Lexus NX: ECU Power Source Circuit
DESCRIPTION
This circuit is the power source circuit to operate the parking assist ECU. The parking assist ECU controls the panoramic view monitor system.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuse for circuits related to this system before performing the following procedure.
HINT:
- If the television camera controller does not operate due to a power source problem, other system DTCs may be stored due to a CAN communication interruption.
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BATTERY AND BODY GROUND) |
| (a) Disconnect the parking assist ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| P44-4 (GND1) - Body ground | Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| P44-1 (+B) - P44-4 (GND1) | Power switch off | 11 to 14 V |
| P44-2 (ACC) - P44-4 (GND1) | Power switch on (ACC) | 11 to 14 V |
| Power switch off | Below 1 V | |
| P44-3 (IG) - P44-4 (GND1) | Power switch on (IG) | 11 to 14 V |
| Power switch off | Below 1 V |
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
.gif)
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Image from Camera for Panoramic View Monitor is Abnormal
DESCRIPTION The display signal from the rear television camera assembly is transmitted to the multi-display assembly via the parking assist ECU. WIRING DIAGRAM w/o Seat Memory w/ Seat Memory CAUTION
Components
COMPONENTS ILLUSTRATION *1 DECK TRIM SIDE PANEL ASSEMBLY RH *2 LUGGAGE HOLD BELT STRIKER ASSEMBLY *3 NO. 1 LUGGAGE COMPARTMENT TRIM HOOK *4 PARKING ASSIST ECU *5 REAR DOOR OP
SEE MORE:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Telematics System DTC No. Detection Item Link U014087 Lost Communication with Body Control Module Missing Message U015587 Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message U016387 Lost Communication
Rain Sensor LIN Communication Malfunction
DESCRIPTION A malfunction occurs in LIN communication of the components related to the rain sensor between the rain sensor and windshield wiper relay assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
When using the Techstream with the power switch off to troubleshoot:
Connect the Techstre
