DTC P0418: Secondary Air Injection System Control "A" Circuit; DTC P0419: Secondary Air Injection System Control "B" Circuit [08/2015 - 08/2018]: Procedure

1. Disconnect the D35 or D36 air pump connector.
2. Disconnect the D31 or D33 AID connector.
3. Disconnect the cable from the battery positive (+) terminal.
4. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D35-2 (B) - D31-2 (VP)	Always	Below 1 Ω
   D36-2 (+B) - D33-2 (VP2)	Always	Below 1 Ω
   D31-1 (BATT) - Battery positive (+) terminal	Always	Below 1 Ω
   D33-1 (BAT2) - Battery positive (+) terminal	Always	Below 1 Ω
   D35-4 (E) - Body ground	Always	Below 1 Ω
   D36-4 (GND) - Body ground	Always	Below 1 Ω
   D35-2 (B) or D31-2 (VP) - Body ground	Always	10 kΩ or higher
   D36-2 (+B) or D33-2 (VP2) - Body ground	Always	10 kΩ or higher
   D31-1 (BATT) or Positive (+) battery cable - Body ground	Always	10 kΩ or higher
   D33-1 (BAT2) or Positive (+) battery cable - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Start the engine and warm it up.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the ignition switch off.
3. Connect the 400 A probe of an ammeter to the positive (+) wire of the air pump.
4. Connect the Techstream to the DLC3.
5. Turn the ignition switch to ON and turn the Techstream ON.
6. Start the engine.
7. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Manual Mode / AIR PUMP 1: ON, ASV1: OPEN, AIR PUMP 2: ON, ASV2: OPEN and AIR PUMP 1: OFF, ASV1: CLOSE, AIR PUMP 2: OFF, ASV2: CLOSE.

   HINT: 

   When Manual Mode is selected, the Techstream initialization (atmospheric pressure measurement) is performed automatically. The initialization takes 10 seconds. After the initialization, AIR PUMP and ASV operation can be selected.

8. Measure the current while the air pump is on and off.

   Standard Current

   Tester Operation	Air Pump	ASV	Specified Condition
   AIR PUMP: ON, ASV: OPEN	ON	OPEN	10 to 40 A
   AIR PUMP: OFF, ASV: CLOSE	OFF	CLOSE	Below 1 A

   NOTE:

   • This Secondary Air Injection Check only allows technicians to operate the AIR system for a maximum of 5 seconds.

     Furthermore, the check can only be performed up to 4 times per trip. If the test is repeated, intervals of at least 30 seconds are required between checks.

     While AIR system operation using the Techstream is prohibited, the Techstream display indicates the prohibition (WAIT or ERROR).

     If ERROR is displayed on the Techstream during the test, stop the engine for 10 minutes, and then try again.

   • Performing the Secondary Air Injection Check repeatedly may cause damage to the AIR system. If necessary, leave an interval of several minutes between System Check operations to prevent the system from overheating.
   • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned to ON or the engine running.
   • Turn the ignition switch off when the Secondary Air Injection Check operation finishes.

Result: 

OK 

REPLACE AIR INJECTION CONTROL DRIVER 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

NG 

See step  3

1. Replace the air pump (Refer to REMOVAL [08/2015 - 08/2018] ).

Result: 

NEXT 

See step  4

1. Start the engine and warm it up.
2. Turn the ignition switch off.
3. Connect the Techstream to the DLC3.
4. Turn the ignition switch to ON and turn the Techstream ON.
5. Clear DTCs (if set) (Refer to DTC CHECK / CLEAR [08/2015 - 08/2018] ).
6. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Automatic Mode.
7. Start the engine after the Techstream initialization is finished.
8. Perform the System Check operation by pressing Next.
9. After operating the AIR system, perform the following to confirm the AIR system pending codes: Press the Exit button.
10. Check pending DTCs.
11. Turn the ignition switch off.

    OK

    No pending DTC is output.

    NOTE:

    • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned to ON or the engine running.
    • Turn the ignition switch off when the Secondary Air Injection Check operation finishes.

Result: 

OK 

END 

Result: 

NG 

REPLACE AIR INJECTION CONTROL DRIVER 

(Refer to REMOVAL [08/2015 - 08/2018] )