gf1520d3003ha

Start-up glowing, function

Type gf · topic 15.20 · version 0101 · 2009-04-27

Applies to: ENGINE 646.984 /985 /986 /989 in MODEL 906

Where it sits

Function group 1 Engine › 15 Electrical system - engine › 15.20 Preglow system — Series 646 (models 984, 985, 986, 989) · Series 906

GF15.20-D-3003HA

Start-up glowing, function

22.4.09

ENGINE 646.984 /985 /986 /989 in MODEL 906

Start-up glowing is used to stabilize the cold start engine speed.

The CDI control unit N3/21) receives the message "DAS 3 message MS" and message "tml. 50 ON" via the Class C Controller Area Network Bus (engine compartment) (CAN C) from the EIS [EZS] control unit (N73) and, on vehicles with transmission 722.6, the selector lever position message "P" or "N" from the EWM control unit (N15/5). The CDI control unit then actuates the glow output stage (N14/2).

The glow output stage further actuates the following glow plugs on the plus side.

Cylinder 1 glow plug (R9/1)

Cylinder 2 glow plug (R9/2)

Cylinder 3 glow plug (R9/3)

Cylinder 4 glow plug (R9/4)

Component description for the CDI control unit

GF07.16-D-6000HA

Component description for the vent line heater element

GF09.00-D-4010HA

Component description for the glow time output stage

GF15.20-D-4010HA

Component description for glow plugs

GF15.20-D-4020HA

Referenced documents