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J745500 remove and install engine control unit (Z
14 XE, Z 16 YNG with AC, RHD)
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Important: Before
removing the engine control unit: reset using TECH2.
1. When replacing the engine control unit
Note: Reset using
TECH2 - see operation "Operations to be performed with TECH 2 when
replacing control units" in group "N".
2. Open bonnet
Important: On
vehicles as of model year 04 with ESP - the steering angle sensor
loses its basic adjustment each time the battery is disconnected.
It must be recalibrated.
3. Disconnect battery
4. Remove engine cover
- Unscrew oil filler pipe cap
- Remove 2 bolts
- Screw on oil filler pipe cap
5. Remove engine control unit
- Remove wiring harness plug
- Oxygen sensor, mixture regulating, heated (1), ignition module
(3), engine control unit (4), combination plug (5)
- Remove ground cable (2)
- Remove 4 bolts
6. Install engine control unit
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- Install 4 bolts (8 Nm / 6 lbf. ft.)
- Attach 5 wiring harness plugs
- Connect ground cable.
7. Install engine cover
- Unscrew oil filler pipe cap
- Tighten bolts (8 Nm / 6 lbf. ft.)
- Screw on oil filler pipe cap
8. Connect battery
9. Calibrate steering angle sensor
Note: Rotate the
steering wheel one time from its right-hand to its left-hand
stop.
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10. When replacing the engine control unit
- Reprogram engine control unit
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The engine control units delivered to Service have been
programmed for ECOService-Flex.
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ECOService-Flex:
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up to 2 years/30,000 km (up to max. 34,000 km possible)
Petrol
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Exception: ECOService:
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1 year/30,000 km
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1
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Engine control unit (ECM) must be replaced.
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2
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Is the necessary documentation available?
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- Service Booklet
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– ECM/instrument assembly can still be read out
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– Customer records, invoices available
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3
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Time or distance exceeded, for ECOService 30,000 km/2 years
Fixed interval for petrol and diesel engines
or
ECOService 30,000 km/1 year
Fixed interval for petrol and diesel engines
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4
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Determine whether ECOService or ECOService-Flex
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5
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Fill out and affix sticker (1 year/30,000 km)
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6
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Program instrument assembly to ECOService
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7
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Selection, petrol or diesel engine
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8
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Fill out and affix sticker (2 years/30,000 km, petrol
engine)
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9
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Fill out and affix sticker (2 years/30,000 km, diesel
engine)
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10
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Oil change necessary
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11
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Dealer agreement with customer
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12
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Decision (customer request)
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ECOService or
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ECOService-Flex
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13
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ECOService
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(Program instrument assembly)
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14
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ECOService-Flex
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Reset remaining time using TECH 2
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-
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ECOService-Flex
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=
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ECOService
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Y
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Yes
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N
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No
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- See operation "Operations to be performed with TECH 2 when
replacing control units" in group "N"
- CAN configuration list, version coding, tyre size
End communication
Note: For additional
information, see the operation "Flexible maintenance intervals"
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11. When replacing the engine control unit
- Fill out the service sticker
Note: Fill out the
service sticker - see operation "Flexible maintenance
intervals".
12. Program volatile memories
13. Close bonnet
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