Flow Too Low: Permanent Fault
Flow too low: Permanent fault
EFI-448 Pulsed secondary air injection system (PAIR) pump, flow fault
Checking pulsed secondary air injection system (PAIR) pump
- Ignition on.
- Select Volvo Scan Tool (ST) to activate pulsed secondary air injection system (PAIR) pump.
The relay should click and the pulsed secondary air injection system (PAIR) pump should start.
OK - Checking pulsed secondary air injection system (PAIR) valve
Not OK - Checking pulsed secondary air injection system (PAIR) pump power supply
-------------------------------------------------
Checking pulsed secondary air injection system (PAIR) pump power supply
- Ignition off.
- Disconnect connector C from pulsed secondary air injection system (PAIR) pump relay.
- Connect a voltmeter between pulsed secondary air injection system (PAIR) pump relay terminal C2 and ground.
Note! Do not connect to ground in the sub-frame, it is insulated from the car body.
- Ignition on.
- Select Volvo Scan Tool (ST) to activate pulsed secondary air injection system (PAIR) pump.
The voltmeter should oscillate between battery voltage and 0 V with a 3 second interval.
OK - Checking pulsed secondary air injection system (PAIR) pump resistance
Not OK - Replacing component
Try a new pulsed secondary air injection system (PAIR) pump relay. Then continue with Verification.
-------------------------------------------------
Replacing component
- Try a new pulsed secondary air injection system (PAIR) pump relay.
Continue - Verification
-------------------------------------------------
Checking pulsed secondary air injection system (PAIR) pump resistance
- Ignition off.
- Disconnect connector C from pulsed secondary air injection system (PAIR) pump relay.
- Ignition on.
Connect an ohmmeter between pulsed secondary air injection system (PAIR) pump connector C terminal 2 and ground.
Note! Do not connect to ground on the sub-frame, it is insulated from the car body.
The ohmmeter should read approximately 0.5-2 ohms.
OK - Replacing component
Try a new pulsed secondary air injection system (PAIR) pump. Then continue with Verification.
Not OK - Checking pulsed secondary air injection system (PAIR) pump ground terminal
-------------------------------------------------
Replacing component
- Try a new pulsed secondary air injection system (PAIR) pump.
Continue - Verification
-------------------------------------------------
Checking pulsed secondary air injection system (PAIR) pump ground terminal
- Ignition off.
- Pulsed secondary air injection system (PAIR) pump disconnected.
- Check pulsed secondary air injection system (PAIR) pump ground terminal 31/44 for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Connect an ohmmeter between pulsed secondary air injection system (PAIR) pump connector terminal 2 and ground.
The ohmmeter should read approximately 0.5-2 ohms.
OK - The cause of the diagnostic trouble code (DTC) has been loose connections in the pulsed secondary air injection system (PAIR) pump ground terminal. Then continue with Verification.
Fault-tracing information
Not OK - Replacing component
Try a new pulsed secondary air injection system (PAIR) pump. Then continue with Verification.
-------------------------------------------------
Fault-tracing information
The cause of the diagnostic trouble code (DTC) has been loose connections in the pulsed secondary air injection system (PAIR) pump ground terminal.
Continue - Verification
-------------------------------------------------
Checking pulsed secondary air injection system (PAIR) valve
- Ignition off.
- Disconnect pulsed secondary air injection system (PAIR) valve from pipe, leave hoses in place.
- Carefully disconnect the lilac hose from the pulsed secondary air injection system (PAIR) valve.
- Connect a vacuum pump to the pulsed secondary air injection system (PAIR) valve.
- Ignition on.
- Select Volvo Scan Tool (ST) to activate pulsed secondary air injection system (PAIR) pump.
Air should escape from the pulsed secondary air injection system (PAIR) valve outlet when the pump is operating.
OK - Checking pulsed secondary air injection system (PAIR) pipe
Not OK - Checking pulsed secondary air injection system (PAIR) hose
-------------------------------------------------
Checking pulsed secondary air injection system (PAIR) pipe
- Pulsed secondary air injection system (PAIR) valve off.
Caution! If the car has been driven recently the exhaust system can be very hot, let it cool down a little. Otherwise the special tool may get burnt.
- Remove the exhaust tail pipe.
- Install tool 999 5546 ADAPTOR 999 5546 Adapter with pressure regulator 999 5544 REGULATOR 999 5544 Regulator on the exhaust system.
- Adjust pressure to 0.4 bar . Depending on the condition of the exhaust system a lower pressure may be necessary.
