Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: PIG Power Supply Voltage (C1552,C1554)
DESCRIPTION
If a problem occurs in the system, the power source relay circuit and the motor relay circuit are shut off to stop power assist. The ECU must be replaced when there is a problem with the relays because the relays are built into the ECU.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
|---|---|---|---|---|---|---|
| C1552 | PIG Power Supply Voltage | PIG power source circuit malfunction |
| EPS warning light: Comes on | Engine switch on (IG) again | - |
| C1554 | Power Supply Relay Failure | Power source relay circuit malfunction |
| EPS warning light: Comes on | Engine switch on (IG) again | - |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
Click here
.gif)
- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - BODY GROUND) |
(a) Disconnect the J5 power steering ECU assembly connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J5-1 (PIG) - Body ground | Engine switch on (IG) | 9 to 16 V |
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | .gif) | REPLACE POWER STEERING ECU ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
IG Power Supply Voltage (C1551)
DESCRIPTION The power steering ECU assembly distinguishes the engine switch status as on (IG) or off through the IG power source circuit. DTC No. Detection Item DTC Detection Condition Troubl ...
Error in Matching of ECUs (C1567)
DESCRIPTION Based on the steering sensor signal, the power steering ECU assembly determines if the correct type of steering sensor is installed. DTC No. Detection Item DTC Detection Condition ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Tilt And Power Telescopic Steering Column System: ECU Power Source Circuit Malfunction (B2620)
DESCRIPTION The ECU power source circuit supplies positive (+) voltage to the multiplex tilt and telescopic ECU. DTC No. Detection Item DTC Detection Condition Trouble Area B2620 ECU Power Source Circuit Malfunction The voltage of the ECU power source drops to 8 V or less and this c ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Wiper And Washer System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Wiper and Washer System DTC No. Detection Item DTC Detection Condition Link B1245 Lost Communication with Wiper ECU LIN When the battery voltage is 9.5 V or more, a communication malfunction between the main body ECU (multiplex network body ECU) and win ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
0.0089