DTC U2142:00 [MAZDA ERA-GLONASS CONTROL MODULE]


id0902r6542200


Outline

System malfunction location

Communication error with emergency call microphone

Detection condition
•  The Mazda ERA-GLONASS control module detects any of the following conditions.
―  The Mazda ERA-GLONASS control module could not receive any signal from the emergency call microphone, Mazda ERA-GLONASS speaker.
―  The Mazda ERA-GLONASS control module received error signal for a continuous 2 times from the emergency call microphone.
Fail-safe
Not applicable
Possible cause
•  Mazda ERA-GLONASS speaker connector or terminal malfunction
•  Mazda ERA-GLONASS speaker malfunction
•  Emergency call microphone connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
―  Emergency call microphone terminal A and Mazda ERA-GLONASS speaker terminal B
―  Emergency call microphone terminal C and Mazda ERA-GLONASS speaker terminal A
•  Open circuit in wiring harness between the following terminals:
―  Emergency call microphone terminal A and Mazda ERA-GLONASS speaker terminal B
―  Emergency call microphone terminal C and Mazda ERA-GLONASS speaker terminal A
•  Short to power supply in wiring harness between the following terminals:
―  Emergency call microphone terminal A and Mazda ERA-GLONASS speaker terminal B
―  Emergency call microphone terminal C and Mazda ERA-GLONASS speaker terminal A
•  Mazda ERA-GLONASS control module connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
―  Mazda ERA-GLONASS control module terminal 1N and emergency call microphone terminal I
―  Mazda ERA-GLONASS control module terminal 1L and emergency call microphone terminal K
―  Mazda ERA-GLONASS control module terminal 1Y and emergency call microphone terminal D
―  Mazda ERA-GLONASS control module terminal 1G and emergency call microphone terminal H
―  Mazda ERA-GLONASS control module terminal 1I and emergency call microphone terminal J
―  Mazda ERA-GLONASS control module terminal 1E and emergency call microphone terminal B
―  Mazda ERA-GLONASS control module terminal 1J and emergency call microphone terminal L
•  Open circuit in wiring harness between the following terminals:
―  Mazda ERA-GLONASS control module terminal 1N and emergency call microphone terminal I
―  Mazda ERA-GLONASS control module terminal 1L and emergency call microphone terminal K
―  Mazda ERA-GLONASS control module terminal 1Y and emergency call microphone terminal D
―  Mazda ERA-GLONASS control module terminal 1G and emergency call microphone terminal H
―  Mazda ERA-GLONASS control module terminal 1I and emergency call microphone terminal J
―  Mazda ERA-GLONASS control module terminal 1E and emergency call microphone terminal B
―  Mazda ERA-GLONASS control module terminal 1J and emergency call microphone terminal L
•  Short to power supply in wiring harness between the following terminals:
―  Mazda ERA-GLONASS control module terminal 1N and emergency call microphone terminal I
―  Mazda ERA-GLONASS control module terminal 1L and emergency call microphone terminal K
―  Mazda ERA-GLONASS control module terminal 1Y and emergency call microphone terminal D
―  Mazda ERA-GLONASS control module terminal 1G and emergency call microphone terminal H
―  Mazda ERA-GLONASS control module terminal 1I and emergency call microphone terminal J
―  Mazda ERA-GLONASS control module terminal 1E and emergency call microphone terminal B
―  Mazda ERA-GLONASS control module terminal 1J and emergency call microphone terminal L
•  Emergency call microphone malfunction
•  Mazda ERA-GLONASS control module malfunction


