Mercedes-Benz ML320. Manual — part 388

Task

After engine start speed is reached, interrupt the circuit (circuit 50) M1 to the solenoid switch of the starter.

Design

The solenoid switch of the starter is operated not through the ignition/ start switch S2/1, but in drive position P
or N through the starter relay, by the engine control unit.

The voltage for the starter relay (coil) is supplied through circuit 87. The starter relay is actuated by the engine
control unit through GND.

Function

When the ignition/start switch is operated in the start position, the engine control unit activates an automatic
start control. Once the engine start speed of 400 to 700 rpm is reached, the engine control unit interrupts the
ground actuation to the starter relay and thus the engine start operation.

Once the engine start operation is initiated, shutting off circuit 50 at the ignition/start switch has no effect. The
starter rotates until the specified start speed is reached, or for about 5 seconds at an engine temperature of +80 °
C, for a maximum of 10 seconds if the engine is cold.

SAFETY PRECAUTIONS

SAFETY INFORMATION: ELECTRICAL SYSTEM - ENGINE - AS15.00-Z-9999ZZ

MODEL all

Motor electronics control unit,
location/task/ design/function

GF07.61-P-5000F

HFM-SFI control unit,
location/task/design/ function

GF07.51-P-4103D

Crankshaft position sensor,
location/task/ design/function

GF07.04-P-4116F

Start recognition function

Engine 104,, 111, 112,
113, 137 (via terminal 50)

GF07.13-P-3014G

Engine 119, 120 (via
engine speed signal)

GF07.13-P-3014F

ETC control unit, location/task Selector lever position

information P/N and
driving position engaged.
Transmission 722.6

GF27.19-P-4012G

Electronic ignition switch
control unit, location/
task/design/function

Model 202 as of 6/97, 208,
210 as of 3/97

GF80.57-P-4102A

Model 215, 220

GF80.57-P-4102S

Model 203, 209

GF80.57-P-4102PP

2001 Mercedes-Benz ML320

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

me

RISK OF DEATH CAUSED BY CONTACT WITH PARTS CONDUCTING HIGH VOLTAGES. - AS15.10-Z-0001-01A

Do not touch parts which conduct high voltages. Persons who wear electronic implants (e.g. heart
pacemakers) must not carry out work on the ignition system

Risk of death caused by high voltages in the ignition system

Electronic ignition systems operate within a hazardous power range both on the low voltage side (primary
circuit) as well as on the high voltage side (secondary circuit). Contacts with such parts can result in burns,
heart flutter or cardiac arrest.

Fig. 21: High Voltage Warning

Safety instructions/precautions



Persons with heart pacemakers must not perform any work on the ignition system.



Switch ignition off before commencing any work on the ignition system.



Do not touch or dismantle components of ignition system when working on running or rotating engine
with cranking speed.



Wear safety shoes (with rubber soles).



Detach the crankshaft position sensor connection either at the control unit or at the position sensor.



Do not install any electrically conducting, un-insulated adapters or installation sensors into the ignition
cable.

Risk of death caused by
coming into contact with
high-voltage parts although
ignition is turned off.

ENGINE 137 ENGINE
275 ENGINE 285

AS15.15-Z-0001-01A

Risk of death caused by
contact with parts
conducting high voltages.

ENGINE 103, 104, 111,
112, 113, 119, 120, 122,
132, 134, 135, 137, 155,
156, 160, 166, 266, 271,
272, 273, 275, 285, 613,
628, 629, 642, 646, 648,
902, 906...

AS15.10-Z-0001-01A

2001 Mercedes-Benz ML320

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

me

TROUBLE DIAGNOSIS

STARTER OCCASIONALLY DOES NOT START - AF15.30-P-6405A

ENGINE 112 in MODEL 129, 163, 170, 202, 208, 210, 220

ENGINE 113 in MODEL 129, 163, 202, 208, 210, 215, 220

ENGINE 119 in MODEL 129, 210

ENGINE 120 in MODEL 129

Modification notes

24.7.00

Supersedes STIP 07.60-022
dated 28.2.00

Reference link updated.

Damage code

Cause

Remedy

15 001 41

Starting operation is

terminated before engine
can start.
When starting tachometer
jumps momentarily in
direction > 2000 rpm.

DTC in ME-SFI

control unit:
No DTC stored.
1 Remove starter.

ENGINE 112, 113 in
MODEL 129

AR15.30-P-7100CS

ENGINE 119, 120 in
MODEL 129

AR15.30-P-7100EC

ENGINE 112, 113 in
MODEL 210

AR15.30-P-7100FF

ENGINE 119.985 129

AR15.30-P-7100FAF

ENGINE 112 in MODEL
202

AR15.30-P-7100ED

ENGINE 112.940 in
MODEL 208

ENGINE 112.947 170

AR15.30-P-7100GA

ENGINE 112.942,
113.942 in MODEL 163

AR15.30-P-7100GH

ENGINE 113.960 in
MODEL 215,

AR15.30-P-7100I

ENGINE 112, 113 in
MODEL 220

2 Coat teeth on starter
ring gear lightly with
paste

Use only paste

specified in parts note
Ensure that excessive

2001 Mercedes-Benz ML320

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

me

Parts ordering notes

TESTING & REPAIR

TESTING AND REPAIR WORK: PASSENGER CARS: ELECTRICAL SYSTEM - ENGINE - AR15.00-Z-9163AA

MODEL 163

REMOVE, INSTALL CAMSHAFT HALL SENSOR - AR15.10-P-2000A

ENGINE 112.945 in MODEL 463.209 /232 /233 /244 /245 /250

ENGINE 112 in MODEL 129, 163, 170, 202, 203, 208, 209.361 /365/461 /465, 210,
211.061 /261 /065 /265 /080 /082 /280 /282, 220, 230.467

ENGINE 113 (except 113.990/991) in MODEL 129, 163, 202, 208, 209.375/475/376/476, 210,
211.070 /270 /083 /283, 215, 220, 230.472 /474 /475

ENGINE 113.962 in MODEL 463.206 /240 /241 /247 /248 /249 /254

ENGINE 113.982 in MODEL 463.243/246

quantity of paste is not
applied because this can
interfere with the signal
pickup of position sensor
L5

3 Install starter.

Part no.

Designation

Quantity

000 989 76 51

Paste (1 kg)

1

Servicing wiring harness

MODEL 124, 126, 129,
140, 163, 168, 170, 201,
202, 208, 210, 215, 220

AR15.18-P-0500A

2001 Mercedes-Benz ML320

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

me