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:
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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 |
Vehicle Speed Signal (C1541)
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