Secondary Air Injection Solenoid Valve 2, Checking

Secondary Air Injection Solenoid Valve 2, Checking

The following procedure is used to diagnose Secondary Air Injection (AIR) Solenoid Valve 2 (N320) which is controlled by Engine Control Module (ECM) 2 (J624).

Special tools, testers and auxiliary items required

• Multimeter.

• Wiring diagram.

Test requirements

• Fuse (SC3) OK.

• The ignition switched off.

• Voltage for the Secondary Air Injection (AIR) Solenoid Valve 2 (N320) is supplied by the Engine Component Power Supply Relay (J757).

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] Preliminary Check.

Start diagnosis

- Disconnect the Secondary Air Injection (AIR) Solenoid Valve 2 (N320) electrical harness connector - 2 -.





Checking internal resistance

- Using a Multimeter, check the resistance between terminals 1 and 2 of the Secondary Air Injection (AIR) Solenoid Valve 2 (N320).

Specified value: 22,0 to 30,0 ohms.

If the specified value was not obtained:

- Replace the Secondary Air Injection (AIR) Solenoid Valve 2 (N320).

If the specification is obtained:

Checking voltage supply

- Using a Multimeter, check the Secondary Air Injection (AIR) Solenoid Valve 2 (N320) electrical harness connector terminal 1 to Ground (GND) for voltage.





- Operate the starter briefly.

Specified value: battery voltage.

If the specified value was not obtained:

- Check the wiring connection from the Secondary Air Injection (AIR) Solenoid Valve 2 (N320) electrical harness connector terminal 1 to the Engine Component Power Supply Relay (J757) terminal 2/87 for an open circuit a short circuit to Battery positive (+) or to Ground (GND).

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

- If necessary, repair the wiring connection.

If the specified value was obtained:

Check Ground (GND) activation

If the manufacturers test box is being used. Perform the following step.

- Install the test box.

If the manufacturers test box is not being used. Perform the following step.

- Remove the Engine Control Module (ECM) 2 (J624). Refer to => [ Engine Control Module, Replacing ] Engine Control Module, Replacing.

- Using a Multimeter, check the Secondary Air Injection (AIR) Solenoid Valve 2 (N320) electrical connector terminal 2 to the Engine Control Module (ECM) (J623) electrical harness connector T94a terminal 72 for resistance.









Specified value: 1.5 ohms.

If the specification was not obtained:

- Check the wiring for an open circuit, a short circuit to Battery positive (+) or to Ground (GND).

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

- If necessary, repair the wiring connection.

If the specification was obtained:

- Erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

- Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

- End diagnosis.

If the DTC returns and no malfunction is found in the wiring and voltage supply was OK:

- Replace the Engine Control Module (ECM) 2 (J624). Refer to => [ Engine Control Module, Replacing ] Engine Control Module, Replacing.

- Assembly is performed in the reverse of the removal.

Final procedures

After 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 ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.