DTC P1540
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P1540: VDOP Solenoid Valve Circuit Range / Performance Any of the following conditions is met.
•VDOP solenoid valve drive circuit is open. (1 D/C detection logic)•VDOP solenoid valve drive circuit is short to power supply. •VDOP solenoid valve drive circuit is short to ground. •Temperature of VDOP solenoid valve drive circuit is out of specified range. |
•VDOP solenoid valve and/or its circuit
•ECM |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | A2: | VDOP solenoid valve drive circuit | 2. | VDOP solenoid valve |
| A1: | VDOP solenoid valve power supply circuit | 1. | ECM |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
VDOP solenoid valve power supply circuit check
1)Set ignition “OFF” and disconnect VDOP solenoid valve connector.
2)Check for proper terminal connection to VDOP solenoid valve connector.
3)If connections are OK, set ignition “ON”.
4)Check that voltage between “A1” circuit and ground is battery voltage.
Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
VDOP solenoid valve drive circuit check
1)Set ignition “OFF” and disconnect “E01” connector from ECM.
2)Check for proper terminal connection to “E01” connector.
3)If connections are OK, check the following points.
•Resistance of “A2” circuit: less than 1 Ω
•Resistance between “A2” and ground: infinity •Resistance between “A2” circuit terminal and other terminal at VDOP solenoid valve connector: infinity •Voltage of “A2” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 4.
|
Repair or replace defective wire harness.
|
| 4 |
VDOP solenoid valve check
1)Check VDOP solenoid valve.
Is check result OK?
|
Replace ECM and recheck DTC.
|
Replace VDOP solenoid valve.
|