Lexus ES: 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 | 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 rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
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- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (RACK AND PINION POWER STEERING GEAR ASSEMBLY - BODY GROUND) |
(a) Disconnect the C37 rack and pinion power steering gear assembly connector.
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| *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 |
|---|---|---|
| C37-8 (PIG) - Body ground | Always | 9 to 16 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C37-7 (PGND) - Body ground | Always | Below 1 Ω |
| OK | .gif) | REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Steering Angle Sensor Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Steering Angle Sensor Communication Stop Mode Any of the following conditions are met:
Communication stop for "Spiral cable (Steering Angle Sensor)" is indicated on the "Communication Bus Check" screen of the Techstream.
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Because the order of diagnosis is important to allow correct diagnosis, make sure to begin trouble
