DTC DETECTION LOGIC
| DTC No. |
CONSULT screen terms (Trouble diagnosis content) | DTC detection condition | ||
|---|---|---|---|---|
| B1315–13 |
AM/FM 1 antenna (Radio antenna) |
[OPEN] | Diagnosis condition | When ignition switch is ON. |
| Signal (terminal) | ANT +B circuit between audio unit and antenna base (terminal 67) | |||
| Threshold | – | |||
| Diagnosis delay time | 30 seconds or more | |||
| B1315–11 | [GND–SHORT] | Diagnosis condition | When ignition switch is ON. | |
| Signal (terminal) | ANT +B circuit between audio unit and antenna base (terminal 67) | |||
| Threshold | – | |||
| Diagnosis delay time | 30 seconds or more | |||
POSSIBLE CAUSE
Radio antenna is not connected
Harness or connector (ANT +B circuit is open or short to ground)
FAIL-SAFE
No AM/FM radio reception
PERFORM DTC CONFIRMATION PROCEDURE
CONSULT
Ignition switch ON.
Ignition switch OFF and wait at least 30 seconds.
Ignition switch ON and wait at least 30 seconds or more.
Select “Self Diagnostic Result” mode of “MULTI AV”.
Check DTC.
Is DTC B1315 detected?
YES>>Proceed to DTC Diagnosis Procedure.
NO>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO>>Confirmation after repair: Inspection End.
CHECK ANTENNA CONNECTOR
Ignition switch OFF.
Visually inspect radio antenna, antenna feeder and antenna connector.
Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair or replace malfunctioning parts.
CHECK ANTENNA CIRCUIT CONTINUITY
Ignition switch OFF.
Disconnect audio unit connector and antenna base connector.
Check continuity between audio unit connector and antenna base connector.
| Audio unit | Antenna base | Continuity | ||
|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | |
| M124 | 67 | R203 | 3 | Yes |
Check continuity between audio unit connector and ground.
| Audio unit | Ground | Continuity | |
|---|---|---|---|
| Connector | Terminal | ||
| M124 | 67 | — | No |
Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair or replace malfunctioning parts.
CHECK AUDIO UNIT VOLTAGE
Connect audio unit connector and antenna base connector.
Ignition switch ON.
Check the voltage between audio unit and ground.
| Audio unit | Ground |
Voltage (Approx.) | |
|---|---|---|---|
| Connector | Terminal | ||
| M124 | 67 | — | Battery voltage |
Is the inspection result normal?
YES>>Replace antenna. Refer to Removal and Installation.
NO>>Replace audio unit. Refer to Removal and Installation.
B130b Rear Right Speaker
B1321 Front Right Tweeter