Toyota Sienna Service Manual: Terminals of ECU
1. CHECK POWER BACK DOOR ECU
- Disconnect the P13 and P14 ECU connectors, and check the voltage or resistance of each terminal of the wire harness side connectors
If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the ECU connectors, and check the voltage of each terminal of the connectors.
*1 Satellite switch (Back door)
*2 Transmitter switch (Back door)
*3 When all the conditions listed below are met, the
warning buzzer sounds.
- Ignition switch is turned ON
- Shift lever is moved into any position except P position
- Back door is open or power back door system is activated to open
*4 When any condition listed below is met, the warning buzzer turns off.
- Shift lever is moved into P position
- Back door is fully closed
HINT: Use an oscilloscope to check the output voltages of the power back door main switch, buzzer and pulse sensor.
If the result is not as specified, the ECU may have a malfunction.
Problem symptoms table
POWER BACK DOOR SYSTEM
Symptom
Suspected Area
Power back door does not operate when switch* is
pressed (* Switch indicates the satellite switch for
power back door)
...
Diagnosis system
1. CHECK DLC3
The vehicle's ECU uses ISO 15765-4 for
communication protocol. The terminal arrangement
of the DLC3 complies with SAE J1962 and matches
the ISO 15765-4 format.
NOTICE: ...
Other materials:
Short to B+ in Curtain Shield Squib LH Circuit
DTC B1168/86 Short to B+ in Curtain Shield Squib LH Circuit
DESCRIPTION
The curtain shield squib LH circuit consists of the center airbag sensor
assembly and the curtain shield
airbag assembly LH.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1168/86 is ...
Diagnosis system
1. DESCRIPTION
When troubleshooting a vehicle with the diagnosis
system, the only difference from the usual
troubleshooting procedure is connecting the
intelligent tester to the vehicle and reading various
data output from the vehicle's clearance warning
ECU.
The clearance warn ...
Short in Rear Curtain Shield Squib RH Circuit
DTC B1630/83 Short in Rear Curtain Shield Squib RH Circuit
DESCRIPTION
The rear curtain shield squib RH circuit consists of the center airbag sensor
assembly and the curtain
shield airbag assembly RH.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1630/83 ...
