DTC P1543
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P1543: Engine Oil Pressure Sensor / Switch “1” / “2” Voltage Correlation Oil pressure switch-1 signal voltage is at low level and oil pressure switch-2 signal voltage is at high level. (1 D/C detection logic) |
•Oil pressure switch-1 and/or its circuit
•Oil pressure switch-2 and/or its circuit •ECM |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | B1: | Oil pressure switch-1 signal circuit | 2. | VDOP solenoid valve |
| A1: | VDOP solenoid valve power supply circuit | C1: | Oil pressure switch-2 signal circuit | 3. | Oil pressure switch-1 |
| A2: | VDOP solenoid valve drive circuit | 1. | ECM | 4. | Oil pressure switch-2 |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
Oil pressure switch-1 signal circuit check
1)Set ignition “OFF” and disconnect “D01” connector from ECM and oil pressure switch-1 connector.
2)Check for proper terminal connection to “D01” connector and oil pressure switch-1 connector.
3)If connections are OK, check the following points.
•Resistance of “B1” circuit: less than 1 Ω
•Resistance between “B1” and ground: infinity •Voltage of “B1” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
Oil pressure switch-1 check
1)Check oil pressure switch-1.
Is check result OK?
|
Go to Step 4.
|
Replace oil pressure switch-1.
|
| 4 |
Oil pressure switch-2 signal circuit check
1)Check oil pressure switch-2 signal circuit according to Step 2 of DTC P1541:D16AA.
Is check result OK?
|
Go to Step 5.
|
Repair or replace defective wire harness.
|
| 5 |
Oil pressure switch-2 check
1)Check oil pressure switch-2.
Is check result OK?
|
Replace ECM and recheck DTC.
|
Replace oil pressure switch-2.
|