2021 Mazda CX-3 AWDFACTORY OEM SERVICE PROCEDURE

Connectivity Master Unit DTCS

DTC DESCRIPTION (CONNECTIVITY MASTER UNIT)

DTC No. Refer to
B1087:87 (See DTC B1087:87 [CONNECTIVITY MASTER UNIT] .)
B108E:04 (See DTC B108E:04 [CONNECTIVITY MASTER UNIT] .)
B108E:06 (See DTC B108E:06 [CONNECTIVITY MASTER UNIT] .)
B108E:1C (See DTC B108E:1C [CONNECTIVITY MASTER UNIT] .)
B108E:87 (See DTC B108E:87 [CONNECTIVITY MASTER UNIT] .)
B116A:11 (See DTC B116A:11 [CONNECTIVITY MASTER UNIT] .)
B116A:12 (See DTC B116A:12 [CONNECTIVITY MASTER UNIT] .)
B116A:92 (See DTC B116A:92 [CONNECTIVITY MASTER UNIT] .)
B119F:11 (See DTC B119F:11 [CONNECTIVITY MASTER UNIT] .)
B119F:13 (See DTC B119F:13 [CONNECTIVITY MASTER UNIT] .)
B119F:1D (See DTC B119F:1D [CONNECTIVITY MASTER UNIT] .)
B119F:92 (See DTC B119F:92 [CONNECTIVITY MASTER UNIT] .)
B11BA:11 (See DTC B11BA:11 [CONNECTIVITY MASTER UNIT] .)
B11BA:15 (See DTC B11BA:15 [CONNECTIVITY MASTER UNIT] .)
B1201:11 (See DTC B1201:11 [CONNECTIVITY MASTER UNIT] .)
B1201:15 (See DTC B1201:15 [CONNECTIVITY MASTER UNIT] .)
B1238:01 (See DTC B1238:01 [CONNECTIVITY MASTER UNIT] .)
B1238:16 (See DTC B1238:16 [CONNECTIVITY MASTER UNIT] .)
B1238:87 (See DTC B1238:87 [CONNECTIVITY MASTER UNIT] .)
B1252:09 (See DTC B1252:09 [CONNECTIVITY MASTER UNIT] .)
B1252:1D (See DTC B1252:1D [CONNECTIVITY MASTER UNIT] .)
B1252:87 (See DTC B1252:87 [CONNECTIVITY MASTER UNIT] .)
B12B8:1D / (See DTC B12B8:1D [CONNECTIVITY MASTER UNIT] .)
B12B8:87/ (See DTC B12B8:87 [CONNECTIVITY MASTER UNIT] .)
B12BD:11 (See DTC B12BD:11 [CONNECTIVITY MASTER UNIT] .)
B12BD:87 (See DTC B12BD:87 [CONNECTIVITY MASTER UNIT] .)
B1A89:13 (See DTC B1A89:13 [CONNECTIVITY MASTER UNIT] .)
B1A89:42 (See DTC B1A89:42 [CONNECTIVITY MASTER UNIT] .)
B1D19:64 (See DTC B1D19:64 [CONNECTIVITY MASTER UNIT] .)
B1D19:79 (See DTC B1D19:79 [CONNECTIVITY MASTER UNIT] .)
B1D19:98 (See DTC B1D19:98 [CONNECTIVITY MASTER UNIT] .)
U0001:88 (See DTC U0001:88/U0100:00/U0101:00/U0104:00/U0121:00/U0131:00/U0140:00/U0151:00/U0155:00/U0182:00/U0214:00/U0235:00/U023A:00 [CONNECTIVITY MASTER UNIT] .)
U0028:88 (See DTC U0028:88 [CONNECTIVITY MASTER UNIT] .)
U0100:00 (See DTC U0001:88/U0100:00/U0101:00/U0104:00/U0121:00/U0131:00/U0140:00/U0151:00/U0155:00/U0182:00/U0214:00/U0235:00/U023A:00 [CONNECTIVITY MASTER UNIT] .)
U0101:00
U0104:00
U0121:00
U0131:00
U0140:00
U0151:00
U0155:00
U0182:00
U0184:00 (See DTC U0184:00/U0187:00 [CONNECTIVITY MASTER UNIT] .)
U0187:00
U0214:00 (See DTC U0001:88/U0100:00/U0101:00/U0104:00/U0121:00/U0131:00/U0140:00/U0151:00/U0155:00/U0182:00/U0214:00/U0235:00/U023A:00 [CONNECTIVITY MASTER UNIT] .)
U0235:00
U023A:00
U2300:54 (See DTC U2300:54 [CONNECTIVITY MASTER UNIT] .)
U2300:55 (See DTC U2300:55 [CONNECTIVITY MASTER UNIT] .)
U3000:42 (See DTC U3000:42 [CONNECTIVITY MASTER UNIT] .)
U3003:16 (See DTC U3003:16 [CONNECTIVITY MASTER UNIT] .)
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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