On-Vehicle Inspection

1GR-FE ENGINE MECHANICAL: ENGINE: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. INSPECT ENGINE COOLANT Testing and Inspection
2. INSPECT ENGINE OIL Testing and Inspection
3. INSPECT BATTERY Testing and Inspection
4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
5. INSPECT SPARK PLUG Testing and Inspection
6. INSPECT FAN AND GENERATOR V BELT Testing and Inspection
7. INSPECT IGNITION TIMING
NOTICE:
- Turn all the electrical systems OFF.
- Conduct the inspection when the cooling fan motor is turned OFF.

(a) Warm up the engine.
(b) When using the Techstream:
(1) Connect the Techstream to the DLC3.
(2) Select the following menu items: Powertrain / Engine and ECT / Date List / IGN Advance.
(3) Inspect the ignition timing during idling.
Ignition timing:
7 to 24°CA BTDC during idling (Transmission in neutral position)
(4) Check that the ignition timing advances immediately when the engine speed is increased.
(c) When not using Techstream:




(1) Using SST, connect the terminals 13 (TC) and 4 (CG) of the DLC3.
SST: 09843-18040
NOTE: Do not connect the terminals incorrectly as it causes breakage of the engine.
(2) Remove the air cleaner.




(3) Pull out the wire harness shown in the illustration.
(4) Connect the tester probe of a timing light to the wire of the ignition coil connector for the No. 1 cylinder.
NOTICE:
- Use timing light that detects the first signal.
- After checking, wrap the wire harness with tape.




(5) Inspect the ignition timing during idling.
Ignition timing:
8 to 12°CA BTDC during idling (Transmission in neutral position)
(6) Remove SST from the DLC3.
(7) Inspect the ignition timing during idling.
Ignition timing:
7 to 24°CA BTDC during idling (Transmission in neutral position)
(8) Install the air cleaner.
8. INSPECT ENGINE IDLING SPEED
NOTICE:
- Turn all the electrical systems OFF.
- Operate the inspection when the cooling fan motor is turned OFF.

(a) Warm up the engine.
(b) When using the Techstream:
(1) Connect the Techstream to the DLC3.
(2) Select the following menu items: Powertrain / Engine and ECT / Date List / Engine Speed.
(3) Inspect the engine idling speed.
Idling speed:
650 to 750 rpm (Transmission in neutral position)





(c) When not using the Techstream:
(1) Using SST, connect the terminal 8 (TAC) of the DLC3.
SST: 09843-18030
(2) Race the engine speed at 2,500 rpm for approximately 90 seconds.
(3) Inspect the engine idling speed.
Idling speed:
650 to 750 rpm (Transmission in neutral position)
9. INSPECT COMPRESSION
(a) Warm up and stop the engine.
(b) Remove the circuit opening relay Circuit Opening Relay.
(c) Remove the V-bank cover Removal.
(d) Remove the air cleaner assembly Removal.
(e) Remove the throttle body bracket Removal.
(f) Remove the oil baffle plate Removal.
(g) Remove the No. 1 surge tank stay Removal.
(h) Remove the No. 2 surge tank stay Removal.
(i) Remove the ignition coils Removal.
(j) Remove the spark plugs.





(k) Inspect the cylinder compression pressure.
(1) Insert a compression gauge into the spark plug hole. (*1)
SST: 09992-00500
(2) Fully open the throttle. (*2)
(3) While cranking the engine, measure the compression pressure. (*3)
Compression pressure:
1,300 kPa (13.3 kgf/cm2, 189 psi)
Minimum pressure:
1,000 kPa (10.2 kgf/cm2, 145 psi)
Difference between cylinders:
100 kPa (1.0 kgf/cm2, 15 psi)
NOTICE:
- Use a fully-charged battery so the engine speed can be increased to 2,500 rpm or more.
- Inspect the other cylinders in the same way.
- Measure the compression in as short a time as possible.
(4) If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat steps (*1) through (*3) for cylinders with low compression.

- If adding oil increases the compression, the piston rings and/or cylinder bore may be worn or damaged.

- If the pressure stays low, a valve may be stuck or seated improperly, or there may be leakage from the gasket.

10. INSPECT CO/HC
(a) Start the engine.
(b) Run the engine at 2,500 rpm for approximately 180 seconds.
(c) Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe during idling.
(d) Immediately check the CO/HC concentration during idling and/or while running at 2,500 rpm.
HINT:
- Complete the measurement within 3 minutes.
- When carrying out the 2 mode (with the engine idling/running at 2,500 rpm) test, the measurement orders are prescribed by the applicable local regulations.

(e) If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.
(1) Check the heated oxygen sensor operation.