P0412

Secondary air injection short circuit to ground or open circuit

View and note diagnostic tool sensor data.

Ensure SAI valve connector is secure.

Disconnect engine ECM and proceed to pinpoint test 1:

P044F

Secondary air injection short circuit to battery positive

Disconnect engine ECM and SAI valve and proceed to pinpoint test 5:

1

Check cable and terminal integrity:

- Engine ECM pin B02

- EMS Relay pin 5

OK

Proceed to test 2

Faulty

Rectify fault, proceed to test 7

2

Check resistance value:

- Engine ECM pin A08 to Engine ECM pin B02

- Engine ECM pin A21 to Engine ECM pin B02

18 Ohms to 24 Ohms

Proceed to test 3

Open circuit

Disconnect SAI valve and proceed to test 4

Short circuit

Disconnect SAI valve and proceed to test 5

3

Check cable for short circuit:

- Engine ECM pin B02 to ground

OK

Proceed to test 7

Short circuit

Locate and rectify wiring fault, proceed to test 7

4

Check cable continuity:

- EMS relay pin 5 to SAI valve pin 2

- Engine ECM pin B02 to SAI valve pin 1

OK

Proceed to test 6

Short circuit

Locate and rectify wiring fault, proceed to test 7

5

Check cable for short circuit:

- Engine ECM pin A08 to Engine ECM pin B02

- Engine ECM pin A21 to Engine ECM pin B02

OK

Proceed to test 6

Fault still present

Locate and rectify wiring fault, proceed to test 7

6

Check SAI valve resistance:

- SAI valve pin 1 to SAI valve pin 2

18 Ohms to 24 Ohms

Proceed to test 7

Faulty

Renew SAI valve, proceed to test 7

7

Reconnect harness, clear fault code and run diagnostic tool function test to visually verify operation of SAI valve.

OK

Action complete - quit test

Fault still present

Contact Triumph service