DTC P0412: Secondary Air Injection System Switching Valve "A" Circuit; DTC P0415: Secondary Air Injection System Switching Valve "B" Circuit [08/2015 - 08/2017]: Procedure
WARNING: This page is about a different car, the 2018 Toyota Sequoia, 2017 Toyota Sequoia, and 2016 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT AIR SWITCHING VALVE ASSEMBLY
- Inspect the air switching valve (Refer to INSPECTION [08/2015 - 08/2018]
).RESULT
Result Proceed to OK A NG B
Result:
B
REPLACE AIR SWITCHING VALVE ASSEMBLY
(Refer to REMOVAL [08/2015 - 08/2018] )
Result:
A
See step 2
- Inspect the air switching valve (Refer to INSPECTION [08/2015 - 08/2018]
).
- CHECK HARNESS AND CONNECTOR (AIR SWITCHING VALVE - BODY GROUND)
- Disconnect the D37 or D38 ASV connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition D37-1 (GND) - Body ground Always Below 1 Ω D38-1 (GNDL) - Body ground Always Below 1 Ω
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- CHECK HARNESS AND CONNECTOR (AIR SWITCHING VALVE - AIR INJECTION CONTROL DRIVER)
- Disconnect the D37 or D38 ASV connector.
- Disconnect the D32 or D34 AID connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition D37-5 (+B) - D32-6 (VV) Always Below 1 Ω D38-5 (+BL) - D34-6 (VV2) Always Below 1 Ω D37-5 (+B) or D32-6 (VV) - Body ground Always 10 kΩ or higher D38-5 (+BL) or D34-6 (VV2) - Body ground Always 10 kΩ or higher
Result:
OK
REPLACE AIR INJECTION CONTROL DRIVER
(Refer to REMOVAL [08/2015 - 08/2018] )
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR