Secondary Air Injection Pump Relay, Checking
Special Tools And Workshop Equipment Required
- Multimeter
- Wiring diagram.
Test Requirements
- Secondary Air Injection (AIR) Pump Relay --J299-- fuses OK.
- Motronic 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.
- The ignition switched on.
Test Procedure
-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .
Start Diagnosis
-- Remove the Secondary Air Injection (AIR) Pump Relay -J299-.
Checking voltage
-- Remove the Secondary Air Injection (AIR) Pump Relay -J299-.
-- Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 1 (relay terminal 30) 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 1 (relay terminal 30) to the Battery -- (+) terminal for an open circuit or high resistance.
-- Check the wiring connections for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
If the specified value was obtained:
-- Install the Secondary Air Injection (AIR) Pump Relay -J299-.
Start the engine.
-- Using a multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 2 (relay terminal 87) to ground.
Specified Value: Battery Voltage.
-- Switch the ignition off.
If the specified value was Not obtained:
-- Check the circuit from the Secondary Air Injection (AIR) Pump Relay -J299- socket 2 (relay terminal 87) through fuse 27 in Fuse Box B, out to the Secondary Air Injection (AIR) Pump Motor -V101- connector, terminal 2 for an open circuit or a short circuit to Ground (GND).
-- Check the wiring connections for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection and replace fuse if blown.
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- socket 4 (relay terminal 85) 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 |
|---|---|
| 4/85 | 94 |
Specified Value: 1.5 Ω Max.
If the specified value was Not obtained:
-- Check the wiring for an open circuit, 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.
-- Perform a road test to verify repair.
Final Procedures
After repair work, the following work steps must be performed in the following sequence:
- Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
- If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
- If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .