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
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- 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)
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Error in Matching of ECUs (C1567)
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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