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Secondary Air Injection Sensor 1, Checking

Special Tools And Workshop Equipment Required 

Test Requirements 

Test Procedure 

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK 

Start Diagnosis 

-- Remove the engine cover with air filter.

Checking Voltage 

-- Disconnect the Secondary Air Injection Sensor 1 -G609- electrical harness connector.

-- Switch the ignition ON.

-- Using a multimeter, check the Secondary Air Injection Sensor 1 -G609- electrical harness connector using the chart below.

Secondary Air Injection Sensor 1 -G609- electrical harness connector terminals: Specified value:
1 to Battery Positive Battery Voltage
3 to Ground near 5 V
4 to ECM pin T60/55 1.5 Ω Max.

-- Switch the ignition OFF.

If The Specified Values Were Obtained: 

-- Replace the Secondary Air Injection Sensor 1 -G609-.

If The Specified Value Was Not Obtained: 

Checking wiring connections

-- Remove the Engine Control Module (ECM) -J623-.

-- Using a multimeter, check the Secondary Air Injection Sensor 1 -G609- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for an open circuit. Refer to Appropriate System Diagrams for pin locations.

Secondary Air Injection Sensor 1 -G609- electrical harness connector terminals: Engine Control Module (ECM) -J623- electrical connector T60 terminals:
1 13
3 44
4 55

Specified Value: 1.5 Ω Max. 

If The Specified Value Was Not Obtained: 

-- Check the wiring for an open, high resistance or short to ground.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If No Malfunction Is Detected In The Wiring: 

-- Replace the Engine Control Module (ECM) -J623-.

-- Install the engine cover with air filter.

Final Procedures 

After the repair work, the following work steps must be performed in the following sequence:

  1. Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
  2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
  3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .