Secondary Air Injection Pump Motor, Checking

Special tools and workshop equipment required

Multimeter.
Wiring diagram.

Test requirements

The Secondary Air Injection (SAI) Pump Relay --J299-- fuses OK.
The Engine Control Module (ECM) Power Supply Relay -J271- fuse OK.
Battery voltage at least 12.5 V.
All electrical consumers switched off.
A/C switched off.

Test procedure

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

Start diagnosis

NOTE:

The engine MUST be cold (room temperature) in order for the ECM to command the air pump relay ON. The pump runs for approximately 70 seconds. Once the engine has been started and gone into closed loop, the ECM will not command the pump to run again for approx 6-8 hrs of Off time. Due to potential damage to the catalyst, the generic scan tool has no provision for SAI relay control.

-- Disconnect the Secondary Air Injection (SAI) Pump Motor --V101-- connector.

Checking voltage

-- Switch the ignition On.

-- Using a Multimeter check the Secondary Air Injection (AIR) Pump Motor --V101-- electrical harness connector terminals 1 to 2 for voltage.

Specified value: Battery voltage.

-- Switch the ignition Off.

If the specified value was obtained:

-- Replace the Secondary Air Injection (AIR) Pump Motor --V101--. Refer to Repair Service Information.

-- Go to Final procedures

If the specified value was not obtained:

-- Using a Multimeter check the wiring connection from the Secondary Air Injection (AIR) Pump Relay --J299-- socket terminal 5/87 to the Secondary Air Injection (AIR) Pump Motor --V101-- electrical harness connector terminal 2 for resistance.

Specified value: 1.5 Ω Max.

If the specified value was not obtained:

-- Check the wiring connection for an open circuit, short circuit to Battery positive or Ground

-- Check the wiring connection for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection and replace any open fuses.

-- Go to Final procedures

If the specified value was obtained:

Checking Ground (GND)

-- Using a Multimeter check the Secondary Air Injection (AIR) Pump Motor --V101-- electrical harness connector terminal 1 to Ground (GND) for resistance.

Specified value: 1.5 Ω Max.

If the specified value was not obtained:

-- Check the wiring for a short circuit to each other, Battery voltage and Ground (GND).

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

-- If necessary, repair the faulty wiring connection.

If the specified value was obtained:

-- Replace the Secondary Air Injection (AIR) Pump Motor --V101--. Refer to Repair Service Information.

Final procedures

-- Assembly is performed in the reverse order of removal.

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

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