Code No.B210D:
Power Supply Low Battery
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When replacing the ECU, always
check that the communication circuit is normal.
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DIAGNOSTIC FUNCTION
If the e-Call control unit remains energised with less than 7.5 V for 10 seconds or more,
it sets diagnosis code No. B210D.
PROBABLE CAUSES
- Damaged wiring harness or connector(s)
- Malfunction of battery
- Malfunction of e-Call control unit
DIAGNOSIS PROCEDURE
STEP 1. Check battery.
Perform the battery test. Check the battery terminals for looseness or contamination.
Q.
Is the check result normal?
Go to Step 2.
NO : Repair the battery terminals or replace the battery.
STEP 2. Resistance measurement at the e-Call control unit connector
(GND terminal)
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(1)Disconnect the e-Call control unit connector, and measure at the wiring harness
side.
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(2)Check the resistance between the e-Call relay box connector terminal GND and body
earth.
OK: Continuity exists (2 Ω or less)
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Q.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
STEP 3. Voltage measurement at the e-Call control unit connector (+B
terminal)
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(1)Disconnect the e-Call control unit connector, and measure at the wiring harness
side.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check the voltage between the e-Call control unit connector terminal +B
and body earth.
OK: Battery voltage
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Q.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
STEP 4. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the e-Call control unit.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check if diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the e-Call control unit (Refer to 
).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction).