Fault code 9121: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING FAULT CODE 9121

Work instruction			Display OK	If not OK
1	Perform a drive-link test	Select the menu item "pointer" in the drive links menu item Perform the drive-link test with the key F8 and observe the movement of the oil pressure indicator	The oil pressure indicator is controlled to the top value and then to value 0 Step 2	Step 7
2	Check output voltage of the instrument cluster	Disconnect wire to pin G of the sensor for the oil pressure indicator Switch on ignition Measure voltage between pin G and ground	approx. 5 V Step 6	Step 3
3	Check wire between instrument cluster and sensor for oil pressure indicator for short to ground	Switch off ignition Disconnect plug B from the instrument cluster Measure resistance between plug B on instrument cluster pin 5 and ground	Step 4	Repair wiring harness ->End
4	Check wire between instrument cluster and sensor for oil pressure indicator for short to B+	Switch on ignition Measure voltage between plug B on instrument cluster pin 5 and ground	0 V Step 5	Repair wiring harness ->End
5	Check wire between instrument cluster and sensor for oil level indicator for open circuit	Switch off ignition Measure resistance between plug B on the instrument cluster pin 5 and plug on the sensor of oil pressure indicator, pin G	< 5 Step 7	Repair wiring harness ->End
6	Replace oil pressure sensor		->End
7	Replace instrument cluster		->End