ad0713d600035a

Diesel injection system (EDC) test of electrical system hot film mass air flow sensor

Type ad · topic 07.13 · version 0100 · 2003-06-06

Applies to: ENGINE 602.980 in MODEL 901.###, 902.###, 903.### ## as of 745168 as of 6.10.97 with CODE (MS5) Motor schadstoffarm nach EG Stufe 2

Where it sits

Function group 1 Engine › 07 Mixture formation › 07.13 Diesel injection system distributor pump (DFI, EDC) — Series 602 (models 980) · Series 901 · Series 902 · Series 903

EinPAS 15 Engine › 15.45 Engine management › 15.45.1 Basic information — Series 602 (models 980) · Series 901 · Series 902 · Series 903

AD07.13-D-6000-35A

Diesel injection system (EDC) test of electrical system hot film mass air flow sensor

Scope of test

Measuring instrument/

Test connection

Operation/Requirement

Specified value

Possible cause/Remedy

1.0

Air mass sensor (B101)

Ground cable

MODELS 901, 902, 903 with code (MS5)

A20

6

B101

3

Ignition: OFF

Coupling on control unit disconnected

Coupling on air mass sensor disconnected

< 5 Ω

Cable

1.1

Voltage supply

12 V

A20

6

B101

2

Ignition: OFF

Coupling on air mass sensor

Ignition: ON

11-14 V

Cable

Fuse F15

1.2

Voltage supply

5 V

A20

6

B101

4

Ignition: ON

4.7-5.3 V

Cable

MSA control unit (A20)

1.3

Output voltage

6

A20

21

Ignition: ON

Engine: Idling

Coolant temperature

> 70° C

0.9 – 1.1 V

1.7 – 2.2 V

Increasing speed, increasing voltage

Cable

Air mass sensor (B101)