Code No. P1B0B:
ABS vehicle speed data error
Code No. P1B22: FL wheel speed data error
Code
No. P1B23: FR wheel speed data error
Code No. P1B24: RL wheel speed data error
Code
No. P1B25: RR wheel speed data error
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If there is any problem in the CAN bus lines,
an incorrect diagnosis code may be set. Prior to this diagnosis, always diagnose the CAN bus
lines.
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OPERATION
- ASC-ECU communicates with EV-ECU via CAN.
DIAGNOSIS CODE SET CONDITIONS
- If the vehicle speed information received from the ASC-ECU
via the CAN is abnormality, the diagnosis code No. P1B0B will be set.
- If the front left wheel speed data received from the ASC-ECU via the CAN is abnormality,
the diagnosis code No. P1B22 will be set.
- If the front right wheel speed data received from the ASC-ECU via the CAN is abnormality,
the diagnosis code No. P1B23 will be set.
- If the rear left wheel speed data received from the ASC-ECU via the CAN is abnormality,
the diagnosis code No. P1B24 will be set.
- If the rear right wheel speed data received from the ASC-ECU via the CAN is abnormality,
the diagnosis code No. P1B25 will be set.
PROBABLE CAUSES
- Malfunction of the ASC-ECU vehicle speed system
- Malfunction of the EV-ECU
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STEP 1. M.U.T.-III CAN bus diagnosis
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Use the M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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 Go to Step 3.
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 Repair the CAN bus line. (Refer to GROUP 54C - Troubleshooting  .)
Then go to Step 2.
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STEP 2. Diagnosis code recheck after resetting CAN bus lines
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Check again if one or some of the diagnosis codes are set to the EV-ECU from No. P1B0B,
No. P1B22, No. P1B23, No. P1B24 or No. P1B25.
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(1)Erase the stored diagnosis code.
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(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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Go to Step 3.
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This diagnosis is complete.
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STEP 3. Use M.U.T.-III to confirm a diagnosis code of other systems.
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Check if diagnosis code is set to the ASC-ECU.
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Q.
Is the diagnosis code set?
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Diagnose the ASC. (Refer to GROUP 35C - Diagnosis Code Chart .)
Then go to Step 5.
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Go to Step 4.
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STEP 4. Diagnosis code recheck
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Check again if the diagnosis code is set to the EV-ECU.
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(1)Erase the stored diagnosis code.
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(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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Replace the EV-ECU. (Refer to .) Then go to Step
5.
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction .)
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STEP 5. Diagnosis code recheck
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Check again if the diagnosis code is set to the EV-ECU.
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(1)Erase the stored diagnosis code.
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(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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Return to Step 1.
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The diagnosis is complete.
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