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 | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
---|---|---|---|---|---|---|
C1551 | IG Power Supply Voltage | Open or short in IG power source circuit with engine switch on (IG) |
| EPS warning light: Comes on | The ECU judges the system has returned to normal or the power switch is turned on (IG) again | - |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. | CHECK HARNESS AND CONNECTOR (BATTERY - POWER STEERING ECU ASSEMBLY) |
(a) Disconnect the J5 and J4 power steering ECU assembly connectors.
*a | Front view of wire harness connector (to Power Steering ECU Assembly) | - | - |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
J4-1 (IG) - Body ground | Engine switch on (IG) | 8 to 16 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J5-2 (PGND) - Body ground | Always | Below 1 Ω |
OK | ![]() | REPLACE POWER STEERING ECU ASSEMBLY |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Sfi System: Throttle/Pedal Position Sensor/Switch "D" Circuit Voltage Out of Range (P21201C,P212099)
DESCRIPTION Refer to DTC P212012. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P21201C Throttle/Pedal Position Sensor/Switch "D" Circuit Voltage Out of Range Difference between VPA and VPA2 is greater than or equal to the specified v ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Rear Power Seat Control System(for Second Row): Folding Motor Circuit
DESCRIPTION HINT:
The rear power seat switch is a collective term for the rear power seat switch RH and the rear power seat switch LH.
The rear seatback frame sub-assembly is a collective term for the rear seatback frame sub-assembly RH and the rear seatback frame sub-assembly LH.
The fold s ...