Lexus ES: IG Power Supply Voltage (C1551)
DESCRIPTION
When a malfunction is detected in the power source circuit, the fail-safe function suspends power assist.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
|---|---|---|---|---|---|---|
| C1551 | IG Power Supply Voltage | When the PIG power supply voltage is normal, the IG power supply voltage is 18.5 V or higher |
| EPS warning light: Comes on | The ECU judges the system has returned to normal | - |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
If the rack and pinion power steering gear 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 (BATTERY - RACK AND PINION POWER STEERING GEAR ASSEMBLY) |
(a) Disconnect the C37 rack and pinion power steering gear assembly connector.
.png)
| *a | Front view of wire harness connector (to Rack and Pinion Power Steering Gear Assembly) | - | - |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C37-4 (IG) - Body ground | Engine switch on (IG) | Below 18.5 V |
| NG | .gif) | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
| 2. | CHECK FOR DTC |
(a) Clear the DTCs.
Chassis > EMPS > Clear DTCs(b) Check for DTCs.
Chassis > EMPS > Trouble Codes| Result | Proceed to |
|---|---|
| DTC is output. | A |
| DTC is not output. | B |
| A | | REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY |
| B | | USE SIMULATION METHOD TO CHECK |
READ NEXT:
PIG Power Supply Voltage (C1552,C1554)
DESCRIPTION When a malfunction is detected in the PIG power source and power supply relay system, the fail-safe function suspends power assist. DTC No. Detection Item DTC Detection Condition
Error in Matching of ECUs (C1567)
DESCRIPTION The power steering ECU (rack and pinion power steering gear assembly) determines whether an incompatible ECM or skid control ECU (brake actuator assembly) is installed based on the identif
Error in Matching of ECUs (C1567)
DESCRIPTION The power steering ECU (rack and pinion power steering gear assembly) determines whether an incompatible ECM or skid control ECU (brake actuator assembly) is installed based on the identif
SEE MORE:
Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Lane Control System (for Gasoline Model)
Inspection
INSPECTION CAUTION / NOTICE / HINT CAUTION: Be careful so that fingers and clothing do not get caught in the moving parts when performing this test. PROCEDURE 1. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY (a) Check the HI operation. (1) Connect a positive (+) lead from the auxiliary battery to termi
