Fault code 9131: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING CHART - FAULT CODE 9131

Work instruction			Display OK	If not OK
1	Visual inspection	Check B+ connection to generator for fastening and corrosion	Step 2	Clean or fasten the connection -> End
2	Check battery		Step 3	Replace battery -> End
3	Check B+ wire from generator to positive terminal of the battery for open circuit	Loosen B+ wire to generator Measure resistance to B+ wire and positive terminal of the battery	< 5 Step 4	Step 5
4	Check wiring (pin 30 and pin 15) for contact resistance	Switch off ignition Pull off plug A on instrument cluster Switch on ignition Measure voltage between plug A pin 2 and ground Measure voltage between plug A pin 18 and ground Measure voltage between plug A pin 3 and ground Measure voltage as a comparative value at both battery terminals	Battery voltage Step 5	Repair wiring harness -> End
5	Repair B+ wire		-> End