Signal Too High. Permanent Fault

Checking the signal cable
- Ignition off.
- Disconnect the pulsed secondary air injection system (PAIR) pump relay from the 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:
^ Proceed to next step below.

If reading is incorrect:
^ Proceed to Checking for a short-circuit section below.




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

Then continue with:
^ Proceed to Verification in Signal Too Low. Permanent Fault




Checking for a short-circuit
Check signal cable between pulsed secondary air injection system (PAIR) pump relay terminal 4 and engine control module (ECM) #B38 for a short-circuit to supply voltage according to See other manual: Checking wiring and connections.

Then continue with:
^ Proceed to Verification in Signal Too Low. Permanent Fault