
Diagnostic procedure

Dtc b2777, b2778, b2779, b2780
TroubleshootingMazda 6 Service Manual: Front door glass removal/installation
1. Operate the front door glass so that the distance from the top of the
front door glass to the upper part of the rear beltline molding is 210 mm
{8.3 in}.
2. Disconnect the negative battery cable.
3. Remove the front door trim.
4. Remove the hole cover.
5. Remove the screws.
6. Insert ...
Mazda 6 Service Manual: Woofer inspection
1. Inspect for continuity between the audio amplifier connector terminals and
woofer connector terminals using an ohmmeter.
If not as specified, replace the related wiring harnesses.
2. Verify that there is battery positive voltage at the woofer connector
terminal A (4SD) or C (5HB) u ...