Toyota Sienna Service Manual: Check for short circuit
(a) If the wire harness is ground shorted (Fig. 5), locate the section by conducting a resistance check with the body ground (below).
(b) Check the resistance with the body ground.
(1) Disconnect connectors A and C and measure the resistance.
Standard resistance (Fig. 6)
HINT:
Measure the resistance while lightly shaking the wire harness vertically and horizontally. If your results match the examples above, an open circuit exists between terminal 1 of connector A and terminal 1 of connector C.
(2) Disconnect connector B and measure the resistance.
Standard resistance (Fig. 7)
If the results match the examples above, a short circuit exists between terminal 1 of connector B2 and terminal 1 of connector C.
Check for open circuit
(a) For an open circuit in the wire harness in Fig. 1, the resistance or
voltage, as described below.
(b) Check the resistance.
Check the resistance
Standard resistance (Fig. 2)
...
Check and replace ecu
NOTICE: • The connector should not be disconnected from
the ECU. Perform the inspection from the
backside of the connector on the wire harness
side.
• When no measuring condition is s ...
Other materials:
Safety Connect
Safety Connect is a subscription-based telematics service that
uses Global Positioning System (GPS) data and embedded cellular
technology to provide safety and security features to subscribers.
Safety Connect is supported by Toyota’s designated
response center, which operates 24 hours per da ...
How to proceed with
troubleshooting
HINT:
Use these procedures to troubleshoot the power door lock
control system.
The intelligent tester should be used in steps 3 and 5.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
Interview the customer to confirm the trouble
3 INSPECT COMMUNICATION FUNCTI ...
Solar Sensor Circuit (Passenger Side)
DTC B1421/21 Solar Sensor Circuit (Passenger Side)
DESCRIPTION
The solar sensor, which is installed on the upper side of the instrument
panel, detects sunlight and
controls the air conditioning in AUTO mode. The output voltage from the solar
sensor varies according to
the amount of sunli ...
