Heater booster (HB) diagnosis previous knowledge · ad8370s2002a · Mercedes-Benz WIS

AD83.70-S-2002A

Heater booster (HB) diagnosis previous knowledge

18.8.98

MODEL 638 with ENGINE 611.980
with CODE (MQ3) Engine OM611 DE22 A (60 kW)
with CODE (MQ4) Engine OM611 DE22 LA (75 kW)
with CODE (MQ5) Engine OM611 DE22 LA (90 kW)

MODEL 638 with ENGINE 611.980 with CODE (HZ5) Hot water auxiliary heater 10 kW with timer

 Danger!	Risk of explosion due to fuel vapors, risk of poisoning from combustion gases and risk of injury from burning during or after heater operation	Do not put stationary heater or engine with heater booster into operation in confined spaces or in the vicinity of tank installations. Allow heater unit to cool down after operation and wear protective gloves.	AS83.70-Z-0002-01A
	Location and assignment of connectors and sockets		GF00.19-S-1100A
	Location and assignment of ground points		GF00.19-S-2000A
	Location and assignment of cable connectors		GF00.19-S-3100A
	Heater booster (HB) function description contents index		GF83.70-S-0997A
	Electrical wiring diagrams		PE83.70-S-2001F
	Connection and use of test equipment		AD00.00-S-1000AZ
	Connect Hand-Held Tester, read out fault memory		AD00.00-S-2000-03A
		With a fault display, cables, fuses, connectors and connections must be checked for open-circuit, good contact and correct connection in accordance with the currently valid circuit diagram.
	Heater booster coupling assignment		AD83.70-S-2002-01A
	Heater booster diagnostic tools		AD83.70-S-2002-02A
	Heater booster resistance values		AD83.70-S-2002-03A
	Heater booster function notes		AD83.70-S-2002-04A

Referenced documents

ad0000s1000az Connection and use of testing equipment
ad0000s200003a Connecting Hand-Held Tester (HHT), reading fault memory
ad8370s200201a Heater booster unit connector assignment
ad8370s200202a Heater booster ZUH diagnosis tools
ad8370s200203a ZUH resistances
ad8370s200204a ZUH function notes
as8370z000201a Risk of explosion caused by fuel vapors igniting, risk of poisoning caused by inhaling combustible gases and risk of injury caused by burns during and after operation of heater unit
gf0019s1100a Arrangement and assignment of connectors and sockets
gf0019s2000a Arrangement and assignment of ground points
gf0019s3100a Arrangement and assignment of terminal blocks
gf8370s0997a Table of contents, function description of heater booster (ZUH)
pe8370s2001f Wiring diagram of auxiliary heater (ACH)