Diagnostic Procedure

Step

Inspection

Results

Action

1
INSPECT MAZDA ERA-GLONASS SPEAKER CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the Mazda ERA-GLONASS speaker connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 12.
2
INSPECT MAZDA ERA-GLONASS SPEAKER
•  Inspect the Mazda ERA-GLONASS speaker.
•  Is the Mazda ERA-GLONASS speaker normal?
Yes
Go to the next step.
No
Replace the Mazda ERA-GLONASS speaker, then go to Step 12.
3
INSPECT EMERGENCY CALL MICROPHONE CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the emergency call microphone connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 12.
4
INSPECT MAZDA ERA-GLONASS SPEAKER CIRCUIT FOR SHORT TO GROUND
•  Verify that the Mazda ERA-GLONASS speaker and Mazda ERA-GLONASS control module connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground.
―  Emergency call microphone terminal A
―  Emergency call microphone terminal C
•  Is there continuity?
Yes
See wiring diagram and verify if there is a common connector between the following terminals:
•  Emergency call microphone terminal A and Mazda ERA-GLONASS speaker terminal B
•  Emergency call microphone terminal C and Mazda ERA-GLONASS speaker terminal A
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which is shorted to ground.
Go to Step 12.
No
Go to the next step.
5
INSPECT MAZDA ERA-GLONASS SPEAKER CIRCUIT FOR OPEN CIRCUIT
•  Verify that the Mazda ERA-GLONASS speaker and Mazda ERA-GLONASS control module connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  Emergency call microphone terminal A
―  Emergency call microphone terminal C
•  Is there continuity?
Yes
Go to the next step.
No
See wiring diagram and verify if there is a common connector between the following terminals:
•  Emergency call microphone terminal A and Mazda ERA-GLONASS speaker terminal B
•  Emergency call microphone terminal C and Mazda ERA-GLONASS speaker terminal A
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 12.
6
INSPECT MAZDA ERA-GLONASS SPEAKER CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the Mazda ERA-GLONASS speaker and Mazda ERA-GLONASS control module connectors are disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on)
•  Measure the voltage at the following terminals (wiring harness-side):
―  Emergency call microphone terminal A
―  Emergency call microphone terminal C
•  Is the voltage 0 V?
Yes
Go to the next step.
No
See wiring diagram and verify if there is a common connector between the following terminals:
•  Emergency call microphone terminal A and Mazda ERA-GLONASS speaker terminal B
•  Emergency call microphone terminal C and Mazda ERA-GLONASS speaker terminal A
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which is shorted to power supply.
Go to Step 12.
7
INSPECT MAZDA ERA-GLONASS CONTROL MODULE CONNECTOR CONDITION
•  Disconnect the Mazda ERA-GLONASS control module connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 12.
8
INSPECT EMERGENCY CALL MICROPHONE CIRCUIT FOR SHORT TO GROUND
•  Verify that the Mazda ERA-GLONASS speaker and Mazda ERA-GLONASS control module connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground.
―  Mazda ERA-GLONASS control module terminal 1N
―  Mazda ERA-GLONASS control module terminal 1L
―  Mazda ERA-GLONASS control module terminal 1Y
―  Mazda ERA-GLONASS control module terminal 1G
―  Mazda ERA-GLONASS control module terminal 1I
―  Mazda ERA-GLONASS control module terminal 1E
―  Mazda ERA-GLONASS control module terminal 1J
•  Is there continuity?
Yes
See wiring diagram and verify if there is a common connector between the following terminals:
•  Mazda ERA-GLONASS control module terminal 1N and emergency call microphone terminal I
•  Mazda ERA-GLONASS control module terminal 1L and emergency call microphone terminal K
•  Mazda ERA-GLONASS control module terminal 1Y and emergency call microphone terminal D
•  Mazda ERA-GLONASS control module terminal 1G and emergency call microphone terminal H
•  Mazda ERA-GLONASS control module terminal 1I and emergency call microphone terminal J
•  Mazda ERA-GLONASS control module terminal 1E and emergency call microphone terminal B
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which is shorted to ground.
Go to Step 12.
No
Go to the next step.
9
INSPECT EMERGENCY CALL MICROPHONE CIRCUIT FOR OPEN CIRCUIT
•  Verify that the Mazda ERA-GLONASS speaker and Mazda ERA-GLONASS control module connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  Mazda ERA-GLONASS control module terminal 1N
―  Mazda ERA-GLONASS control module terminal 1L
―  Mazda ERA-GLONASS control module terminal 1Y
―  Mazda ERA-GLONASS control module terminal 1G
―  Mazda ERA-GLONASS control module terminal 1I
―  Mazda ERA-GLONASS control module terminal 1E
―  Mazda ERA-GLONASS control module terminal 1J
•  Is there continuity?
Yes
Go to the next step.
No
See wiring diagram and verify if there is a common connector between the following terminals:
•  Mazda ERA-GLONASS control module terminal 1N and emergency call microphone terminal I
•  Mazda ERA-GLONASS control module terminal 1L and emergency call microphone terminal K
•  Mazda ERA-GLONASS control module terminal 1Y and emergency call microphone terminal D
•  Mazda ERA-GLONASS control module terminal 1G and emergency call microphone terminal H
•  Mazda ERA-GLONASS control module terminal 1I and emergency call microphone terminal J
•  Mazda ERA-GLONASS control module terminal 1E and emergency call microphone terminal B
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 12.
10
INSPECT EMERGENCY CALL MICROPHONE CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the Mazda ERA-GLONASS speaker and Mazda ERA-GLONASS control module connectors are disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on)
•  Measure the voltage at the following terminals (wiring harness-side):
―  Mazda ERA-GLONASS control module terminal 1N
―  Mazda ERA-GLONASS control module terminal 1L
―  Mazda ERA-GLONASS control module terminal 1Y
―  Mazda ERA-GLONASS control module terminal 1G
―  Mazda ERA-GLONASS control module terminal 1I
―  Mazda ERA-GLONASS control module terminal 1E
―  Mazda ERA-GLONASS control module terminal 1J
•  Is the voltage 0 V?
Yes
Go to the next step.
No
See wiring diagram and verify if there is a common connector between the following terminals:
•  Mazda ERA-GLONASS control module terminal 1N and emergency call microphone terminal I
•  Mazda ERA-GLONASS control module terminal 1L and emergency call microphone terminal K
•  Mazda ERA-GLONASS control module terminal 1Y and emergency call microphone terminal D
•  Mazda ERA-GLONASS control module terminal 1G and emergency call microphone terminal H
•  Mazda ERA-GLONASS control module terminal 1I and emergency call microphone terminal J
•  Mazda ERA-GLONASS control module terminal 1E and emergency call microphone terminal B
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which is shorted to power supply.
Go to Step 12.
11
PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING LOCATION IS EMERGENCY CALL MICROPHONE
•  Always reconnect all disconnected connectors.
•  Reconnect the negative battery terminal.
•  Clear the DTC for the Mazda ERA-GLONASS control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 25 s or more.
•  Perform the DTC inspection for the Mazda ERA-GLONASS control module using the M-MDS.
•  Is the same DTC displayed?
Yes
Replace the emergency call microphone, then go to the next step.
No
Go to Step 13.
12
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Reconnect the negative battery terminal.
•  Clear the DTC for the Mazda ERA-GLONASS control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 25 s or more.
•  Perform the DTC inspection for the Mazda ERA-GLONASS control module using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the Mazda ERA-GLONASS control module.
Go to the next step.
No
Go to the next step.
13
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.