Secondary Air Injection (AIR) Pump Motor V101 , Checking

Special tools, testers and auxiliary items required 

• Multimeter.
• Wiring diagram.

Test requirements 

• Secondary Air Injection (AIR) Pump Relay J299 OK.
• Fuel Pump (FP) Relay J17 OK.
• Battery voltage at least 12.5 V.
• All electrical consumers switched off (radiator fan must NOT run during test).

• A/C switched off.
• The ignition switched off.

Test procedure 

• Perform a preliminary check to verify the customers complaint. Refer to → General Diagnosis .

Start diagnosis 

• Disconnect the secondary air injection hose - arrow  -.

• Remove the center noise insulation fasteners - 1, 2, 3, 4  - and the center noise insulation panel.

• Disconnect the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector - 3  -.

Checking voltage 

• Start engine momentarily.

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

Specified value: battery voltage.

If the specified value was not obtained:

• Using a Multimeter , check the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminal 2 to Ground (GND).

Specified value: battery voltage.

If the specified value was not obtained:

• Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay J299 socket 2/87 to the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminal 2 for an open circuit or a short circuit.
• Check the electrical harness connector for damage, corrosion, loose or broken terminals.
• If necessary, repair the faulty wiring connection.

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) connection 2 (on left front long member) for resistance.

Specified value: 1.5 Ω Max.

If the specification was not obtained:

• Check the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminal 1 to Ground (GND) connection 2 (on left front long member) for a short circuit to each other, Battery (+), and Ground (GND).
• Check the electrical harness connector for damage, corrosion, loose or broken terminals.
• If necessary, repair the faulty wiring connection.

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

• Replace Secondary Air Injection (AIR) Pump Motor V101. Refer to → 26 EXHAUST SYSTEM, EMISSION CONTROLS .
• Erase the DTC memory. Refer to → Diagnostic Mode 04: Reset/Delete Diagnostic Data .
• Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to → Readiness Code .

• End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was not OK:

• Replace the Secondary Air Injection (AIR) Pump Relay J299.
• 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.
2. If necessary, erase the DTC memory. Refer to Diagnostic Mode 04: Reset/Delete Diagnostic Data .
3. If the DTC memory was erased, generate readiness code. Refer to Readiness Code .

End of diagnosis.