|
The following test steps may or may not be helpful, they are only a proposal.
-
Diagnostic Trouble Codes
- Read and record diagnostic trouble codes including status
- Check for trouble codes with status INTERMITTENT or NOT PRESENT. If a trouble code is stored this may indicate the circuit which has the intermittent condition.
- Move the related connectors, wiring harness and components in order to find the failure. Switch on all electric consumers by turns, because this can cause an electromagnetic interference in a circuit. Use the TECH 31/32 or an oscilloscope to observe the wiring harness for disturbances. Operate the system under different conditions over a considerable time.
-
Quick Check
- Select the following Functional System:
Engine
- Perform the following evaluation:
- Check Additional Information
-
- The following control units can impair the system function:
Transmission System
ABS/TC/ESP (Vehicle Dynamic System)
Immobiliser
-
Instrument
Heating, Ventilation and Air Conditioning System
ECC/SAC (Electronic Climate Control)
-
Engine Cooling
CRC (Electronic Cruise Control)
-
The checking of the corresponding Data List / Actuator Tests may or may not be helpful.
After successful test/fault repair proceed to the next test step
|
|
