After run test conditions
Ignition switch : "ON" → "OFF".
Engine rpm is within set value.
Actual vehicle speed is below the set value.
Rail pressure sensor and vehicle speed sensor is OK.
Possible DTC: P1653
When energizing time is "0" after run test mode, if engine rpm is not below the set value within set time , error is detected.
When injector power stage is shut off, if engine rpm is not below the set time within set time, error is detected.
Possible causes of trouble :
Open circuit in wiring, or Short circuit Poor connection ECU |
Several tests are implemented in ECU after switching off the Ignition.
This fault entry occurs if ECU detects any faults during these tests.
Start by rectifying any other stored faults.
Then cancel the fault memory and perform the test drive.
Measure the supply voltage at ECU pin 114 (Cylinder #1 injector), pin 119 (Cylinder # 4 injector) to ECU Pin 117 and ECU pin 120 (Cylinder # 3 injector), pin 121 (Cylinder # 2 injector) to ECU Pin 118 with ignition off.
Set value : 0V
Check wiring if set value is not attained.
If wiring is OK , replace ECU.
