ECM test of electrical system secondary air injection malfunction (function chain)

AD07.53-P-6000-22A

ECM test of electrical system secondary air injection malfunction (function chain)





Scope of test

Tester/test connection

Operation/

Requirement

Specified value

 Possible cause/

Remedy

1.0



Secondary air injection

(Causal chain)

Low emission engine, EURO 3/4 and vehicles with air pumps

24 
(2.24)

40 

(1.40)

N3/5



N3/5



23
(2.23)

60

(1.60)

Note: Measurement looks at

the O2 sensor signal upstream of

TWC

With coolant temperature at
>80 °C allow engine to run in neutral for approx. 2 minutes

Insert jumper at socket box

Voltage for O2 sensor oscillates between

- 0.2 V up to +1.0 V

Air pump running

Voltage changes to <100 mV within

20 S

Secondary air injection switchover valve (Y32)

Secondary air injection relay (K17)

 No passage through air lines

 No output from air pump