Secondary Air Injection Pump Relay, Checking
Observe all safety precautions: SAFETY PRECAUTIONS
View clean working conditions: CLEAN WORKING CONDITIONS
Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.
For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.
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 off.
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-. Refer to the appropriate service information.
Checking voltage
-- Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 3 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 1/30 to the Battery -A- (+) terminal 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.
If the specified value was obtained:
-- Switch the ignition on.
-- Using a multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 5 to Ground (GND) for voltage.
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 2/87 to the Secondary Air Injection (AIR) Pump Motor -V101- socket 2 for an open 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:
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 appropriate service information.
-- Using a multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 4/85 to the Engine Control Module (ECM) -J623- electrical harness connector T91 for resistance.
| Secondary Air Injection (AIR) Pump Relay -J299- socket terminal | Engine Control Module (ECM) -J623- electrical connector T91 terminal |
|---|---|
| 2 | 54 |
Specified value: 1.5 Ω Max.
If the specification was not obtained:
-- Check the wiring for a short circuit to Battery (+), or an open circuit.
-- 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-. Refer to the appropriate service information.
-- Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
-- Perform a road test to verify repair.
If the DTC does not return:
Generate readiness code. Refer to READINESS CODE .
If the DTC returns and no malfunction is found in the wiring and the voltage supply was OK:
-- Replace the Engine Control Module (ECM) -J623-. Refer to the appropriate service information.
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 .