Toyota Sienna Service Manual: Basic inspection
When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when engine troubleshooting.
1 CHECK BATTERY VOLTAGE
| NOTICE: Carry out this check with the engine stopped and ignition switch off. |
Result 
2 CHECK WHETHER ENGINE CRANKS
3 CHECK WHETHER ENGINE STARTS
4 CHECK AIR FILTER
(a) Visually check that the air filter is not excessively contaminated with dirt or oil.
5 CHECK IDLING SPEED
(a) Check the idling speed (See page EM-2).
6 CHECK FUEL PRESSURE
(a) Check the fuel pressure (See page FU-7).
7 CHECK FOR SPARKS
(a) Check for sparks (See page ES-217).
PROCEED TO PROBLEM SYMPTOMS TABLE
Check for intermittent problems
1. CHECK FOR INTERMITTENT PROBLEMS
HINT:
For use of the intelligent tester only:
Inspect the vehicle's ECM using check mode.
Intermittent problems are easier to detect with an
intelligent teste ...
Registration
NOTICE:The Vehicle Identification Number (VIN) must be
input
into the replacement ECM.
HINT:
The VIN is a 17-digit alphanumeric vehicle identification
number. The intelligent tes ...
Other materials:
Registering a new contact to the contact list
New contact data can be registered. Up to 4 numbers per person can be
registered. For PBAP compatible Bluetooth® phones, this function is available
when “Automatic Transfer” is set to off.
Select “New Contact”.
Enter the name and select “OK”.
Enter the phone number and sele ...
When stopping the engine with the shift lever in a position other
than P
If the engine is stopped with the shift lever in a position other than P,
the engine switch will not be turned off but instead be turned to
ACCESSORY mode. Perform the following procedure to turn the
switch off:
Check that the parking brake is set.
Shift the shift lever to P.
Check that t ...
Reassembly
1. INSTALL LIGHT CONTROL ECU (DISCHARGE HEADLIGHT)
Install a new headlight leveling motor base packing.
Install the headlight leveling motor assembly as
shown in the illustration.
Connect the connector with the claw
Install the light control ECU with the 2 ...
