000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I10-4 (+) - I10-12 (-) 25°C (77°F) 7.6 to 11.4 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Outer Rear View Mirror Assembly LH) NG --> See step 15 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - OUTER REAR VIEW MIRROR ASSEMBLY LH)
12. GO TO WINDOW DEFOGGER SYSTEM. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398351-S39983481252011051600000)
13. REPLACE A/C AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398224-S23203152222011051600000)
14. REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH (FRONT PASSENGER SIDE). Refer to «REMOVAL»(ref-398326-S29806830652011051600000)
15. REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH (DRIVER SIDE). Refer to «REMOVAL»(ref-398326-S29806830652011051600000)