Signal Too High. Permanent Fault

Checking The Signal Cable
- Ignition OFF.
- Disconnect pulsed secondary air injection system (PAIR) pump relay A from relay base.
- Ignition ON.
- Connect an electrician's screwdriver (3 W bulb at least) between relay base terminal 4 and ground.
- The bulb should not light.

If reading is OK:
^ Try a new pulsed secondary air injection system pump relay.
^ Proceed to: Verification section below.

If reading is incorrect:
^ Check signal cable between pulsed secondary air injection system pump relay terminal 4 and engine control module (ECM) # B38 for a short-circuit to supply voltage.
^ Proceed to: Verification section below.





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

- Reconnect connectors and reinstall components.
- Ignition ON.
- Activate pulsed secondary air injection system pump.
- A "clicking sound" should be heard from the relay and the pulsed secondary air injection system pump should start.

If reading is OK:
^ Fault corrected.

If reading is incorrect:
^ Proceed to: Fault-tracing Information section below.

Fault-tracing Information
The verification result shows that the fault persists.

- Do you want to exit fault-tracing?

Yes:
^ Fault not corrected.

No:
^ Proceed to: Checking The Signal Cable section above.