DESCRIPTION
PROCEDURE
1. |
CHECK LIN COMMUNICATION SYSTEM |
(a) Check for LIN communication system DTCs related to the power window control
system (See page ).
OK:
LIN communication system DTCs are not output.
NG | ![]() |
GO TO LIN COMMUNICATION SYSTEM |
|
2. |
CHECK POWER WINDOW OPERATION FUNCTION AFTER IGNITION SWITCH OFF |
(a) Check the power window operation function after the ignition switch is turned
off (See page ).
Result |
Proceed to |
---|---|
Front side door is opened within 43 sec. but power windows can still operate |
A |
43 sec. pass and power windows can still operate |
B |
B | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
3. |
READ VALUE USING TECHSTREAM (FRONT DOOR COURTESY LIGHT SWITCH) |
(a) Use the Data List to check if the main body ECU (multiplex network body ECU)
is functioning properly (See page ).
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
FL Door Courtesy SW |
Front door courtesy light switch LH signal / ON or OFF |
ON: Front door LH closed OFF: Front door LH open |
- |
FR Door Courtesy SW |
Front door courtesy light switch RH signal / ON or OFF |
ON: Front door RH closed OFF: Front door RH open |
- |
OK:
On tester screen, each item changes between ON and OFF according to above chart.
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
4. |
CHECK FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY |
(a) Open a front door and check that the map light illuminates (See page
).
OK:
Map light illuminates.
NG | ![]() |
REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY |
|
5. |
CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY |
(a) Temporarily replace the driver side junction block with a new or normally functioning one.
(b) Check that the key-off operation function operates normally.
OK | ![]() |
END (DRIVER SIDE JUNCTION BLOCK ASSEMBLY IS DEFECTIVE) |
NG | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
General Information
GENERAL INFORMATION
A large number of ECU controlled systems are used in the 4RUNNER. In
general, ECU controlled systems are considered to be very intricate, requiring
a high level of technical knowledge to troubleshoot. However, most problem
...
Steering Angle Sensor Internal Circuit (C1433)
DESCRIPTION
Steering angle sensor signals are sent to the skid control ECU via the CAN communication
system. When there is a malfunction in the CAN communication system, it is detected
by the steering angle sensor zero point malfunction diagnostic functio ...