Home

Mazdamanuals.com

DTC B1A30:2B [CONNECTIVITY MASTER UNIT]

id1602a1006300

Outline

System malfunction location

Commander switch is stuck on

Detection condition

•  The connectivity master unit (CMU) detects that any of the commander switches is on for a continuous 3 min or more.

Fail-safe

•  Disables the operation using the button which detected the stuck on condition.

Possible cause

•  Intentionally pressing and holding commander switch

•  Commander switch malfunction

•  Commander switch circuit malfunction

•  Connectivity master unit (CMU) malfunction

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Commander switch is stuck on
Detection condition	• The connectivity master unit (CMU) detects that any of the commander switches is on for a continuous 3 min or more.
Fail-safe	• Disables the operation using the button which detected the stuck on condition.
Possible cause	• Intentionally pressing and holding commander switch • Commander switch malfunction • Commander switch circuit malfunction • Connectivity master unit (CMU) malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY COMMANDER SWITCH CONDITION

•  Visually inspect each switch of the commander switch.

•  Are there any switches in the commander switch that are stuck in a pressed condition?

Yes

Release the stuck switch.

•  If foreign matter is caught, remove it if possible.

•  The stuck switch and adjacent switch are operated any number of times.

If the stuck switch is released:

•  Go to the next step.

If the stuck switch is not released

•  Repair or replace the malfunctioning location and perform the repair completion verification.
(Refer to the [COMMANDER SWITCH REMOVAL/INSTALLATION] in the workshop manual)

No

Go to the next step.

2

VERIFY COMMANDER SWITCH MALFUNCTION

•  Switch the ignition ON (engine off).

•  Verify the commander switch operation using the [Touch Pad/Commander Inspection] using the diagnostic assist function.
(See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT (E)].)

•  Is the commander switch operating normally?

Yes

Go to the next step.

No

Perform the symptom troubleshooting procedure [OPERATION USING COMMANDER SWITCH NOT POSSIBLE] of the connectivity master unit (CMU).

(See OPERATION USING COMMANDER SWITCH NOT POSSIBLE.)

•  If the malfunction recurs, replace the commander switch and perform the repair completion verification.
(Refer to the [COMMANDER SWITCH REMOVAL/INSTALLATION] in the workshop manual)

Repair completion verification 1

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Clear the DTC recorded in the memory.
(Refer to the [CLEARING DTC] in the workshop manual)

•  Perform the DTC inspection for the connectivity master unit (CMU).
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW] in the workshop manual)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction recurs, replace the connectivity master unit (CMU), then go to the next step.
(Refer to the [CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION] in the workshop manual)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs ARE DISPLAYED

•  Perform the DTC inspection.
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Is a DTC displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	VERIFY COMMANDER SWITCH CONDITION • Visually inspect each switch of the commander switch. • Are there any switches in the commander switch that are stuck in a pressed condition?	Yes	Release the stuck switch. • If foreign matter is caught, remove it if possible. • The stuck switch and adjacent switch are operated any number of times. If the stuck switch is released: • Go to the next step. If the stuck switch is not released • Repair or replace the malfunctioning location and perform the repair completion verification. (Refer to the [COMMANDER SWITCH REMOVAL/INSTALLATION] in the workshop manual)
1		No	Go to the next step.
2	VERIFY COMMANDER SWITCH MALFUNCTION • Switch the ignition ON (engine off). • Verify the commander switch operation using the [Touch Pad/Commander Inspection] using the diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT (E)].) • Is the commander switch operating normally?	Yes	Go to the next step.
2		No	Perform the symptom troubleshooting procedure [OPERATION USING COMMANDER SWITCH NOT POSSIBLE] of the connectivity master unit (CMU). (See OPERATION USING COMMANDER SWITCH NOT POSSIBLE.) • If the malfunction recurs, replace the commander switch and perform the repair completion verification. (Refer to the [COMMANDER SWITCH REMOVAL/INSTALLATION] in the workshop manual)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (Refer to the [CLEARING DTC] in the workshop manual) • Perform the DTC inspection for the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the workshop manual) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW] in the workshop manual) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the connectivity master unit (CMU), then go to the next step. (Refer to the [CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION] in the workshop manual)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs ARE DISPLAYED • Perform the DTC inspection. (Refer to the [DTC INSPECTION] in the workshop manual) • Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.