Leon Mk2
| Injection system components: removing and fitting |
| 1 - | Motronic control unit -J220-* |
| q | Location → Chapter, synoptic chart of the engine compartment |
| q | For injection system, lambda regulation, activated charcoal filter solenoid valve -N80-, knock control, ignition and self-diagnosis |
| q | Test the voltage supply → Chapter |
| q | How to proceed after an interruption in voltage supply → Chapter |
| q | Replace → Chapter |
| q | Basic settings must be carried out in the event of replacement → Chapter |
| q | In the event of replacement, adapt the engine control unit to the electronic immobiliser → Chapter |
| 2 - | Fixing mark |
| 3 - | 10 Nm |
| 4 - | Supply hose |
| q | Black, with white mark |
| q | Immobilise with elastic strip clamps |
| q | Check for firm seating |
| q | Comes from the fuel filter: → Rep. Gr.20. |
| 5 - | Return hose |
| q | Black, with blue mark |
| q | Immobilise with elastic strip clamps |
| q | Check for firm seating |
| q | Goes to the fuel transport unit in the tank: → Rep. Gr.20. |
| 6 - | Wire guide |
| q | Clipped on the fuel distributor |
| 7 - | Fixing clip |
| q | Check the model |
| 8 - | Connector |
| q | Black, 2-pin |
| q | For injector (-N30-...N33) |
| 9 - | Connector |
| q | Black, 6-pin |
| q | For throttle valve drive unit -J338- |
| q | Connector with gold contacts |
| 10 - | Connector |
| q | Black, 4-pin |
| q | For intake manifold pressure sender -G71- and intake air temperature sender -G42- |
| q | Connector with gold contacts |
| 11 - | Fuel distributor with injectors |
| q | Disassembly and assembly → Chapter |
| 12 - | Vacuum hose |
| 13 - | 20 Nm |
| 14 - | Intake manifold |
| q | Disassembly and assembly → Chapter |
| 15 - | Hose |
| q | Comes from the oil separator: → Rep. Gr.17. |
| 16 - | Hose |
| q | Comes from brake servo |
| 17 - | 5 Nm |
| 18 - | Engine revs sender -G28-* |
| q | Location → Chapter, synoptic chart of component location |
| q | Before removing, remove the intake manifold, → Item |
| q | Test → Chapter |
| 19 - | Connector |
| q | For post-catalyst lambda probe -G130- and lambda probe heating -Z29- |
| q | Black, 4-pin |
| q | Contacts 3 and 4, gold |
| 20 - | Post-catalyst lambda probe 2 -G130-*, 50 Nm |
| q | Location → Chapter, engine compartment synoptic chart |
| q | Grease the thread with -G 052 112 A3- only. The. -G 052 112 A3- must not get into the grooves in the probe housing |
| q | Remove and fit with ring spanner -U-40080- |
| q | Probe heating voltage supply via fuel pump relay -J17- |
| q | Test the post-catalyst lambda heating → Chapter |
| q | Test the post-catalyst lambda probe and lambda regulation → Chapter |
| 21 - | Pre-catalyst lambda probe 1 -G39-*, 50 Nm |
| q | Location → Chapter, engine compartment synoptic chart |
| q | Grease the thread with -G 052 112 A3- only. The. -G 052 112 A3- must not get into the grooves in the probe housing |
| q | Remove and fit with ring spanner -U-40080- |
| q | Probe heating voltage supply via fuel pump relay -J17- |
| q | Test the pre-catalyst lambda probe heating → Chapter |
| q | Test the pre-catalyst lambda probe and lambda regulation → Chapter |
| q | Test the ageing of lambda probe 1 → Chapter |
| 22 - | Connector |
| q | For pre-catalyst lambda probe 1 -G39- and lambda probe heating -Z19- |
| q | Black, 6-pin |
| q | Gold contacts |
| 23 - | Seal |
| q | Replace |
| 24 - | Thermostat housing |
| 25 - | Clip |
| q | Check for firm seating |
| 26 - | O-ring |
| q | Replace if worn |
| 27 - | Connector |
| q | Black, 4-pin |
| q | For the coolant temperature sender -G62- and coolant temperature indicator sender -G2- |
| 28 - | Coolant temperature sender -G62-* |
| q | Green |
| q | For engine control unit |
| q | With coolant temperature indicator sender -G2- |
| q | Before removing, reduce the coolant system pressure |
| q | Resistance values between contacts 3 + 4 → Fig. |
| q | Test → Chapter |
| 29 - | Plug |
| q | Before removing, reduce the coolant system pressure |
| 30 - | Guide line |
| q | For the oil dipstick |
| 31 - | 6 Nm |
| 32 - | Deaeration line |
| q | Comes from the activated charcoal filter solenoid valve -N80-: → Rep. Gr.20. |
| 33 - | Connector |
| q | Unplug or plug in the connector with the ignition off |
