Toyota Highlander Service Manual: Inspection
1. INSPECT MASS AIR FLOW METER
(a) Check the output voltage.
- Apply battery voltage across terminals 1 (+B) and 2 (E2G).
- Connect the positive (+) tester probe to terminal 3 (VG), and negative (-) tester probe to terminal 2 (E2G).
- Blow air into the Mass Air Flow (MAF) meter, and check that the voltage fluctuates.
(b) Measure the resistance between terminals 4 (THA) and 5 (E2).
Standard:
If the result is not as specified, replace the MAF meter.
2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY
(a) Measure the resistance between the terminals.
Standard: 6.9 to 7.9 W at 20 C (68 F) If the result is not as specified, replace the OCV assy.
(b) Connect the battery's positive (+) lead to terminal 1 and negative (-) lead to terminal 2, and check the movement of the valve.
NOTICE: Confirm that the valve moves freely and does not become stuck in any position.
If necessary, replace the OCV assy.
HINT: If the valve cannot return properly because of foreign matter, a small pressure leak in the advanced direction may occur and a DTC will be output.
3. INSPECT ACCELERATOR PEDAL ROD ASSY
(a) Check the accelerator pedal position sensor (see page 05-102 ).
4. INSPECT THROTTLE BODY ASSY
(a) Check the throttle position sensor (see page 05-469 ).
(b) Check the throttle control motor.
- Measure the resistance between terminals 2 (M+)
and 1 (M-).
Resistance: 0.3 to 100 W at 20 C (68 F)
If the result is not as specified, replace the throttle body assy.
5. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
(a) Measure the resistance between terminals 1 and 2.
Standard:
If the result is not as specified, replace the sensor.
NOTICE: If checking the ECT sensor in the water, keep the terminals dry. After the check, wipe the sensor dry.
6. INSPECT KNOCK SENSOR
(a) Measure the resistance between the terminals.
Standard: 120 to 280 kW at 20 C (68 F)
If the result is not as specified, replace the sensor
7. INSPECT RELAY (Marking: EFI, A/F)
(a) Remove the EFI relay from the engine room J/B.
(b) Remove the A/F relay from the engine room R/B No. 2.
(c) Measure the resistance of the relay.
Standard:
If the result is not as specified, replace the relay.
8. INSPECT CIRCUIT OPENING RELAY
(a) Remove the circuit opening relay from the R/B sub-assy (b) Measure the resistance of the relay.
Standard:
If the result is not as specified, replace the relay.
On-vehicle inspection
1. CHECK THROTTLE BODY
(a) Listen to the throttle control motor operating sounds.
Turn the ignition switch ON.
When pressing the accelerator pedal position sensor lever, listen
t ...
Throttle body ASSY (2AZ-FE)
COMPONENTS
REPLACEMENT
1. DRAIN ENGINE COOLANT (See page 16-6 )
2. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE (See page 14-24 )
3. REMOVE THROTTLE BODY ASSY
(a) Disconnect the throttle contro ...
More about Toyota Highlander:
If the vehicle becomes
stuck
Carry out the following procedures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
Stop the engine. Set the parking brake and shift the shift lever to p.
Remove the mud, snow or sand from around the front wheels.
Place wood, stones or some other material under the front ...
