Dtc P0416 Secondary Air Injection System Switching Valve B Circuit Open


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT AIR INJECTION VSV RELAY (AI-VSV)

CHECK AIR INJECTION VSV RELAY (AI-VSV) (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION VSV RELAY (AI-VSV))

DTC P0416 Secondary Air Injection System Switching Valve "B" Circuit Open

DTC P0417 Secondary Air Injection System Switching Valve "B" Circuit Shorted


DESCRIPTION

The ECM operates the air injection VSV relay (AI-VSV) which causes the No. 2 emission control valve set to operate.

DTC No.
DTC Detection Condition
Trouble Area
P0416
Open or short in the air injection VSV relay (AI-VSV) circuit for 3 seconds (1 trip detection logic).
  1. Open or short in air injection VSV relay (AI-VSV) circuit
  2. Air injection VSV relay (AI-VSV)
  3. ECM
P0417
Open or short in the air injection VSV relay (AI-VSV) circuit for 3 seconds (1 trip detection logic).
  1. Open or short in air injection VSV relay (AI-VSV) circuit
  2. Air injection VSV relay (AI-VSV)
  3. ECM

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P0416 Secondary Air Injection System Switching Valve B Circuit Open


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses of circuits related to this system before performing the following inspection procedure.
HINT:
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.INSPECT AIR INJECTION VSV RELAY (AI-VSV)

  1. Inspect the air injection VSV relay (AI-VSV) (LandCruiser RM000003BLB03QX_01_0017.html).



NG
REPLACE AIR INJECTION VSV RELAY (AI-VSV)
OK


2.CHECK AIR INJECTION VSV RELAY (AI-VSV) (POWER SOURCE)

  1. Remove the air injection VSV relay (AI-VSV).

  1. Turn the engine switch on (IG).



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P0416 Secondary Air Injection System Switching Valve B Circuit Open

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Air injection VSV relay (AI-VSV) terminal 1 - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    Air injection VSV relay (AI-VSV) terminal 3 - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *1
    		Engine Room Relay Block
    *2
    		Air Injection VSV Relay (AI-VSV)

  1. Reinstall the air injection VSV relay (AI-VSV).



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION VSV RELAY (AI-VSV))

  1. Remove the air injection VSV relay (AI-VSV).

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    Air injection VSV relay (AI-VSV) terminal 2 - G56-24 (AIR1)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    Air injection VSV relay (AI-VSV) terminal 2 or G56-24 (AIR1) - Body ground
    		Always
    		10 kΩ or higher

  1. Reinstall the air injection VSV relay (AI-VSV).

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (LandCruiser RM00000329203TX.html)