System description
The ecm uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear position (1st, 2nd, 3rd or o/d gear).
Then the ecm compares the actual gear with the shift schedule in the ecm memory to detect mechanical problems of the shift solenoid valves, valve body or automatic transaxle (clutch, brake, gear, etc.).
Monitor description
This dtc indicates a stuck off malfunction of the shift solenoid valve s4, stuck on malfunction of the shift solenoid valve sl2, or brake control valve malfunction. The ecm commands gear shifts by turning the shift solenoid valves on/off. When the gear position commanded by the ecm and the actual gear position are not the same, the ecm illuminates the mil and stores the dtc.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Either of the following conditions is met: off malfunction or on malfunction
2 Detections are necessary per driving cycle: 1st detection: temporary flag on
2Nd detection: pending fault code on
Inspection procedure
Hint:
Performing the intelligent tester's active test allows relay, vsv, actuator and other items to be operated without removing any parts. Performing the active test early in troubleshooting is one way to save time.
The data list can be displayed during the active test.
Hint:
While driving, the shift position can be forcibly changed with the tester.
Comparing the shift position commanded by the active test with the actual shift position enables you to confirm the problem (see page ax-31).
Hint:
Result
Hint:
If any other codes besides p0766 are output, perform troubleshooting for those dtcs first.
Standard resistance:
11 to 15 at 20°c (68°f)
Ok: valve moves and makes operating noise.
Ok: there are no foreign objects on each valve.
Ok: the torque converter clutch operates normally.
Repair or replace automatic transaxle assembly
Utility vehicle
precautions
This vehicle belongs to the utility vehicle class, which has
higher ground clearance and narrower tread in relation to the
height of its center of gravity to make it capable of performing in
a wide variety of off-road applications.
Utility vehicle feature
Specific design characteristics give ...
Symptom confirmation and diagnostic trouble code
Hint:
The diagnostic system in the rav4 has various
functions.
The first function is the diagnostic trouble code
(dtc) check. A dtc is a code stored in the ecu
memory whenever a malfunction in the signal circuits
to the ecu occurs. In a dtc check, a previous
malfunction's dtc can be ch ...
Terminals of ecm
Check ecm
Measure the voltage of the ecm connector.
Hint:
Each ecm terminal's standard voltage is shown in
the table below.
In the table, first follow the information under
"condition". Look under "symbols (terminal no.)"
For the terminals to be inspected. ...