Toyota Sienna Service Manual: How to proceed with troubleshooting
HINT:
- Use the following procedures to troubleshoot the dynamic laser cruise control system.
- *: Use the intelligent tester
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
3 PROBLEM SYMPTOM CONFIRMATION
Result
SYMPTOM SIMULATION
4 INSPECT BATTERY VOLTAGE
Standard voltage: 11 to 14 V
If the voltage is below 11 V, replace or recharge the battery before proceeding.
5 CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)
- Use the intelligent tester to check if the multiplex communication system (MPX) is functioning normally.
Result
6 CHECK COMMUNICATION FUNCTION OF CONTROLLER AREA NETWORK (CAN)
- Use the intelligent tester to check for normal function of the CAN communication system.
- Check for DTCs.
Result
7 DTC CHECK
Result
8 DTC CHART
9 PROBLEM SYMPTOMS TABLE
10 CIRCUIT INSPECTION
11 TERMINALS OF ECM
12 IDENTIFICATION OF PROBLEM
13 REPAIR OR REPLACE
14 CONFIRMATION TEST
END
System description
1. GENERAL
The dynamic laser cruise control system has two
cruise control modes: the constant speed control
mode and vehicle-to-vehicle distance control mode.
The vehicle-to- ...
Road test
1. PROBLEM SYMPTOM CONFIRMATION
HINT:
The dynamic laser cruise control system has two cruise
control modes: the constant speed control mode and
vehicle-to-vehicle distance control mode.
...
Other materials:
Security Horn Circuit
DESCRIPTION
During the alarm sounding state, the relay in the ECU turns on and off in a
cycle of approximately 0.2
seconds, causing the security horn to sound.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT SECURITY HORN ASSEMBLY
Disconnect the T1 security horn connector.
C ...
Warning lights and
indicators
The warning lights and indicators on the instrument cluster and
center panel inform the driver of the status of the vehicle’s various
systems.
For the purpose of explanation, the following illustration displays
all warning lights and indicators illuminated.
Vehicles with monochrome displ ...
Problem symptoms table
If there are no DTCs output but the problem still occurs,
check the circuits for each problem symptom in the order
given in the table below and proceed to the relevant
troubleshooting page.
NOTICE:
When replacing the brake actuator assembly, sensor,
etc., turn the ignition switch off.
HINT:
...
