DTC P0606-29: Backup Boost Converter "A" Control CPU Signal Invalid [11/2016 - ]: Procedure
WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BATTERY)
*a Front view of wire harness connector
(to Engine Stop and Start ECU)- Disconnect the engine stop and start ECU connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition A91-1 (BIN2) - Body ground Always 9.5 to 14 V A91-3 (BIN1) - Body ground Always 9.5 to 14 V Result
Proceed to OK NG
Result: 2
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result: 1
OK
See step 2
- CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
- Disconnect the engine stop and start ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A91-2 (GND2) - Body ground Always Below 1 Ω A91-8 (GND1) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Result: 1
OK
REPLACE ENGINE STOP AND START ECU. Refer to REMOVAL [11/2016 - ]
Result: 2
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR