Lexus NX: Reverse Shift-linked Function of Power Mirrors does not Operate
DESCRIPTION
Hybrid vehicle control ECU sends the reverse signal to the main body ECU (multiplex network body ECU) via CAN communication. When receiving the reverse signal, the main body ECU (multiplex network body ECU) sends the reverse request signal to each outer mirror control ECU assembly. Each outer mirror control ECU assembly then performs control in response to the reverse signal.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this problem.
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If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.
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HINT:
The reverse shift-linked function will not activate when the mirror select switch is in the neutral position (off).
PROCEDURE
| 1. | CHECK OUTER REAR VIEW MIRROR ASSEMBLY FUNCTION (MEMORY AND REACTIVATION OPERATION) |
(a) Check that the memory and reactivation function operates.
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OK:
Memory and reactivation function operates normally.
| NG | .gif) | GO TO OTHER FLOWCHART (Power Mirror Surface Position is not Memorized) |
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| 2. | CHECK FOR DTC (HYBRID CONTROL SYSTEM) |
(a) Check for DTCs.
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OK:
DTCs output does not occur.
| NG | | GO TO HYBRID CONTROL SYSTEM |
|
| 3. | CHECK SHIFT POSITION INDICATOR FUNCTION |
(a) Check that the shift position indicator operates.
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OK:
Shift position indicator operates normally.
| NG | | GO TO METER / GAUGE SYSTEM |
|
| 4. | CONFIRM MALFUNCTIONING PARTS |
(a) Check the malfunctioning outer rear view mirror assembly.
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| Result | Proceed to |
|---|---|
| Both the left and right outer rear view mirror assembly do not operate | A |
| Outer rear view mirror assembly LH does not operate | B |
| Outer rear view mirror assembly RH does not operate | C |
| A | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| C | | GO TO STEP 6 |
|
| 5. | CHECK OUTER REAR VIEW MIRROR ASSEMBLY LH |
(a) Temporarily replace the outer rear view mirror assembly LH with a new or normally functioning one.
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(b) Check that the reverse shift-linked function operates.
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OK:
Reverse shift-linked function operates normally.
| OK | | END (OUTER REAR VIEW MIRROR ASSEMBLY LH IS DEFECTIVE) |
| NG | | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH |
| 6. | CHECK OUTER REAR VIEW MIRROR ASSEMBLY RH |
(a) Temporarily replace the outer rear view mirror assembly RH with a new or normally functioning one.
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(b) Check that the reverse shift-linked function operates.
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OK:
Reverse shift-linked function operates normally.
| OK | | END (OUTER REAR VIEW MIRROR ASSEMBLY RH IS DEFECTIVE) |
| NG | | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH |
READ NEXT:
Parts Location
PARTS LOCATION ILLUSTRATION *1 OUTER REAR VIEW MIRROR ASSEMBLY LH *2 OUTER REAR VIEW MIRROR ASSEMBLY RH *3 OUTER MIRROR LH *4 OUTER MIRROR RH *5 NO. 2 ENGINE ROOM RELAY BLOCK
System Diagram
SYSTEM DIAGRAM Power Mirror Control System Mirror Heater System
SEE MORE:
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT SHIFT LEVER ASSEMBLY (a) Inspect shift lock operation. (1) Move the shift lever to P. (2) Turn the power switch off. (3) Check that the shift lever cannot be moved from P to any other position. (4) Turn the power switch on (READY), depress the brake pedal,
Terminals Of Ecu
TERMINALS OF ECU REAR TELEVISION CAMERA ASSEMBLY (a) Disconnect the Y25 rear television camera assembly connector. (b) Measure the voltage on the wire harness side connector according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Sp
