Check-list 2. Test for engine when running and vehicle stationary (gearbox neutral) Engine temperature > 30 ° C EDC control unit connected Corrective measures Measure voltage between PIN+ and PIN– with multimeter Check main relay * Pin 46 must switch to U–Batt within 0.5 to 5 seconds after ignition has been switched off. 3. ZDR-Intermediate engine speed control test Wiring harness adapter connected EDC control unit connected Short–circuit Pin 15 and Pin 23 / Pin 41 24 Setpoint Measured value Remark MAN-Cats RPM sensor (DZG) n=lower idle n=..............rpm Min (low.
idle speed) Engine speed (Monitoring 2) n=upper idle n=..............rpm Max (top idle speed) Auxiliary rpm sensor (HZG) n=lower idle n=..............rpm Min (low. idle speed) Engine speed (Monitoring 2) n=upper idle n=..............rpm Max (top idle speed) PIN + PIN – Set-point value [V] Measured value [V] Remark Engine speed MAN-Cats (Monitoring) Control unit supply (U–Batt) 15 47 18 19 U-Batt U-Batt . . . . . . . . . . . . . . . . . . Idle speed Reference voltage 45 33 13 13 4,75–5,25 4,75–5,25 . . . . . . . . . . . . . . . . . . Idle speed Idle speed switch (LGS, NO contact) 4) 39 13 4,75–5,25 0–2,00 . . . . . . . . . . . . . . . . . . Throttle le- ver min. Throttle le- ver max.
Idle speed upper idle Open Closed Charge-air temperature sensor (LTF) 55 13 4,17–2,62 . . . . . . . . . 10–50°C Idle speed 10–50°C Water temperature sensor (WTF) 53 13 3,46–1,22 . . . . . . . . . 30–90°C Idle speed 30–90°C Fuel temperature sensor (WTF) 34 13 4,17–2,62 . . . . . . . . . 10–50°C Idle speed 10–50°C Boost pressure sensor (LDF) 36 13 0,94–1,20 1,10–1,70 . . . . . . . . . . . . . . . . . . Throttle le- ver min. Throttle le- ver max. Idle speed upper idle 0–100 mbar 300–600 mbar PIN+ PIN– Set-point value [V] Measured value [V] Remark Main relay 47 18 U-Batt . . . . . . . . . . . . . . Ignition on 0 V . . . . . . . . . . . . . . Ignition off 46 18 0 V . . . . . . . . . . . . . .
Ignition on U-Batt . . . . . . . . . . . . . . Ignition off Pin 23 [V] Pin 41 [V] Speed ZDR- Pos. Measured value [1/min] 24 0 ZDR- 1 1 . . . . . . . . . . . . 0 24 ZDR- 2 2 . . . . . . . . . . . . 24 24 ZDR- 3 3 . . . . . . . . . . . .