Secondary Air Injection Pump Relay Checking
Special tools and workshop equipment 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 .
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.
| Secondary Air Injection (AIR) Pump Relay -J299- socket terminal | Engine Control Module (ECM) -J623- electrical connector T121 terminal or test box socket |
|---|---|
| 4/86 | 46 |
Specified value: 1.5 Ω 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 .
-- Perform a road test to verify repair.
If the DTC does not return:
Generate readiness code. Refer to READINESS CODE .
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:
- 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 .