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 VG, and negative (-) tester probe to terminal 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 acceletor pedal position sensor (see page 05-469 ).
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 each terminal.
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.
Resistance: 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 (3MZ-FE)
COMPONENTS
REPLACEMENT
1. DRAIN ENGINE COOLANT (See page 16-26 )
2. REMOVE FRONT SUSPENSION BRACE SUB-ASSY UPPER CENTER
(a) Remove the 2 nuts and upper brace.
3. REMOVE V-BANK COVER SUB-A ...
More about Toyota Highlander:
Replacement
1. REMOVE FRONT SUSPENSION BRACE SUB-ASSY UPPER CENTER (SEE PAGE 32-14 )
2. REMOVE AIR CLEANER ASSY (2AZ-FE ENGINE TYPE) (SEE PAGE 14-24 )
3. REMOVE AIR CLEANER CAP SUB-ASSY (3MZ-FE ENGINE TYPE) (SEE PAGE 14-149 )
4. REMOVE AIR CLEANER FILTER ELEMENT SUB-ASSY (3MZ-FE ENGINE TYPE)
(SEE PAGE 14-14 ...
