DTC P26AC-11: Engine Coolant Bypass Valve "B" Circuit Short to Ground; DTC P26AC-15: Engine Coolant Bypass Valve "B" Circuit Short to Battery or Open [08/2020 - ]: Procedure
WARNING: This page is about a different car, the 2021 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK TERMINAL VOLTAGE (POWER SOURCE OF FLOW SHUTTING VALVE (FOR ATF CONTROL))
*a Front view of wire harness connector
(to Flow Shutting Valve (for ATF Control) (No. 1 Water By-pass Hose))- Disconnect the flow shutting valve (for ATF control) (No. 1 water by-pass hose) connector.
- Turn the engine switch on (IG).
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition F3-2 (+FSV) - Body ground Engine switch on (IG) 11 to 14 V Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - FLOW SHUTTING VALVE (FOR ATF CONTROL))
Result:
OK
See step 2
- INSPECT FLOW SHUTTING VALVE (FOR ATF CONTROL) (NO. 1 WATER BY-PASS HOSE)
- Inspect the flow shutting valve (for ATF control) (No. 1 water by-pass hose).
Refer to INSPECTION [08/2020 - ]
Result
Proceed to OK NG
Result:
NG
REPLACE FLOW SHUTTING VALVE (FOR ATF CONTROL) (NO. 1 WATER BY-PASS HOSE). Refer to REMOVAL [08/2020 - ]
Result:
OK
See step 3
- Inspect the flow shutting valve (for ATF control) (No. 1 water by-pass hose).
- CHECK HARNESS AND CONNECTOR (FLOW SHUTTING VALVE (FOR ATF CONTROL) - ECM)
- Disconnect the flow shutting valve (for ATF control) (No. 1 water by-pass hose) connector.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F3-1 (-FSV) - C109-41 (WSV2) Always Below 1 Ω F3-1 (-FSV) or C109-41(WSV2) - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [08/2020 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR