Air Injection Pump: Testing and Inspection

SECONDARY AIR INJECTION (AIR) PUMP INSPECTION [13B-MSP]

Discharging Pressure Inspection

Using M-MDS

1. Remove the air hose between the AIR pump and AIR control valve at the AIR control valve side.

2. Install the SST on the AIR control side using tape to prevent air leakage.






3. Start the engine, turn all electrical loads off, and idle the engine after completely warming it up.

4. Connect the M-MDS to the DLC-2.






5. Turn the PID "AIP RLY" from off to on position using the simulation function. On-Board Diagnostic Test

CAUTION:
- When connecting the secondary air injection pump relay to the body ground, short the specified terminal, because shorting the wrong terminal may cause malfunctions.
- Do not operate the secondary air injection pump for more than 1 min. to avoid damaging the pump.
- Stop the engine and wait for 1 h or more after energization of the secondary air injection pump to allow it to cool down before operating it again.

6. Verify that the discharging pressure of the AIR pump is within the specification.

- If not within the specification, inspect the following:

- PCM terminal 1G and AIR pump relay terminal A
- AIR pump relay

- If it is within the specification, inspect the continuity for the AIR pump.

Discharging pressure
- 6-12 kPa {0.07-0.12 kgf/cm2, 0.9-1.7 psi} [15-35 °C {59-95 °F}]

Without using M-MDS

1. Remove the air hose between the AIR pump and AIR control valve at the AIR control valve side.

2. Install the SST on the AIR control side using tape to prevent air leakage.






3. Position the PCM out of the way with the connects still connected. Service and Repair

4. Start the engine, turn all electrical loads off, and idle the engine after completely warming it up.

5. Connect the AIR pump relay terminal A to the ground, and operate the AIR pump.

CAUTION:
- When connecting the secondary air injection pump relay to the body ground, short the specified terminal, because shorting the wrong terminal may cause malfunctions.
- Do not operate the secondary air injection pump for more than 1 min. to avoid damaging the pump.
- Stop the engine and wait for 1 h or more after energization of the secondary air injection pump to allow it to cool down before operating it again.

6. Verify that the discharging pressure of the AIR pump is within the specification.






- If not within the specification, inspect the following:

- AIR pump relay

- If it is within the specification, inspect the continuity for the AIR pump.

Discharging pressure
- 6-12 kPa {0.07-0.12 kgf/cm2, 0.9-1.7 psi} [15-35 °C {59-95 °F}]

Continuity Inspection

1. Disconnect the negative battery cable.

2. Disconnect the AIR pump connector.

3. Inspect for continuity between the AIR pump terminals A and B.






- If there is no continuity, replace the AIR pump. Service and Repair