Inspection Procedure
7: The Compass does not Indicate Normally.
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COMMENTS ON TROUBLE SYMPTOM
The compass sensor is abnormal, or it
is seemed that the indication is affected by some
nearby magnetized matter.
PROBABLE CAUSES
- Malfunction of the compass sensor
- Malfunction of the centre display unit
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STEP 1.Check of own vehicle position.
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Q.
Is the geomagnetism stable at the place?
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Go to Step 3.
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Go to Step 2.
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STEP 2. Move the vehicle to the geomagnetically stable location to
re-check the geomagnetism.
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Q.
Is there any abnormality at the geomagnetism sensor mode?
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Go to Step 3.
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There
is no action to be taken.
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STEP 3. Check of compass sensor for magnetisation.
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Q.
Does the indication return to normal when the carrier antenna that is
mounted on the
body by a magnet, a magnet or metal existing nearby the compass sensor is
removed?
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There
is no action to be taken.
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Go to step 4.
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STEP 4. Connector check: G-01 compass sensor connector
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Q.
Is the check result normal?
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Go to Step 5.
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Repair
the connector concerned.
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STEP 5. Voltage measurement at G-01 compass sensor
connector.
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(1)Disconnect the connector, and measure at the wiring
harness-side connector.
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(2)Turn the ignition switch to the ACC position.
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(3)Voltage between G-01 compass sensor connector terminal
No.5 and the body earth OK: Battery voltage
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Q.
Is the check result normal?
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Go to Step 7.
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Go to Step 6.
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STEP 6. Check the harness wire between G-01 compass sensor connector
terminal No.5 and ignition swtich (ACC).
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note |
Prior to the wiring harness inspection, check
intermediate connectors D-220 <LH drive
vehicles>, D-221, D-238, D-241 and E-106, and repair if
necessary.
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- Check the power supply lines (ACC power supply) for open
circuit.
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Q.
Is the check result normal?
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If no
malfunctions are not found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00 - How to Use
Troubleshooting/Inspection Service
Points - How to Cope with Intermittent Malfunction .
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Repair
the wiring harness.
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STEP 7. Connector check: D-106 centre display unit
connector
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Q.
Is the check result normal?
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Go to Step 8.
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Repair
the connector concerned.
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STEP 8. Check the harness wire between D-106 centre display unit
connector
terminal No.1, 2, 3 and G-01 compass sensor connector terminal No.8, 16,
15
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- Check the communication lines for open circuit.
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note |
Prior to the wiring harness inspection, check
intermediate connectors D-221 and E-106,
and repair if necessary.
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Q.
Is the check result normal?
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Go to Step 9.
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Repair
the wiring harness.
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STEP 9. Substitute a known good compass sensor, and check the trouble
symptom.
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Check whether the compass does indicate
normally.
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Q.
Is the check result normal?
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Replace the compass sensor.
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Replace the centre display
unit.
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