Isuzu 4ja1, Workshop Manual

Page: 13 / 564

TROUBLESHOOTING 6 – 11
9. Oil Pressure Does Not Rise
Step Action Value(s) Yes No
1 Was the oil pressure warning lamp working OK? —
Go to Step 2
Replace the oil
pressure
warning lamp
2 Does the oil filter element clog? — Replace the oil
filter element Go to Step 3
3 Does the relief valve open? — Repair or
replace the
relief valve Go to Step 4
4 Does the oil strainer clog? — Clean or
replace the oil
strainer Go to Step 5
5 Was the oil pump working OK? (The pump related
parts worn etc.) —
Go to Step 6
Repair or
replace the oil
pump.
6 Was the rocker arm and/or relation parts worn? — Replace the
rocker arm
and/or relation
parts Go to Step 7
7 Was the camshaft and/or relation parts worn? — Replace the
camshaft
and/or relation
parts Go to Step 8
8 Was the crankshaft and/or relation parts worn? — Replace the
crankshaft
and/or relation
parts Go to Step 9
9 Are any DTC stored? — Go to indicated
DTC Solved
Table of pressure unit
Pressure kPa (kg/cm
2
) 100
(1.0)
980
(10.0)
Resistance ohm 81 30
Electric current A 63.5 106.7