Diagnosis Item
26: Diagnose when the M.U.T.-III cannot receive the data sent by smartphone link display audio.
caution |
When servicing a CAN bus line,
earth yourself by touching a metal object such as an unpainted water pipe. If you fail to do,
a component connected to the CAN bus line may be broken.
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FUNCTION
The diagnostic result demonstrates that "the M.U.T.-III cannot receive the sent data from
the smartphone link display audio" when the M.U.T.-III checks the periodically sent data from
each ECU and cannot receive the smartphone link display audio data only.
TROUBLE JUDGEMENT CONDITIONS
M.U.T.-III judges the trouble when the periodically sent data from smartphone link display
audio cannot be received.
PROBABLE CAUSES
- Damaged harness wires and connectors
- Power supply circuit malfunction of the smartphone link display audio
- Malfunction of the smartphone link display audio
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STEP 1. Connector check: gateway-ECU (for smartphone link
display audio) connector and smartphone link display audio connector
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caution |
The strand end of the twist wire should be within 10 cm from
the connector. For details refer to service precautions.
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When checking the connectors, ensure that its wiring harness side and its short pins are
not damaged.
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Q.
Is the check result normal?
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Go to Step 2.
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Repair the defective connector.
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STEP 2. Resistance measurement at gateway-ECU (for smartphone link
display audio) and smartphone link display audio connector.
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caution |
- A digital multimeter should
be used. For details refer to service precautions.
- The test wiring harness should be used. For details refer to service precautions.
- When measuring the resistance, disconnect the negative battery terminal. For details
refer to service precautions.
- Strictly observe the specified wiring harness repair procedure. For details refer
to service precautions.
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(1)Disconnect the gateway-ECU (for smartphone link display audio) connector and the
smartphone link display audio connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the "LOCK" (OFF) position.
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(3)Ensure that the negative battery terminal is disconnected.
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(4)Continuity between the gateway-ECU (for smartphone link display audio) connector
terminal No. 6 and smartphone link display audio connector terminal No.3. OK: Continuity (2 Ω
or less)
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(5)Continuity between the gateway-ECU (for smartphone link display audio) connector
terminal No. 5 and smartphone link display audio connector terminal No.13. OK: Continuity (2 Ω
or less)
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Q.
Is the check result normal?
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<All the resistances measure 2 Ω
or less>
Power supply
to the smartphone link display audio may be suspected (Refer to GROUP 54A -
Smartphone
Link Display Audio, Troubleshooting ).
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NO : <Either or all of the resistances measure more than 2 Ω>
Repair
the wiring harness between the gateway-ECU (for smartphone link display audio) connector and
the smartphone link display audio connector.
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