Code No. C2242 Front sensor power line
OPERATION
The clearance warning control unit sets diagnosis code No.C2242 when it detects a short in the sensor power supply circuit (front side).
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When this diagnosis code is set, diagnosis codes C2230 to C2235 will not be set.
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TROUBLE JUDGEMENT
The condition below is satisfied:
- The system detects a malfunction in the sensor power supply monitoring circuit for at least three seconds.
PROBABLE CAUSES
- Malfunction of front corner clearance sensor
- Malfunction of forward distance warning sensor
- Malfunction of front blind spot warning sensor
- Malfunction of clearance warning control unit
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check the wiring harness wires between the front side sensor connectors and the clearance warning control unit.
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To check electric continuity, always select a resistance range of a multimeter.
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- Check the short to power supply and short to earth circuit in POUS line between the front corner clearance sensor (LH) connector and clearance warning control unit connector.
- Check the short to power supply and short to earth circuit in POUS line between the front corner clearance sensor (RH) connector and clearance warning control unit connector.
- Check the short to power supply and short to earth circuit in POUS line between the forward distance warning sensor (LH) connector and clearance warning control unit connector.
- Check the short to power supply and short to earth circuit in POUS line between the forward distance warning sensor (RH) connector and clearance warning control unit connector.
- Check the short to power supply and short to earth circuit in POUS line between the front blind spot warning sensor (LH) connector and clearance warning control unit connector.
- Check the short to power supply and short to earth circuit in POUS line between the front blind spot warning sensor (RH) connector and clearance warning control unit connector.
Q.
Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness.
STEP 2. Check the front side sensors.
Disconnect each of the front side sensors one after the other, and check whether diagnosis code C2242 is set.
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(1)Disconnect one of the front side sensor connectors.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(4)Check whether diagnosis code C2242 is set. If not, the corresponding sensor is defective.
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(5)Repeat the operation for the other front side sensors from Step 1.
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Q.
Is the check result normal?
Go to Step 3.
Replace the defective sensor (Refer to 
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STEP 3. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the clearance warning 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 clearance warning control unit (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).