ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
CORRECTIVE ACTION - Continued
Install a new IAPCV (WP 0102) onto the high pressure oil pump (part of fuel
transfer pump group).
a. Check the oil pressure at the fuel injection pump outlet port. Record the
b. If the oil pressure is above 27.5 MPa (4000 psi), the replacement of the
IAPCV has corrected the problem. Remove the test equipment from the
engine. Verify that the repair has resolved the problem.
If the oil pressure is below 27.5 MPa (4000 psi), remove the new IAPCV and
reinstall the original IAPCV (WP 0102). Proceed to STEP11.
Perform sections of the test that match the displayed failure codes.
Check the fuel injection pump drive gear.
b. Check for any physical damage to the drive gear.
Verify that the drive gear and the retaining bolt are properly tightened. Also
verify that the pump shaft rotates freely.
(1) If the drive gear bolt is properly tightened and the pump shaft rotates
(2) Verify that the repair has resolved the problem
(3) If the drive gear bolt is loose, the pump shaft rotates freely and there is
no obvious mechanical damage that would indicate a different problem,
tighten the drive gear bolt. Reinstall the fuel transfer pump (WP 0102).
(4) Recheck the pressure in order to ensure that the problem has been
resolved. If this does not fix the problem, replace the fuel transfer pump
(WP 0102). Verify that the repair has resolved the problem.
If this does
not fix the problem, replace the engine.
Verify the problem is resolved.