DESCRIPTION The ECM 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: 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. Click here HINT: The reverse shift-linked function will not activate when the mirror master switch is in the neutral position (off). PROCEDURE
(a) Check that the mirror operates. Click here OK: Mirror operates normally.
(a) Check for DTCs. 3UR-FBE: Click here 3UR-FE: Click here OK: DTCs output does not occur.
(a) Check that the shift position indicator operates. Click here OK: Shift position indicator operates normally.
(a) Check the malfunctioning outer rear view mirror assembly. Click here
(a) Temporarily replace the outer rear view mirror assembly LH with a new or known good one. Click here (b) Check that the reverse shift-linked function operates. Click here OK: Reverse shift-linked function operates normally.
(a) Temporarily replace the outer rear view mirror assembly RH with a new or known good one. Click here (b) Check that the reverse shift-linked function operates. Click here OK: Reverse shift-linked function operates normally.
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Toyota Tundra Service Manual > Power Window Control System(w/ Jam Protection Function): Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART HINT: If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below. Power Window Control System DTC Code Detection Item Suspected Part See page B2311 Power Window Mo ...
