Test point 4

Terminal 86s signal

Ignition on Engine off PST2 display:

present

If not:

Test point 5

Terminal 58 signal

Ignition on

Terminal 58 switched off PST2 display: Off

Terminal 58 switched on PST2 display: On

If "Off' is displayed when terminal 58 is switched on: Switch off ignition

Pull off plug II on the instrument cluster Terminal 58 switched on

Measure the voltage between instrument cluster plug II pin 14 and

Test point 6

Ignition on

Clock button not actuated PST2 display:

Clock button pressed PST2 display:

Clock button turned to left PST2 display:

Clock button turned to right PST2 display:

not actuated actuated

-actuated

+actuated

If the tester displays no signal, the instrument cluster is faulty.

Test point 7

Brake pad

Ignition on

Engine off PST2 display: If not:

Check brake pads on all four brake discs for wear Switch off ignition

Pull off plug I on the instrument cluster

Pull off plug III on the instrument cluster

Ohmmeter on instrument cluster plug III pin 13 and ground Ohmmeter display: °o Q

Ohmmeter on instrument cluster plug I pin 23 and plug III pin 13 Ohmmeter display: < 5 Q

Test point 8

Brake fluid level

Ignition on Engine off PST2 display:

If not:

Check brake fluid level in brake fluid reservoir

Switch off ignition

Pull off plug II on the instrument cluster Pull off plug on brake fluid reservoir

Ohmmeter on instrument cluster plug II pin 4 and plug on brake

Ohmmeter on brake fluid reservoir plug pin 2 and ground

Ohmmeter on instrument cluster plug II pin 4 and ground, level switch not actuated

Ohmmeter display:

Ohmmeter on instrument cluster plug II pin 4 and ground, level

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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