13B-25V12 MR-372-J84-13B300$050.mif
DIESEL INJECTION
Fault finding – Replacement of components13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
REPLACING THE INJECTORS
After one or more injectors have been replaced, enter the IMA codes again and then run command SC036
Reinitialise programming.
To do this, record the IMA code(s) etched on the injector bodies, and enter the codes into the computer using
command SC002 Enter injector codes, and follow the instructions given by the diagnostic tool. Run command
SC036 Reinitialise programming and select injectors, then follow the procedure. Note:
The "IMA" code (individual injector correction) is a calibration with corrective values unique to each injector,
and is used to adjust their flow accurately (injector classification). This correction takes into account mechanical
variances and the variances of the piezo actuator. An injector's class is determined by measurements taken at
different pressures on a test bench. The IMA class identification (7-character alphanumeric code) is then
engraved on the collar of the injector.
The IMA codes must be read from left to right:
– Foolproofing for reading the IMA codes is carried out using the low pressure return connector and/or the
electrical connector on the injector.
– This reading direction is valid when these connectors are located to the left of the cotech.
The IMA codes are read from left to right (see illustration in MR 402 (Vel Satis ph2), MR 395 (Laguna II ph2),
MR 364 (Mégane II ph2), MR 370 (Scénic II ph2), MR 405 (Espace IV ph2) Mechanical, 13B Diesel injection,
Diesel injector, Removal – Refitting)
Note: When entering characters, confusion can arise between:
– Figure 1 and the letters I and L,
– Figure 2 and the letter Z,
– Figure 5 and the letter S,
– Figure 6 and the letter G,
– Figure 8 and the letter B.
After programming or reprogramming the computer, it is essential to enter the 4 injector codes before confirming
the entry.
These individual corrective values are then written to the computer EEPROM, which can then control the injectors,
taking into account their manufacturing variation.
IMPORTANT:
Engines can only operate correctly if the correct IMA* codes have been entered. If no code has been
entered, or if an invalid code has been entered, fault DF066 Injector code(s) is present and the engine will
run in defect mode (engine speed limited significantly). If another injector's code has been entered, the
system will accept it but will make the wrong correction. This could lead to engine damage, loss of
performance and excessive pollution.
Always use the correct injector codes for the engine cylinder/computer.
Note:
On the M9R engine (Renault - Nissan partnership engine), cylinder no. 1 is located at the timing end.
