Lexus NX: On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT STOP LIGHT CONTROL ECU ASSEMBLY
(a) Disconnect the stop light control ECU assembly connector. | | *a | Front view of wire harness connector (to Stop Light Control ECU Assembly) | | |
(b) Measure the voltage and resistance on the wire harness side connector according to the value (s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
A3-4 (ESS1) - A3-8 (GND) | Power switch on (IG) | 11 to 14 V |
A3-6 (+B) - A3-8 (GND) | Power switch off | 11 to 14 V |
A3-9 (ACC) - A3-8 (GND) | Power switch on (IG) | 11 to 14 V |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
A3-8 (GND) - Body ground | Always | Below 1 Ω |
If the result is not as specified, repair or replace the wire harness or connector.
(c) Reconnect the stop light control ECU assembly connector.
(d) Measure the voltage according to the value (s) in the table below. Standard Voltage: Tester Connection | Condition | Specified Condition | A3-1 (OUT) - A3-8 (GND) | Brake pedal not depressed → pressed | Below 0 to 1.5 V → 7.5 to 14 V | A3-5 (STP) - A3-8 (GND) | Brake pedal not depressed → pressed | Below 0 to 1.5 V → 7.5 to 14 V | If the result is not as specified, replace the stop light control ECU assembly. | | *a | Component with harness connected (Stop Light Control ECU Assembly) | | |
READ NEXT:
REMOVAL PROCEDURE 1. REMOVE DOOR SCUFF PLATE ASSEMBLY LH Click here 2. REMOVE COWL SIDE TRIM BOARD LH Click here 3. REMOVE INSTRUMENT SIDE PANEL LH Click here 4. REMOVE NO. 1 INSTRUMENT
INSTALLATION PROCEDURE 1. INSTALL STOP LIGHT CONTROL ECU ASSEMBLY (a) Attach the clamp to install the stop light control ECU assembly. (b) Connect the connector. 2. INSTALL LOWER NO. 1 INSTRUMENT PANE
SEE MORE:
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: Be sure to follow the correct removal and installation procedures of the front seat cushion airbag assembly RH. HINT:
Use the same procedure for RHD and LHD vehicles.
The procedure listed below is for LHD vehicles.
PROCEDURE 1. INSPECT F
DESCRIPTION The main body ECU (multiplex network body ECU) controls the low beam headlights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
Recognition code registration is necessary when replacing
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