Petrol injection ECU

Essential equipment

diagnostic tool

Tightening torques
battery tray	2.1 daN.m

REMOVAL

• Remove the engine covers.
• Disconnect the battery.

K4J

• Disconnect the connectors (1) from the injection ECU.
• Remove:

• the four ECU mounting screws on the bracket,
• the ECU.

F4R or K4M

• Remove the battery.
• Disconnect the connectors (2) from the injection ECU.
• Remove:

• the three mounting bolts (3) of the battery tray,
• the clip (4) of the wiring harness.

• Unclip the wiring harnesses from the battery tray.
• Remove the battery tray.

• Remove the injection ECU (5) with its bracket.

• Remove the four ECU mounting screws.

INSTALLATION

• Refit in the reverse order of removal.
• Tighten the battery tray to torque (2.1 daN.m).

WARNING

Connect the battery; carry out the necessary re-learns (see Electrical Equipment chapter).

Note: When the ignition is switched on, the electronic throttle body must carry out a learning cycle of its minimum and maximum stops.

• Use the diagnostic tool to check that this learning has been completed correctly: ET051: Throttle stop learning.
• Carry out flywheel target learning on a road test: perform two successive decelerations in third gear, from 4000 rpm down to the engine re-engagement speed.

  Engine re-engagement is the point where, during a deceleration with the foot off the pedal and injection cut off, the ECU re-enables injection.

• Use the diagnostic tool to check that this learning has been completed correctly: ET089 "Flywheel target learning".
• Read the fault codes.
• Repair if necessary.
• Clear the fault codes.
• Make sure the vehicle operates correctly.