Toyota Prius 2010 Operating instructions

ILLUSTRATION

ON-VEHICLE INSPECTION
1. INSPECT THROTTLE BODY ASSEMBLY
(a) Check for throttle control motor operating sound.
(1) Turn the power switch on (IG).
(2) When depressing the accelerator pedal, check the operating sound of the motor. Make sure that no friction
noises are emitted from the motor. If any friction noise exists, replace the throttle body assembly.
(b) Set the vehicle to the inspection mode .
(c) Start the engine and check that the MIL is not illuminated. After the engine is warmed up, check that the idle
speed is within the specified range when the A/C is switched off.
Standard:
Condition
Engine Idle Speed
A/C switched off
950 to 1050 rpm
NOTICE:
x Be sure to perform this step with all accessories off.
x Make sure that park (P) is selected.

REMOVAL
1. REMOVE NO. 1 ENGINE UNDER COVER
2. DRAIN ENGINE COOLANT (for Engine)
3. REMOVE NO. 2 CYLINDER HEAD COVER
4. REMOVE AIR CLEANER CAP SUB-ASSEMBLY
(a) Disconnect the mass air flow meter connector.
(b) Release the 2 clamps.
(c) Loosen the hose clamp and remove the air cleaner cap.
5. REMOVE INLET AIR CLEANER ASSEMBLY
(a) Separate the hose from the hose clamp.

(b) Separate the wire harness clamp from the inlet air cleaner assembly.
(c) Remove the 3 bolts and inlet air cleaner assembly.
6. REMOVE AIR CLEANER CASE
(a) Remove the air cleaner filter element.
(b) Separate the hose from the 3 hose clamps.
(c) Remove the 3 bolts and air cleaner case.
7. REMOVE AIR CLEANER HOSE ASSEMBLY
(a) Loosen the hose clamp and separate the ventilation hose.

(b) Unlock the hose clamp and remove the air cleaner hose assembly.
8. REMOVE THROTTLE BODY ASSEMBLY
(a) Disconnect the throttle body connector and the 2 water by
-
pass hoses.
(b) Remove the 2 bolts, 2 nuts and throttle body assembly.
(c) Remove the gasket from the intake manifold.

INSPECTION
1. INSPECT THROTTLE BODY ASSEMBLY
(a) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*1
Component without harness connected
(Throttle Body)
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 (M-) - 2 (M+)
20°C (68°F)
0.3 to 100 Ω
If the result is not as specified, replace the throttle body assembly.

INSTALLATION
1. INSTALL THROTTLE BODY ASSEMBLY
(a) Install a new gasket onto the intake manifold.
(b) Install the throttle body assembly with the 2 bolts and 2 nuts.
Torque:
10 N·m (102 kgf·cm, 7ft·lbf)
(c) Connect the 2 water by-pass hoses and throttle body connector.
2. INSTALL AIR CLEANER HOSE ASSEMBLY
(a) Install the air cleaner hose assembly and lock the hose clamp.
(b) Connect the ventilation hose.
3. INSTALL AIR CLEANER CASE
(a) Install the air cleaner case with the 3 bolts.
Torque: 7.0 N·m (71 kgf·cm, 62in·lbf)

(b) Install the hose to the 3 hose clamps.
(c) Install the air cleaner filter element.
4. INSTALL INLET AIR CLEANER ASSEMBLY
(a) Install the inlet air cleaner assembly with the 3 bolts.
Torque:
7.0 N·m (71 kgf·cm, 62in·lbf)
(b) Connect the wire harness clamp to the inlet air cleaner assembly.
(c) Install the hose to the hose clamp.
5. INSTALL AIR CLEANER CAP SUB-ASSEMBLY
(a) Install the air cleaner cap sub
-
assembly with the 2 clamps.

(b) Tighten the hose clamp.
(c) Connect the mass air flow meter connector.
6. ADD ENGINE COOLANT (for Engine)
7. INSPECT FOR COOLANT LEAK (for Engine)
8. INSTALL NO. 2 CYLINDER HEAD COVER
9. INSTALL NO. 1 ENGINE UNDER COVER
10. PERFORM INITIALIZATION
NOTICE:
Be sure to perform this procedure after reassembling the throttle body assembly, removing and reinstalling any
throttle body component or replacing the ECM.
(a) Disconnect the cable from the negative (-) battery terminal. Wait at least 60 seconds and reconnect the cable.
(b) Connect the Techstream to the DLC3 and clear the DTCs .
(c) Set the vehicle to the inspection mode .
(d) Start the engine without operating the accelerator pedal and check that the MIL is not illuminated and that
the idle speed is within the specified range when the air conditioning is switched off after the engine is warmed
up.
Standard:
Condition
Engine Idle Speed
A/C switched off
950 to 1050 rpm
NOTICE:
x If the accelerator pedal is operated, perform the above steps again.
x Be sure to perform this step with all accessories off.
x Make sure that park (P) is selected.
(e) Perform a road test and confirm that there are no abnormalities.