Toyota Sienna Service Manual: How to proceed with troubleshooting
Hint:
- The ecm of this system is connected to the can and multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the can and multiplex communication systems
- The intelligent tester can be used at steps 3, 4, 6, and 9.
1 Vehicle brought to workshop
2 Customer problem analysis
3 Connect the obd ii scan tool or intelligent tester to dlc3
4 Check and clear dtcs and freeze frame data
Hint: (see page ax-27).
5 Visual inspection
6 Setting the Check Mode Diagnosis
HINT: (See page AX-28).
7 Problem Symptom Confirmation
HINT: (See page AX-9).
8 Symptom Simulation
HINT: (See page IN-35).
9 DTC Check
HINT: (See page AX-27).
10 Basic Inspection
HINT: (See page AX-127, AX-123 and AX-148).
11 Mechanical System Test
HINT: (See page AX-12).
12 Hydraulic Test
HINT: (See page AX-14).
13 Manual Shifting Test
HINT: (See page AX-15).
14 Problem Symptoms Table Chapter 1
HINT: (See page AX-19).
15 Problem Symptoms Table Chapter 2
HINT: (See page AX-19).
16 Part Inspection
17 DTC Chart
HINT: (See page AX-35).
18 Circuit Inspection
19 Repair or Replace
20 Confirmation Test
End
System description
1. SYSTEM DESCRIPTION
(a) The ECT (Electronic controlled automatic
transmission/transaxle) is an automatic
transmission/transaxle that electronically controls
shift timing using the ECM. The ECM d ...
Road test
1. PROBLEM SYMPTOM CONFIRMATION
(a) Based on the result of the customer problem
analysis, try to reproduce the symptoms. If the
problem is that the transaxle does not shift up, shift
down, or the ...
Other materials:
Installation
1. INSTALL THROTTLE BODY
(a) Install a new throttle body gasket to the intake air
surge tank.
(b) Install the throttle body with the 4 bolts.
Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf)
(c) Connect the 2 water by-pass hoses.
(d) Connect the throttle body connector and clamp.
2. INSTA ...
Symptom confirmation and diagnostic trouble code
HINT:
The diagnostic system in the SIENNA has various
functions.
The first function is the Diagnostic Trouble Code
(DTC) check. A DTC is a code stored in the ECU
memory whenever a malfunction in the signal circuits
to the ECU occurs. In a DTC check, a previous
malfunction's DTC can be ...
Removal
1. REMOVE ENGINE AND TRANSAXLE
HINT:
(See page EM-26)
2. REMOVE AUTOMATIC TRANSMISSION WITH
TRANSFER
HINT:
(See page AX-164)
3. REMOVE NO. 1 TRANSFER CASE PLUG
(a) Remove the No. 1 transfer case plug.
(b) Remove the No. 1 gasket from the transfer case No.
1 plug.
4. REMOVE NO. 2 T ...
