Signal Too High. Permanent Fault

Signal too high. Permanent fault

EFI-445 Pulsed secondary air injection system (PAIR) pump, signal.

Checking the signal cable








- Ignition off.
- Remove signal cable from pulsed secondary air injection system (PAIR) pump relay connector B.
- Ignition on.
Connect an electrician's screwdriver (3 W bulb at least) between pulsed secondary air injection system (PAIR) pump relay connector terminal B1 and ground.









The bulb should not light.

OK - Try a new pulsed secondary air injection system (PAIR) pump relay. Then continue with Verification.
Replacing component

Not OK - Check signal cable between the pulsed secondary air injection system (PAIR) pump connector B1 and engine control module (ECM) #B38 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for a short-circuit

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Replacing component
- Try a new pulsed secondary air injection system (PAIR) pump relay.

Continue - Verification

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Checking for a short-circuit








- Check signal cable between pulsed secondary air injection system (PAIR) pump relay connector B1 and engine control module (ECM) #B38 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied as follows:








- Ignition on.
- Select Volvo Scan Tool (ST) to activate pulsed secondary air injection system (PAIR) pump.





A "clicking sound" should be heard from the relay and the pulsed secondary air injection system (PAIR) pump should start.

OK - VERIFIED

Not OK - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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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

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Attempt New Test - Checking the signal cable

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