Toyota Sienna Service Manual: Check mode procedure
HINT: Intelligent tester only: Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect the malfunctions that cannot be detected by normal mode.
NOTICE: All the stored DTCs and freeze frame data are erased if:
- the ECM is changed from normal mode to check mode
or vice versa; or 2) the ignition switch is turned off or
turned to the ACC position from the ON position while in
check mode.
Before changing modes, always check and make a note of any DTCs and freeze frame data.
1. CHECK MODE PROCEDURE (Using an intelligent tester)
- Check and ensure the following conditions:
- Battery voltage 12 V or more
- Throttle valve fully closed
- The shift lever in the P or N position
- A/C switched OFF
- Turn the ignition switch off.
- Connect an intelligent tester to the DLC3.
- Turn the ignition switch to the ON position.
- Turn the tester ON.
- Select the following menu items: DIAGNOSIS / ENHANCED OBD II / CHECK MODE.
- Switch the ECM from normal mode to check mode.
- Make sure that the MIL flashes as shown in the illustration.
- Start the engine.
- Make sure that the MIL goes off.
- Simulate the conditions of the malfunction described by the customer.
- Check for DTCs and freeze frame data using the tester.
Freeze frame data
1. DESCRIPTION
The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC
is stored. When troubleshooting, freeze frame data
can be helpful in dete ...
Fail-safe chart
If any of the following DTCs are set, the ECM enters fail-safe
mode to allow the vehicle to be driven temporarily.
HINT:
*1: The vehicle can be driven slowly when the accelerator
ped ...
Other materials:
Front Clearance Sonar Sensor LH Circuit
DESCRIPTION
An ultrasonic sensor consists of a sensor portion that transmits and receives
ultrasonic waves and a preamplifier
that amplifies them. The ultrasonic sensor outputs the ultrasonic waves and
sends the received
signals to the clearance warning ECU.
WIRING DIAGRAM
INSPECTION PROC ...
Problem symptoms table
RESULT LIST OF CHECK CAN BUS LINE
Symptom
Suspected Area
All ECUs and sensors connected to the CAN
communication system are not displayed on intelligent
tester
CAN Bus Line
The result of "CAN BUS WIRE CHECK" is "Open in
CAN Main Bus Lin ...
Operation check
1. CHECK WINDOW LOCK SWITCH
Check that the passenger side power window and
slide door power window operation is disabled when
the window lock switch of the power window master
switch is pressed.
Check that the passenger side power window and
slide door power windows can ...
