Inspection Procedure
- INSPECT TRANSMISSION CONTROL ECU ASSY (P CON TERMINAL)
- Check output wave form.
- Turn the power switch on (IG).
- Using an oscilloscope, check the output wave form between terminals PCON (7) and E1 (15) transmission control ECU assy T4 connector.
OK: The output wave form appears as shown in the illustration.
ITEM CONTENTSItem Contents Tool setting 5V / DIV, 20 ms / DIV Vehicle condition Power switch on (IG) Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- OK: REPLACE TRANSMISSION CONTROL ECU ASSY
- NG: GO TO NEXT STEP
- Check output wave form.
- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION CONTROL ECU ASSY)
- Disconnect the T4 connector from the transmission control ECU assy.
- Disconnect the H17 connector from the hybrid vehicle control ECU.
- Measure the resistance according to the value (s) in the table below.
Standard:
HYBRID VEHICLE CONTROL ECU - TRANSMISSION CONTROL ECU ASSY SPECIFIED CONDITIONSTester Connection (Symbols) Condition Specified Condition T4-7 (PCON) - H17-9 (PCON) Always Below 1 Ω T4-7 (PCON) - Body ground Always 10 kΩ or higher Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
- OK: GO TO NEXT STEP
REPLACE HYBRID VEHICLE CONTROL ECU (See HYBRID VEHICLE CONTROL ECU )