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 |
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| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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