For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Is the oil pressure warning lamp on? | -- | Go to Step 2 | System OK
2 | Check the oil level in the crankcase. Is the oil level low? | -- | Go to Step 3 | Go to Step 4
3 | Add oil so that the oil level is up to the full mark on the indicator. Is the repair complete? | -- | Go to Step 1 | --
4 | Check the idle speed. Is the idle speed below the specified value ? | 840 ± 20 RPM | Go to Step 5 | Go to Step 6
5 | Increase the idle speed. Is the speed increased? | -- | Go to Step 1 | --
6 | Inspect the oil pressure switch. Is the oil pressure switch incorrect or malfunctioning? | -- | Go to Step 7 | Go to Step 8
7 | Install a new oil pressure switch. Is the repair complete? | -- | Go to Step 1 | --
8 | Inspect the oil pressure gage. Is the oil pressure gage incorrect or malfunctioning? | -- | Go to Step 9 | Go to Step 10
9 | Install a new oil pressure gage. Is the repair complete? | -- | Go to Step 1 | --
10 | Inspect the engine oil. Is the engine oil in the crankcase diluted or of the improper viscosity? | -- | Go to Step 11 | Go to Step 12
11 | Install new engine oil of the proper viscosity for the expected temperatures. Is the repair complete? | -- | Go to Step 1 | --
12 | Inspect the oil pump. Is the pump worn or dirty? | -- | Go to Step 13 | Go to Step 14
13 | Replace the oil pump. Is the repair complete? | -- | Go to Step 1 | --
14 | Inspect the oil filter. Is the oil filter plugged? | - | Go to Step 15 | Go to Step 16
15 | Install a new oil filter. Is the repair complete? | -- | Go to Step 1 | --
16 | Inspect the oil pickup screen. Is the oil pickup screen loose or plugged? | -- | Go to Step 17 | Go to Step 18
17 | Tighten or replace the oil pickup screen, as necessary. Is the repair complete? | -- | Go to Step 1 | --
18 | Inspect the oil pickup tube. Are there any holes in the oil pickup tube? | -- | Go to Step 19 | Go to Step 20
19 | Replace the oil pickup tube. Is the repair complete? | -- | Go to Step 1 | --
20 | Inspect the bearing clearances. Are the bearing clearances more than the specified values? | 0.024-0.042 mm (0.00094-0.00115 in) | Go to Step 21 | Go to Step 22
21 | Replace the bearing, if necessary. Is the repair complete? | -- | Go to Step 1 | --
22 | Inspect the oil galleries. Are the oil galleries cracked, porous, or plugged? | -- | Go to Step 23 | Go to Step 24
23 | Repair or replace the engine block. Is the repair complete? | -- | Go to Step 1 | --
24 | Inspect the gallery plugs. Are any of the gallery plugs missing or installed improperly? | -- | Go to Step 25 | Go to Step 26
25 | Install the plugs or repair, as necessary. Is the repair complete? | -- | Go to Step 1 | --
26 | Inspect the camshaft. Is the camshaft worn or is there evidence of poor machining? | -- | Go to Step 27 | System OK
27 | Replace the camshaft. Is the repair complete? | -- | Go to Step 1 | --