Troubleshooting; Mts 6531 Error Led Lights After Power On; The Mts 6531 Fails To Power Up; Vehicle Led Is Flashing Red - Bosch MTS 6531 Operating Instruction

6.

Troubleshooting

This section is intended to help you get back
on track if the MTS 6531 appears to be
operating abnormally. If the error is not elimi-
nated by the indicated remedy, it is necessary to
contact Service.
6.1 MTS 6531 error LED
lights after power On
Recommendations
1. Power down the MTS 6531 and verify
that the same problem exists when you pow-
er up again.
2. Connect the MTS 6531 to a com-
puter using USB and perform the recovery
procedure.
6.2 The MTS 6531 fails to
power up
MTS 6531 should power up as soon as
external power is applied. If MTS 6531
does not turn on, first check the cable connec-
tions. Try supplying power to MTS 6531
from two different power sources – the vehicle
DLC and the USB connector.
Recommendations
¶
Check that the cables are securely attached
to the MTS 6531 and the connector
pins are clean.
$
While the diagnostic device is connected
to the vehicle DLC, try powering from the
USB connector.
$
While the diagnostic device is connected
to USB, try powering from the vehicle DLC.
Robert Bosch GmbH
Troubleshooting | MTS 6531 | 17
6.3

"Vehicle LED is flashing red

If the MTS 6531 does not detect 12 V
on Pin 16 of the diagnostic connection cab-
le, MTS 6531 will inform the user by
automatically turning on and flashing the Ve-
hicle LED red. This condition might be seen if
MTS 6531 is only powered by a 5-V USB
connection or if the diagnostic connection cable
has accidently been displaced from the vehicle
Data Link Connector and is powered from the
backup capacitor. When MTS 6531 de-
tects 12 V on Pin 16, the Vehicle LED will stop
flashing red.
Recommendations
1. Ensure that 12 V is applied to Pin 16 of the
diagnostic connection cable.
2. Ensure ground on J1962 pin 5 is good.
6.4 MTS 6531 speaker is
beeping
If MTS 6531 is performing diagnostic
services for the computer and does not detect
12 V on Pin 16 of the diagnostic connection
cable, MTS 6531 will inform the user
of the loss of power by beeping the spea-
ker. MTS 6531 will continue to beep
until the backup capacitor is drained. When
MTS 6531 detects 12 V on Pin 16, the
speaker will stop beeping.
Recommendations
¶
Ensure that 12 V is applied to Pin 16 of the
diagnostic connection cable during diagnostic
sessions.
2019-07-01
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1 689 989 445