Toyota RAV4 manuals

Toyota Sienna Service Manual: Definition of terms

Term Definition
Monitor description Description of what the ecm monitors and how it detects malfunctions (monitoring purpose and its details).
Related dtcs Diagnostic codeV
Typical enabling condition Preconditions that allow the ecm to detect malfunctions.

With all preconditions satisfied, the ecm sets the dtc when the monitored value(s) exceeds the malfunction threshold(s).

Sequence of operation The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunction.

While another sensor is being monitored, the next sensor or component will not be monitored until the previous monitoring has concluded.

Required sensor/components The sensors and components that are used by the ecm to detect malfunctions.
Frequency of operation The number of times that the ecm checks for malfunctions per driving cycle.

"Once per driving cycle" means that the ecm detects malfunction only one time during a single driving cycle.

"Continuous" means that the ecm detects malfunction every time when enabling condition is met.

Duration The minimum time that the ecm must sense a continuous deviation in the monitored value(s) before setting a dtc. This timing begins after the "typical enabling conditions" are met.
Malfunction thresholds Beyond this value, the ecm will conclude that there is a malfunction and set a dtc.
MIL operation Mil illumination timing after a defect is detected.

"Immediately" means that the ecm illuminates mil the instant the ecm determines that there is a malfunction.

"2 Driving cycle" means that the ecm illuminates mil if the same malfunction is detected again in the 2nd driving cycle.

Component operating range Normal operation range of sensors and solenoids under normal driving conditions.

Use these ranges as a reference.

They cannot be used to judge if a sensor or solenoid is defective or not.V

Parts location

Parts location

System diagram

The configuration of the electronic control system in the U151E automatic transaxles is as shown in the following chart.

System diagram

Precaution
NOTICE: Perform the RESET MEMORY (AT initialization) when replacing the automatic transaxle assembly, engine assembly or ECM (See page AX-16). Perform the REGISTRATION (VIN regi ...

System description
1. SYSTEM DESCRIPTION (a) The ECT (Electronic controlled automatic transmission/transaxle) is an automatic transmission/transaxle that electronically controls shift timing using the ECM. The ECM d ...

Other materials:

Rear Occupant Classification Sensor RH Circuit Malfunction
DTC B1783 Rear Occupant Classification Sensor RH Circuit Malfunction DESCRIPTION The rear occupant classification sensor RH circuit consists of the occupant classification ECU and the rear occupant classification sensor RH. DTC B1783 is recorded when a malfunction is detected in the rear oc ...

Diagnosis system
1. BUS CHECK Select "BUS CHECK" from the "OBD/MOBD MENU" screen. HINT: The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the intelligent tester via the CAN VIM. Press "ENTER" on the intelligent te ...

Removal
1. REMOVE OUTSIDE MOULDING Put protective tape around the outside moulding. Using a heat light, heat the moulding between 40 to 60 C (104 to 140 F). NOTICE: Do not heat the moulding excessively. Tie both piano wire ends to a wooden block or a similar object. Cut off the tape by ...

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