Secondary Air Injection (AIR) Pump Relay -J299- , checking

Special tools, testers and auxiliary items required 

• Multimeter.
• Wiring diagram.

Test requirements 

• The Secondary Air Injection (AIR) Pump Relay -J299- fuses OK.
• The Fuse (on fuse panel) S243 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.

Procedure 

• Remove the Secondary Air Injection (AIR) Pump Relay -J299-.

Checking voltage 

• Using a Multimeter , check the Secondary Air Injection (AIR) Pump Relay -J299- socket 1/30 to Ground (GND).
• Switch ignition On.

Specified value: battery voltage.

If the specified value was not obtained:

• Switch ignition off.
• Check the wiring connections from the Battery to the Secondary Air Injection (AIR) Pump Relay -J299- socket 1/30 for an open circuit or a short circuit.
• Check the wiring connections for damage, corrosion, loose or broken terminals.
• If necessary, repair the faulty wiring connection.

If the specified value was obtained:

• Reinstall the Secondary Air Injection (AIR) Pump Relay -J299-.
• Switch the ignition on.
• Using a Multimeter , check the Fuse (on fuse panel) S243 to Secondary Air Injection (AIR) Pump Relay -J299- socket 3/85 for voltage.

Specified value: battery voltage.

• Switch the ignition off.

If the specified value was not obtained:

• Check the wiring connections for damage, corrosion, loose or broken terminals.
• If necessary, repair the faulty wiring connection.

If the specified value was obtained:

Checking activation 

• Switch the ignition on.
• Using a Multimeter , check the Secondary Air Injection (AIR) Pump Relay -J299- socket 2/87 to Ground (GND)

Specified value: battery voltage.

• Switch the ignition off.

If the specified value was not obtained:

• Check the wiring connections for damage, corrosion, loose or broken terminals.
• If necessary, repair the faulty wiring connection.

If the specified value was obtained:

Checking wiring 

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

• Install the Adapter F/VAG1598 (68 Pin) VAG1598/22. Refer to 24 MULTIPORT FUEL INJECTION (MFI) .

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

• Remove the Motronic Engine Control Module (ECM) J220. → Motronic Engine Control Module (ECM) J220 , replacing  .
• Using a Multimeter , check the Secondary Air Injection (AIR) Pump Relay -J299- socket 4/86 to the Motronic Engine Control Module (ECM) J220 electrical harness connector T80 terminal 30 for resistance.

Specified value: 1.5 Ω Max.

If the specification was not obtained:

• Check the wiring 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 the Secondary Air Injection (AIR) Pump Relay -J299-.
• 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 OK:

• Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing  .
• Assembly is performed in the reverse of the removal.

Final procedures 

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

1. Check the DTC memory. Refer to.
2. If necessary, erase the DTC memory. Refer to.
3. If the DTC memory was erased, generate readiness code. Refer to.

End of diagnosis