List of checking procedures List of checking procedures for EDC M(S) 5 stage 3 1. Checks while engine is stationary (Ignition off, control unit not connected) Engine temperature approx. 25 ° C Control unit not (!!!) connected, cable harness adapter connected Measure resistance between PIN+ and PIN– with multimeter 1) Exact measurements are possible only at defined temperatures. 2) Resistance approx. 230 – 460 W with engine at operating temperature (approx. 80 ° C) 3) Since August 97 new speed pick-ups DG6 (51.27120-0008/ -0009) have been in- stalled.
Their electrical resistance differs from that of the old speed pick-ups DG2 (51.27120-0005/-0006), but they are otherwise identical in function. 26 PIN+ PIN– Set-point value Measured value Control rod position transducer1) (Rack travel sensor) 11 9 18 – 25 Ω . . . . . . . . . . . . . . . . Ω 11 10 18 – 25 Ω . . . . . . . . . . . . . . . . Ω 18 9 >10 MΩ . . . . . . . . . . . . . . . . ΜΩ 18 10 >10 M Ω . . . . . . . . . . . . . . . . ΜΩ RPM sensor (DZG) 3) -0005 -0008 21 13 0.5 – 0,7 kΩ . . . . . . . . . . . . . . . . kΩ 0.8 – 1,0 kΩ . . . . . . . . . . . . . . . . kΩ Auxiliary rpm sensor 3) -0006 (HZG) -0009 22 17 0.5 – 0,7 kΩ . . . . . . . . . . . . . . . . kΩ 0.8 – 1,0 kΩ . . . . . . . . .
. . . . . . . kΩ Fuel-delivery regulator 15 1 0,7 – 1,3 Ω . . . . . . . . . . . . . . . . Ω 18 1 >10MΩ . . . . . . . . . . . . . . . . ΜΩ 16 2 0,7 – 1,3 Ω . . . . . . . . . . . . . . . . Ω Ground 13 18 >10 MΩ . . . . . . . . . . . . . . . . ΜΩ 17 19 >10 MΩ . . . . . . . . . . . . . . . . ΜΩ EHAB 14 19 30 – 70 Ω . . . . . . . . . . . . . . . . Ω The following checks may be carried out in addition to the voltage measurements (see below). Coolant temperature sensor 53 13 1,3 – 3,6 kΩ 2) . . . . . . . . . . . . . . . . kΩ Fuel temperature sensor 34 13 1,3 – 3,6 kΩ . . . . . . . . . . . . . . . . kΩ Boost air temperature sensor 55 13 1,3 – 3,6 kΩ . . . . . . . . . . . . . . . .
kΩ Boost pressure sensor 33, 36 13 Resistance measurement not appropriate Multistage switch No reduction active 35 13 500 – 520 Ω . . . . . . . . . . . . . . . . Ω Operating element for idle speed adjustment Non-actuated ”Sp” button actuated ”SET+” button actuated ”SET–” button actuated ”OFF” button actuated 44 13 550 – 700 Ω . . . . . . . . . . . . . . . . Ω 125 – 160 Ω . . . . . . . . . . . . . . . . Ω 50 – 70 Ω . . . . . . . . . . . . . . . . Ω 280 – 350 Ω . . . . . . . . . . . . . . . . Ω 930 – 1940 Ω . . . . . . . . . . . . . . . . Ω