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‒ →
Check wiring between test box and 4 pin connector for open circuit according to current flow diagram.
Contact 1+socket 35
Contact 3+socket 12
Wire resistance: Max. 1.5 ω
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‒ Check wire between control unit connector and 4 pin connector contact 3 for short to wire contact 1 and to vehicle earth, according to current flow diagram.
Socket 12 + 35
Socket 01 + 35
Socket 35 + vehicle earth
Specification: ∞ω
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‒ Additionally check wires for short to battery positive.
Specification: ∞ω
If no fault in wire is detected:
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‒ Perform resistance measurement at coolant temperature sender (G62) contacts 1+3, resistance figures => Page 24-32
, Fig. 1
If the specification is not obtained:
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‒ Renew coolant temperature sender (G62) => Page 24-12
, item 18
.
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