Lexus NX: Open in IG Circuit (B242E)
DESCRIPTION
This DTC is output when there is a problem in the power supply for the headlight ECU sub-assembly RH.
The headlight ECU sub-assembly LH outputs DTC B242E.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B242E | Open in IG Circuit | IG circuit malfunction in the headlight ECU sub-assembly LH and headlight ECU sub-assembly RH |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Clear the DTCs.
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(b) Turn the power switch on (IG).
(c) Check for DTCs.
Click here
OK:
DTC B242E output does not occur
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
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| 2. | CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY RH - BATTERY AND BODY GROUND) |
| (a) Disconnect the headlight ECU sub-assembly RH connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| A20-4 (IG) - Body ground | Power switch off | Below 1 V |
| A20-4 (IG) - Body ground | Power switch on (IG) | 11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A20-12 (GND) - Body ground | Always | Below 1 Ω |
| OK | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Left Low Beam Fan Malfunction (B243D,B243E)
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Installation
INSTALLATION PROCEDURE 1. INSTALL HV WATER PUMP BRACKET SUB-ASSEMBLY (a) Temporarily install the HV water pump bracket sub-assembly to the inverter bracket with bolt A. *a Bolt A *b Bolt B (b) Install bolt B. Torque: 10 N·m {102 kgf·cm, 7 ft·lbf} (c) Tighten bolt
Problem Symptoms Table
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 suspect
