PSG16 / P0404 01
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Performance loss.
Cruise control not working.
EGR Valve PWM Signal Circuit. Short to B+.
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Performance loss.
Cruise control not working.
On-board diagnosis
Type of diagnosis:
Enable criteria:
Fault criteria:
| Output short circuit to B+ for more than 0.6 s. |
System reaction to a fault:
| Limp Home, engine torque limitation. |
| EGR and boost pressure control turned off in case of fault. |
| Cruise control switched off. |
Checking the wiring harness
| • | Faults in the control module female connector can be the cause of the DTC. Check the connector with respect to oxidation, depressed pins and pin clamping force. |
| • | Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force. |
Diagnostic help
Diagnosis regards:
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
