Test Boost pressure sensor Flash code: 5x short Fault indication: Fault indicated by steady light at EDC indicator lamp Fault path: Turbo pressure sensor Signal too high Signal too low Signal implausible with atmospheric pressure sensor (in control unit) Effect of fault: Reduced full load delivery volume (engine runs only with intake delivery volume) Possible cause: Line break, short-circuit, boost pressure sensor defective, control unit defective Test precondition: EDC control unit connected Socket box connected “Ignition” switched on 42 Test Measurement Corrective measures Power supply Measure voltage at socket box across pin 36 (+) and pin 13 (–) Setpoint:
4.95–5.05 V – Check lines – Check plug connections – If no fault found, replace con tro l unit Signal voltage PWG Min. 0 % PWG Max. 100 % Measure voltage at socket box across pin 36 (+) and pin 13 (–) Setpoints: Lower idle speed: 0.94–1.20 V Upper idle speed: 1.10–1.70 V See curve on page 19 If all values are OK, the atmos- pheric pressure sensor in the con- trol unit may be defective – Replace control unit