Check electrical subharness of pump module · ar4920g0013ch · Mercedes-Benz WIS

AR49.20-G-0013CH

Check electrical subharness of pump module

10.08.2018

Engine	457.9, 458.9, 541.9, 542.9, 941.9, 942.9 in model 000.001
	with BlueTec

Plug (2) and connector socket (3) of the pump module (1) with traces of corrosion

W14.40-1292-11

Connector socket (6) of the SCR catalytic converter control unit (9) with traces of corrosion

6	Connector socket
9	SCR catalytic converter control unit

G49.20-3224-11

Plug (8) of the SCR catalytic converter control unit (9) with traces of corrosion

7	Contact
8	Connector

G14.40-3210-11

	Check
1	Switch off ignition.
2	Disconnect plug (2) from the connector socket (3) on the pump module (1).
3	Disconnect plug (8) from the connector socket (6) on the SCR catalytic converter control unit (9).
4	Check connector socket (3) on the pump module (1) for traces of corrosion.	If connector socket (3) is corroded,
		
		replace pump module (1).
			AR49.20-G-2010CH
		 Do not connect plug (2) with the connector socket (3) yet.
5	Check connector socket (6) on the SCR catalytic converter control unit (9) for traces of corrosion.	If connector socket (6) is corroded,
		
		replace SCR catalytic converter control unit (9).
		 See information from body manufacturer. Do not connect plug (8) with the connector socket (6) yet.
6	Check plugs (2, 8) for traces of corrosion.	If a plug (2, 8) is corroded,
		
		replace wiring harness from pump module (1) to SCR catalytic converter control unit (9).
		 See information from body manufacturer.
7	Connect plug (2) with the connector socket (3) to the pump module (1).
8	Connect plug (8) with connector socket (3) to the SCR catalytic converter control unit (9).