Toyota Sienna Service Manual: Check for intermittent problems
1. CHECK FOR INTERMITTENT PROBLEMS
HINT:
For use of the intelligent tester only: Inspect the vehicle's ECM using check mode.
Intermittent problems are easier to detect with an intelligent tester when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.
(a) Clear the DTCs (See page ES-39).
(b) Switch the ECM from normal mode to check mode using an intelligent tester (See page ES-43).
(c) Perform a simulation test (See page IN-35).
(d) Check and wiggle the harness(es), connector(s) and terminal(s) (See page IN-30).
How to proceed with
troubleshooting
HINT:
The intelligent tester can be used in steps 2, 3, 4, 6 and 9.
1 VEHICLE BROUGHT TO WORKSHOP
2 CONNECT INTELLIGENT TESTER TO DLC3
HINT:
If the display indicates a communication fault in th ...
Basic inspection
When a malfunction is not confirmed by the DTC check,
troubleshooting should be carried out in all circuits
considered to be possible causes of the problem. In many
cases, by carrying out the basic ...
Other materials:
Short in Curtain Shield Squib RH Circuit
DTC B1160/83 Short in Curtain Shield Squib RH Circuit
DESCRIPTION
The 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 B1160/83 is record ...
Rear Occupant Classification Sensor LH Circuit
Malfunction
DTC B1782 Rear Occupant Classification Sensor LH Circuit
Malfunction
DESCRIPTION
The rear occupant classification sensor LH circuit consists of the occupant
classification ECU and the rear
occupant classification sensor LH.
DTC B1782 is recorded when a malfunction is detected in the rear oc ...
Engine Control System Malfunction
DTC C1201/51 Engine Control System Malfunction
DESCRIPTION
If trouble occurs the engine control system, the ECM transmits the
abnormality to the skid control ECU.
The skid control ECU set this DTC and the skid control ECU prohibits TRAC and
VSC control.
INSPECTION PROCEDURE
1 CHECK ENGIN ...
