Secondary Air Injection Pump Motor And Relay, 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 

Checking operation 

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

-- Using a jumper, connect Secondary Air Injection (SAI) Pump Relay --J299- - socket 30 to socket 87.

-- The AIR pump should be running.

If the pump does Not operate when using a jumper at the relay: 

Connect a test lamp between terminal 30 of the Secondary Air Injection (SAI) Pump Relay --J299- - socket and ground.

-- The test lamp should turn ON.

-- If the test lamp did Not turn ON, locate the open circuit between Secondary Air Injection (SAI) Pump Relay --J299- - socket 30 and Battery positive connection.

If the test lamp was ON: 

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

-- Using a multimeter, check the Secondary Air Injection (SAI) Pump Motor --V101-- electrical harness connector terminal 2, (which passes through the fuse box) to the Secondary Air Injection (SAI) Pump Relay --J299- - socket 87 for resistance. Refer to Wiring Diagrams.

Specified value: 1.5 ohms max.

If the specified value was Not obtained: 

-- Check the circuit for an open, short or high resistance. If necessary, repair the faulty wiring or connection. Replace any open fuse.

If the specified value was obtained: 

-- Using a multimeter, check the Secondary Air Injection (SAI) Pump Motor --V101-- electrical harness connector, terminal 1 to ground for resistance.

Specified value: 1.5 ohms max.

If the specified value was Not obtained: 

-- Repair the open or high resistance in the ground circuit.

If the specified value was obtained: 

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

If the pump does operate when using a jumper at the relay: 

-- Install the SAI relay.

-- Connect a test lamp to terminal 85 of the Secondary Air Injection (SAI) Pump Relay --J299- - and ground.

-- Turn the ignition On.

-- The test lamp should be ON.

-- Turn the ignition Off.

-- If the test lamp did Not turn on, locate the open circuit between the Secondary Air Injection (SAI) Pump Relay --J299- - terminal 86 and the appropriate fuse. Refer to applicable wiring diagram for fuse positions.

-- If the test lamp does turn ON, remove the Engine Control Module (ECM) -J623-.

-- Using a multimeter, check the SAI pump relay terminal 85 to the Engine Control Module (ECM) -J623- electrical harness connector T105 terminal 60 for resistance or short. Refer to Wiring Diagrams.

Specified value: 1.5 ohms max.

-- If the specified value was not obtained, check for an open, high resistance or short and repair as necessary.

-- If the specified value was obtained, exchange the SAI relay with the ECM power supply relay located next to it.

-- Attempt to start the engine. If the engine does not start, replace the defective relay.

-- Switch the ignition Off.

-- If the engine does start, the relay is OK but the ECM is not providing a ground to turn on the SAI relay. Replace the Engine Control Module (ECM) -J623-.

Final procedures 

After the 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 .
2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .