DTC P26C5-18: Exhaust Flow Control Valve "A" Control Circuit Low Circuit Current Below Threshold; DTC P26C5-19: Exhaust Flow Control Valve "A" Control Circuit High Circuit Current Above Threshold [09/2024 - ]: Procedure

Refer to ON-VEHICLE INSPECTION [09/2022 - ]

Result

Result: 

OK 

CHECK FOR INTERMITTENT PROBLEMS 

Refer to CHECK FOR INTERMITTENT PROBLEMS [09/2022 - ]

Result: 

NG 

See step  2

1. Disconnect the exhaust pipe gas control actuator sub-assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O173-3 (RHM+) - C142-5 (EXM+)	Always	Below 1 Ω
   O173-5 (RHM-) - C142-6 (EXM-)	Always	Below 1 Ω
   O173-3 (RHM+) or C142-5 (EXM+) - Body ground and other terminals	Always	10 kΩ or higher
   O173-5 (RHM-) or C142-6 (EXM-) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the exhaust pipe gas control actuator sub-assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O173-3 (RHM+) - O173-5 (RHM-)	20°C (68°F)	0.5 to 50 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY 

Refer to REMOVAL [09/2022 - ]

Result: 

OK 

See step  4

Refer to INSPECTION [09/2022 - ]

Result

Result: 

OK 

REPLACE ECM 

Refer to REMOVAL [09/2024 - ]

Result: 

NG 

REPLACE EXHAUST TAILPIPE ASSEMBLY (EXHAUST CHANGE VALVE) 

Refer to REMOVAL [09/2022 - ]