Engine: Testing and Inspection
Engine (FA20)Function inspection
1. Coolant (SUBARU Super Coolant) check Testing and Inspection
2. Engine oil inspection Testing and Inspection
3. Battery check
4. Check of air cleaner filter element SUB-ASSY
(1) Inspect the air cleaner filter element SUB-ASSY for dirt or clogging.
5. V-ribbed belt tensioner ASSY check
(1) Remove the fan & generator V belt from belt tensioner pulley.
(2) Move the V-ribbed belt tensioner ASSY in the both rotational directions to check whether it is caught.
NOTE:
Replace the V-ribbed belt tensioner ASSY if faulty.
(3) Install the fan & generator V belt.
6. Ignition timing inspection
(1) Warm up the engine and stop.
(2) Connect the SSM3 to the DLC.
(3) Start the engine.
(4) According to the procedure shown on the display, display the [Data monitor]->[Ignition timing adv. #1] screen to measure the ignition timing.
Standard value: -5 to 10°CA BTDC
CAUTION:
Perform this measurement with all accessory switches OFF, A/C OFF, electric fan OFF and shift position N or P.
(5) Check that the ignition timing advances promptly when the engine speed is increased.
7. Idle speed check
(1) Warm up the engine and stop.
(2) Inspection with SSM3
(a) Connect the SSM3 to the DLC.
(b) Start the engine.
(c) According to the procedure shown on the display, display the [Data monitor] screen to measure the engine speed.
Standard value
CAUTION:
Perform this measurement with all accessory switches OFF, A/C OFF, electric fan OFF and shift position N or P.
8. Compression inspection
(1) Check the diagnosis code.
(2) Remove the relay block cover UPR.
(3) Remove the fuel pump fuse from the engine compartment relay block.
Captions in illustration
(4) Start the engine.
(5) Turn the ignition to OFF after the engine stalls by itself.
(6) Crank the engine once and check that it does not start.
(7) Remove the four spark plugs.
(8) Set the compression gauge and compression gauge attachment.
Captions in illustration
(9) Install the injector driver.
(10) Fully open the throttle.
(11) With the brake pedal depressed, crank the engine and measure the compression of each cylinder.
Compressor: 1150 to 1750 kPa {11.7 to 17.8 kgf/cm2} {167 to 254 psi}
Difference between cylinders: 200 kPa {2.0 kgf/cm2} {29 psi}
CAUTION:
^ Perform compression inspection in a short period of time.
^ Use a fully charged battery to keep the engine speed at 250 rpm or more.
NOTE:
When the compression pressure is low, pour a small amount of engine oil into cylinders and measure the compression again.
^ When the compression increases, it is possible that the piston rings etc. are worn.
^ When the compression does not change, it is possible that the valve system is faulty.
(12) Remove the injector driver.
(13) Install the four spark plugs.
(14) Install the fuel pump fuse.
(15) Install the relay block cover UPR.
(16) Clear the diagnosis code.
CAUTION:
Be sure to clear the memory of diagnosis code once and then check that the normal code is output.
9. CO, HC concentration inspection
NOTE:
This check is for determining whether or not the idle CO/HC complies with regulations.
(1) Start the engine.
(2) Maintain the engine speed at 2500 rpm for approximately 180 seconds.
(3) Insert a CO/HC meter testing probe at least 40 cm {15.7 in} into the tailpipe during idling.
(4) Immediately check the CO/HC concentration at idle and/or 2500 rpm.
NOTE:
^ When performing the 2 mode (2500 rpm and idle) test, follow the measurement order prescribed by the applicable local regulations.
^ If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.
(a) Check the A/F sensor and heated oxygen sensor operation.
(b) Refer to the table below for the possible cause, and then inspect and correct the applicable causes if necessary.
