Engine Controls System: 122002

122002 - P0034

Information saved in
DME

Fault code
122002 - P0034

Fault text
Bypass blow-off valve, activation: short circuit to ground

Fault description
The diagnostic function monitors the wire to the compressor
bypass valve.

Condition for fault identification
Test condition:
The fault is recognized by the driver circuit's diagnostic
function.
Potential problem source(s):
- Defect in wiring harness between compressor bypass valve
and DME
- Compressor bypass valve defective
- Defective DME
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- none

Condition for fault memory entry
This fault is logged in the control module's fault memory
immediately.

Action in service
- Check wiring harness between compressor bypass valve
and DME
- Replace compressor bypass valve
- Replace DME

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
Power reduction, CC message for engine malfunction

Driver information
Warning light:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: off
- CC message: on
- US emissions warning lamp: off
- US electronic engine power reduction: off
- CC message: on

Service instruction
None