Component Inspection

INSPECTION

1. INSPECT INTAKE AIR FLOW METER SUB-ASSEMBLY




a. Check the operation.
1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
2. Using a voltmeter, connect the positive (+) tester prove to terminal 3 (VG) and the negative (-) tester prove to terminal 2 (E2G).
3. Blow air into the mass air flow meter, then check that the voltage fluctuates.
If the voltage does not fluctuate, replace the mass air flow meter.







b. Check the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.
If the result is not as specified, replace the mass air flow meter.

2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY







a. Check the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.
If the result is not as specified, replace the camshaft timing oil control valve.




b. Check the operation.
1. Apply battery voltage across the terminals, then check that the spool valve operates.

NOTE: Check that the spool valve is not stuck.

HINT: The spool valve may not return if foreign objects are caught in the spool valve. It may cause subtle pressure leaks to the advance side, and a DTC may be set.




3. INSPECT THROTTLE BODY ASSEMBLY
a. Check the throttle body.
1. Check that the throttle valve shaft is not rickety.
2. Check that all ports are not clogged.
3. Check that the throttle valve opens and closes smoothly.
4. Check that there is no clearance between the throttle stop screw and throttle lever at the throttle valve closed position.

NOTE: Do not touch the throttle stop screw.







4. INSPECT E.F.I. THROTTLE POSITION SENSOR
a. Check inspection.
1. Disconnect the throttle position sensor connector.
2. Using an ohmmeter, measure the resistance between terminals VC and E2.

Resistance: 2.5 to 6.0 kOhms

3. Check the resistance variation between terminals VTA and E2.

Variation of resistance:
The resistance value increases in proportion to the throttle lever opening value.

If the result is not as specified, replace the throttle position sensor.







5. INSPECT E.F.I. ENGINE COOLANT TEMPERATURE SENSOR

a. Check the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.

NOTE: If checking the engine coolant temperature sensor in water, be careful not to allow water to intrude into the terminals. After checking, wipe up water on the engine coolant temperature sensor.

If the result is not as specified, replace the engine coolant temperature sensor.







6. INSPECT KNOCK SENSOR

a. Check the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.

If the result is not as specified, replace the knock sensor.







7. INSPECT E.F.I. CIRCUIT OPENING RELAY ASSEMBLY
a. Check the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.
If the result is not as specified, replace the E.F.I. circuit opening relay assembly.







8. INSPECT E.F.I ECU RELAY

a. Check the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.
If the result is not as specified, replace the E.F.I ECU relay.