Lifting the plot of the comic from the Wiki:
Jazz appeared in issue #6 of the Titan Transformers magazine. Clocker and Jazz were being pursued by Bonecrusher, with Jazz half-dead due to not protecting his Spark Core properly - he would've been fully dead if Clocker hadn't saved him. Clocker ordered him to flee while he fought the enemy - the condition Jazz was in, "you're more hindrance than help to me". Clocker's shots barely affected Bonecrusher and by the time reinforcements arrived, he had been killed.
I like that the comics used some of the toys from the toyline as additional characters. I hope the UK movie comics get reprinted in the US, they cost about $15 in issue to import them!