Purge valve — pinpoint tests (Triumph Rocket III)

Fault Code	Possible cause	Action
P0444	Open circuit or short circuit to earth	View & note diagnostic tool "sensor" data. Ensure purge valve connector is secure. Disconnect ECM and proceed to pinpoint test 1
P0445	Short circuit to battery+	Disconnect purge valve and proceed to pinpoint test 5

Pinpoint tests

Test	Result	Action
1 Check cable and terminal integrity: - ECM pin B31	OK	Proceed to test 2
1 Check cable and terminal integrity: - ECM pin B31	Faulty	Rectify fault, proceed to test 7
2 Check resistance value: - ECM pin A20 to ECM pin B31	24Ω to 28Ω	Disconnect purge valve and proceed to test 3
2 Check resistance value: - ECM pin A20 to ECM pin B31	Open circuit	Proceed to test 4
Short circuit	Disconnect purge valve and proceed to test 5
3 Check cable for short circuit: - ECM pin B31 to earth	OK	Proceed to test 7
3 Check cable for short circuit: - ECM pin B31 to earth	Short circuit	Locate and rectify wiring fault, proceed to test 7
4 Check cable continuity: - ECM pin B31 to valve pin 2 - ECM pin A20 to valve pin 1	OK	Proceed to test 6
	Open circuit	Locate and rectify wiring fault, proceed to test 7
5 Check cable for short circuit: - ECM pin A20 to ECM pin B31	OK	Proceed to test 6
	Short circuit	Locate and rectify wiring fault, proceed to test 7
6 Check purge valve resistance: - Valve pin 1 to valve pin 2	24Ω to 28Ω	Proceed to test 7
	Faulty	Renew purge valve, proceed to test 7
7 Reconnect harness, clear fault code and run diagnostic tool function test to visually verify operation of purge valve	OK	Action complete - quit test
	Fault	Contact Triumph service

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This article has been reviewed: Serafim Sazonov

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