DESCRIPTION
The combination meter assembly controls the illumination and turning off of the rear turn signal lights.
WIRING DIAGRAM
PROCEDURE
1. | CHECK OPERATION (REAR TURN SIGNAL LIGHTS) |
(a) Check the operation of the rear turn signal lights.
Result | Proceed to |
---|---|
LH side rear turn signal light does not illuminate | A |
RH side rear turn signal light does not illuminate | B |
B | ![]() | GO TO STEP 5 |
|
2. | CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - REAR LIGHT ASSEMBLY LH) |
(a) Disconnect the S31 rear combination light assembly LH connector.
(b) Disconnect the Z21 rear light assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
S31-5 (TRN1) - Z21-4 (TRN4) | Always | Below 1 Ω |
S31-5 (TRN1) or Z21-4 (TRN4) - Body ground | Always | 10 kΩ or higher |
S31-6 (TRN2) - Z21-5 (TRN3) | Always | Below 1 Ω |
S31-6 (TRN2) or Z21-5 (TRN3) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. | CHECK REAR COMBINATION LIGHT ASSEMBLY LH |
(a) Interchange the rear combination light assembly LH with RH and connect the connectors.
w/ Rear No. 2 Seat: Click here
w/o Rear No. 2 Seat: Click here
|
4. | CHECK OPERATION (REAR TURN SIGNAL LIGHTS) |
(a) Check that the rear turn signal light of the rear combination light assembly LH illuminates.
OK:
The rear turn signal light of the rear combination light assembly LH illuminates.
OK | ![]() | REPLACE REAR LIGHT ASSEMBLY LH |
NG | ![]() | REPLACE REAR COMBINATION LIGHT ASSEMBLY LH |
5. | CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - REAR LIGHT ASSEMBLY RH) |
(a) Disconnect the S33 rear combination light assembly RH connector.
(b) Disconnect the Z20 rear light assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
S33-5 (TRN1) - Z20-4 (TRN4) | Always | Below 1 Ω |
S33-5 (TRN1) or Z20-4 (TRN4) - Body ground | Always | 10 kΩ or higher |
S33-6 (TRN2) - Z20-5 (TRN3) | Always | Below 1 Ω |
S33-6 (TRN2) or Z20-5 (TRN3) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. | CHECK REAR COMBINATION LIGHT ASSEMBLY RH |
(a) Interchange the rear combination light assembly RH with LH and connect the connectors.
w/ Rear No. 2 Seat: Click here
w/o Rear No. 2 Seat: Click here
|
7. | CHECK OPERATION (REAR TURN SIGNAL LIGHTS) |
(a) Check that the rear turn signal light of the rear combination light assembly RH illuminates.
OK:
The rear turn signal light of the rear combination light assembly RH illuminates.
OK | ![]() | REPLACE REAR LIGHT ASSEMBLY RH |
NG | ![]() | REPLACE REAR COMBINATION LIGHT ASSEMBLY RH |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting System: Back Door Courtesy Switch Circuit
DESCRIPTION The multiplex network door ECU receives the courtesy light switch signal from the back door lock assembly and transmits it to the main body ECU (multiplex network body ECU) via CAN communication. WIRING DIAGRAM PROCEDURE 1. READ VALUE USING TECHSTREAM (a) Connect the Techstream ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Audio And Visual System (for 12.3 Inch Display): Sending Malfunction (Navigation to APGS) (U0073,U0100,U0129,U0140,U0155,U0164,U023B,U0265,U1110)
DESCRIPTION These DTCs are stored when a malfunction occurs in the CAN communication circuit. DTC No. Detection Item DTC Detection Condition Trouble Area U0073 Sending Malfunction (Navigation to APGS) CAN bus connection error CAN communication system U0100 Engine ECU Communi ...