Secondary Air Injection Pump Relay Checking

Secondary Air Injection Pump Relay Checking

Special tools, testers and auxiliary items required

• Multimeter.

• Wiring diagram.

Test requirements

• Fuse (SB29) OK.

• Fuse (SB51) OK.

• The Power Supply Relay (terminal 30, B+) (J317) fuse OK.

• Battery voltage at least 12.5 V.

• All electrical consumers switched off.

• A/C switched off.

• The ignition switched off.

Test procedure

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

Start diagnosis

- 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.

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 1/30 to TV2 (terminal 30 Junction) for an open circuit, a short circuit to each other, Battery (+) and Ground.

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

- If necessary, repair the faulty wiring connection.

If the specified value was obtained:

- Switch the ignition On.

- Using a multimeter, check the Secondary Air Injection (AIR) Pump Relay (J299) socket 3/85 to Ground for voltage.

Specified value: Battery voltage.

- Switch the ignition Off.

If the specified value was Not obtained:

- Check the wiring connection from the Power Supply Relay (terminal 30, B+) (J317) socket 87 to the Secondary Air Injection (AIR) Pump Relay (J299) socket 3/85 for an open circuit, high resistance, a short circuit to each other, Battery (+) and Ground.

- 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 test box.

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

- Remove the Engine Control Module (ECM) (J623). Refer to the Repair Information.

- Using a multimeter, check the Secondary Air Injection (AIR) Pump Relay (J299) to the Engine Control Module (ECM) (J623) electrical harness connector T121 for resistance.






Specified value: 1.5 ohms Max.

If the specification was Not obtained:

- Check the wiring for an open circuit, high resistance, a short circuit to each other, Battery (+) and Ground.

- 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 - Erase DTC Memory ] Diagnostic Modes 01 - 09.

- Perform a road test to verify repair.

If the DTC does not return:

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

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

- Replace the Engine Control Module (ECM) (J623). Refer to the Repair Information.

- 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 Modes 01 - 09.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 09.

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