If The Pump Does Operate When Using A Jumper At The Relay

-- Reinstall the Secondary Air Injection (AIR) Pump Relay - J299 -. Refer to the appropriate service information.

-- Switch the ignition on.

-- Using a test light or Multimeter, check the Secondary Air Injection (AIR) Pump Relay - J299- socket 4/85 to Ground (GND).

Specified value: battery voltage.

-- Switch the ignition off.

If the specified value was Not obtained:

-- Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay - J299- socket 4/85 to Fuse SB23 in Fuse panel B for an open or short circuit.

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

-- If necessary, repair the faulty wiring connection.

-- Repair the circuit and replace any open fuses.

-- Go to Final procedures

If the specified value was obtained:

Checking Ground (GND) activation 

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 appropriate service information.

-- Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay - J299- socket 3/86 to the Engine Control Module (ECM) - J623- electrical harness connector T94 terminal 94 for resistance.

Secondary Air Injection (AIR) Pump Relay -J299- socket terminal	Engine Control Module (ECM) -J623- electrical connector T94 terminal or test box socket
3/86	94

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

-- Check the wiring for a short circuit to Battery voltage, or an open circuit.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

-- Go to Final procedures

If the specified value was obtained:

-- Switch the ignition on.

-- Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay - J299- socket 3/86 to Battery voltage.

Specified value: battery voltage.

If the specified value was obtained:

-- Replace the Secondary Air Injection (AIR) Pump Relay - J299-. Refer to the appropriate service information.

-- Go to Final procedures

If the specified value was Not obtained:

-- Replace the Engine Control Module (ECM) - J623-. Refer to the appropriate service information.

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 .