DTC 4-1-6
4-1-6 CHARGE PRESSURE REDUCTION FROM AW 50-42Preconditions for DTC
^ If the leads between the TCM for AW 50-42 and the ECM for Motronic 4.3 SFI/DI is short circuited to ground (low signal) when the ignition is ON and the engine speed is 0 rpm, DTC 4-1-6 is set.
Substitute value
^ None.
Fault sources
^ Signal lead short circuited to ground.
Fault symptoms
^ Poorer performance at engine speeds below 3000 rpm, owing to continuous charge pressure reduction.
TESTING PROCEDURE
Status Message
^ Check current status message.
If Status message is: Permanent fault:
- Proceed to: PERMANENT FAULT section below.
If Status message is: Intermittent fault:
- Proceed to: INTERMITTENT FAULT section below.
PERMANENT FAULT
Check the Signal Lead
^ Check the lead between ECM B42 and TCM B1 for signs of short circuiting to ground.
INTERMITTENT FAULT
Checking the Signal Lead
^ Check the lead between ECM B42 and TCM B1 for signs of intermittent short circuiting to ground.