Feel to see if air is escaping from the pulsed secondary air injection system (PAIR) pipe.
Is air escaping?
Yes - Checking vacuum hoses
No - Clean the pulsed secondary air injection system (PAIR) pipe and its connector to the manifold. Then continue with Verification.
Cleaning
-------------------------------------------------
Cleaning
- Clean the pulsed secondary air injection system (PAIR) pipe and its connector to the manifold.
Continue - Verification
-------------------------------------------------
Checking vacuum hoses
- Ignition off.
- Reinstall pulsed secondary air injection system (PAIR) valve (use a new gasket).
- Carefully disconnect the white hose from the solenoid valve.
- Start the engine and idle it.
Check to see if there is a vacuum in the hose.
There should be a vacuum in the hose.
OK - Checking lilac hose
Not OK - Check to ensure that the white hose, check valve and connector in the intake manifold are not blocked. Then continue with Verification.
Check
-------------------------------------------------
Check
- Check to ensure that the white hose, check valve and connector in the connector pipe are not blocked.
Continue - Verification
-------------------------------------------------
Checking lilac hose
- Ignition off.
- Disconnect the lilac hose between the solenoid valve and pulsed secondary air injection system (PAIR) valve.
- Check the lilac hose. It must not leak or be blocked.
Check the lilac hose.
It must not leak or be blocked.
OK - Replacing component
Try a new solenoid valve. Then continue with Verification.
Not OK - Repairing hose
Remedy or replace hose. Then continue with Verification.
-------------------------------------------------
Replacing component
- Try a new solenoid valve.
Continue - Verification
-------------------------------------------------
Repairing hose
- Remedy or replace hose.
Continue - Verification
-------------------------------------------------
Checking pulsed secondary air injection system (PAIR) hose
- Ignition off.
- Carefully disconnect the pulsed secondary air injection system (PAIR) hose from the pulsed secondary air injection system (PAIR) valve.
- Ignition on.
- Select Volvo Scan Tool (ST) to activate pulsed secondary air injection system (PAIR) pump.
- Feel at the end of the hose.
Air should escape when the pump is operating.
OK - Replacing component
Try a new pulsed secondary air injection system (PAIR) valve. Then continue with Verification.
Not OK - Checking hoses
-------------------------------------------------
Replacing component
- Try a new pulsed secondary air injection system (PAIR) valve.
Continue - Verification
-------------------------------------------------
Checking hoses
- Ignition off.
- Carefully disconnect the hose between the pulsed secondary air injection system (PAIR) pump and the pulsed secondary air injection system (PAIR) valve.
Check that the hose is not blocked or leaking, check that the hose to the pulsed secondary air injection system (PAIR) pump is not blocked.
Are the hoses in order?
Yes - Replacing component
Try a new pulsed secondary air injection system (PAIR) pump. Then continue with Verification.
No - Replacing component
Remedy or replace faulty hoses. Then continue with Verification.
-------------------------------------------------
Replacing component
- Remedy or replace faulty hoses.
Continue - Verification
-------------------------------------------------
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition off.
- Reinstall all hoses/components.
- Ignition on.
- Select Volvo Scan Tool (ST) to erase diagnostic trouble codes (DTCs).
Continue - Verification, continued
------------------------
Verification, continued
- Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode.
- Run the engine to normal operating temperature (over 70°C).
- Air conditioning (A/C) off.
- Gear selector in P or N.
- Let engine idle.
- Go into the Diagnostic Test Mode (DTM) menu. Activate PAIR diagnostic.
- Wait until the diagnostic is complete. This can take up to 2 minutes.
Note! If the texts START CONDITIONS NOT MET or DIAGNOSTIC INTERRUPTED are displayed the diagnostic cannot be carried out. This can have several causes: for example. The short-term fuel trim is unstable, the long-term fuel trim is at an end position, the engine coolant temperature (ECT) is over 103°C or that a diagnostic trouble code (DTC) has been set after the diagnostic has been set. Check that no diagnostic trouble codes (DTCs) are stored, restart the car and try to activate the diagnostic again. Sometimes several attempts will have to be made before the diagnostic is carried out.
Continue - Verification, continued
------------------------
Verification, continued
- Volvo Scan Tool (ST) connect to VIDA station.
- Let engine idle.
- Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).
Does the diagnostic trouble code (DTC) recur?
Yes - VERIFICATION FAILED
No - VERIFIED
------------------------
VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
-------------------------------------------------
Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
------------------------
Attempt New Test - Checking pulsed secondary air injection system (PAIR) pump
-------------------------------------------------