Maintenance ST700 Dash Display System
64
Display and dial show fixed high values
❑ Driver button (peaks) faulty
Renew the Driver button.
Disconnect the Driver button. If values return to normal, renew the
button.
❑ Faulty switch wiring
Check the switch wiring.
Check wiring for a short between pin 8 and pin 2 (B–) of the 8–way
connector.
Driver button: ‘Show Peak Values’ function does not work.
‘Change display layer’ function does not work.
❑ Driver button faulty
Renew the Driver button
Disconnect the Driver button and short pins 1 and 4 together on the
connector ‘S1’ to the tacho. If the display changes, renew the Driver
button. Otherwise, check the wiring.
❑ Faulty switch wiring
Check the switch wiring for correct continuity
Pin 8 of the 8–way connector to pin 1 of the S1 connector should be
approximately 6k8 ohms. Pin 1 of connector S1 to B– (chassis) should
be greater than 1M ohms.
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