Toyota Sienna Service Manual: How to proceed with troubleshooting
HINT:
- Use the following procedures to troubleshoot the cruise control system.
- *: Use the intelligent tester.
1 VEHICLE BROUGHT TO WORKSHOP
2 PROBLEM SYMPTOM CONFIRMATION
3 CHECK MULTIPLEX COMMUNICATION SYSTEM*
Refer to HOW TO PROCEED WITH TROUBLESHOOTING.
- Check for output DTCs.
Result
HINT: The ECM of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.
4 CHECK CAN COMMUNICATION SYSTEM*
Refer to PRECAUTION.
- Check for output DTCs.
Result
HINT: The ECM of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.
5 DTC CHECK AND CLEAR*
Refer to DTC CHECK / CLEAR
6 DTC CHECK (OTHER THAN MPX AND CAN SYSTEM DTC)*
Result
7 DTC CHART
Refer to DIAGNOSTIC TROUBLE CODE CHART
8 PROBLEM SYMPTOM CONFIRMATION
Result
9 SYMPTOM SIMULATION
Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE
10 PROBLEM SYMPTOMS TABLE
Refer to PROBLEM SYMPTOMS TABLE
11 CIRCUIT INSPECTION
12 TERMINALS OF ECM
Refer to TERMINALS OF ECM
13 IDENTIFICATION OF PROBLEM
14 REPAIR OR REPLACE
15 CONFIRMATION TEST
END
System description
1. CRUISE CONTROL SYSTEM
This system is controlled by the ECM, and is activated by
the throttle position sensor and motor. The ECM controls
the following functions: ON-OFF, - (COAST)/SET, +
(ACCEL ...
Road test
1. PROBLEM SYMPTOM CONFIRMATION
Inspect the SET function.
Turn the cruise control main switch on.
Drive at the required speed between 40 km/h
(25 mph) and 200 km/h ...
Other materials:
Installation with LATCH system (second seat)
Fold the seatback while pulling
the lever and move to the rearmost
recline position.
Widen the gap between the seat cushion and seatback slightly.
Type A
Latch the hooks of the lower
straps onto the LATCH
anchors. If the child restraint
has a top tether strap, the ...
Intake Air Temperature Sensor Gradient Too
High
DTC P0111 Intake Air Temperature Sensor Gradient Too
High
DESCRIPTION
The Intake Air Temperature (IAT) sensor, mounted on the Mass Air Flow (MAF)
meter, monitors the IAT.
The IAT sensor has a built-in thermistor with a resistance that varies according
to the temperature of the
intake ...
Problem symptoms table
HINT:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "Suspect Area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed ...
