Receives the signal from the output shaft speed sensor
used for the A/T control and converts it to the vehicle speed signal, and then inputs it to
the engine control system and speedometer.
TROUBLE JUDGMENT
Check Conditions
After 2 seconds pass from when the engine has completed the starting.
The engine speed is 2, 500 - 4, 000 r/min.
Under the high load operation.
Judgment Criterion
The output shaft speed sensor output voltage does not vary for 4 seconds (The plus
signal is not input).
PROBABLE CAUSE
Failed output shaft speed sensor
Open/short circuit in output shaft speed sensor circuit or loose connector contact
Failed engine-A/T-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III other system diagnosis codes
Confirm whether the diagnosis codes are output from A/T system.
Q.
Is the diagnosis code output for A/T system?
Check A/T system (Refer to GROUP 23A - Troubleshooting - Check
chart for diagnosis code ).
Go to Step 2 .
STEP 2. M.U.T.-III diagnosis code
Reconfirmation of diagnosis code.
Q.
Is the diagnosis code set?
Replace engine-A/T-ECU.
Intermittent malfunction (Refer to, GROUP 00 - How to Use Troubleshooting/Inspection
Service Points ).