Code No.B2101
IG SW start POS.circuit low
Code No.B2102 IG SW start POS.circuit high
caution |
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TROUBLE JUDGMENT
JUDGEMENT CRITERIA
B2101
- Status of ignition switch: OFF position
- Ignition switch position information from the ETACS-ECU: ON
- Status of ignition switch: ON position
- Ignition switch position information from the ETACS-ECU: OFF
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of the WCM
- Malfunction of the ignition switch
- Damaged wiring harness and connectors
- Malfunction of ETACS-ECU
DIAGNOSIS PROCEDURE |
STEP 1. M.U.T.-III CAN bus diagnostics |
Use M.U.T.-III to diagnose the CAN bus lines. |
Q.
Is the check result normal?
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Go to Step 2. |
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Repair the CAN bus line (Refer to GROUP 54C -
Troubleshooting ).
On completion, go to Step 2. |
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STEP 2. Connector check: C-317 ETACS-ECU connector, C-33 WCM connector |
Q.
Is the check result normal?
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Go to Step 3. |
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Repair the defective connector. |
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STEP 3. Check the wiring harness between the C-317 ETACS-ECU connector terminal No. 5 and the C-33 WCM connector terminal No. 9. |
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Q.
Is the check result normal?
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Go to Step 4. |
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Repair the wiring harness. |
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STEP 4. M.U.T.-III other system data list |
Use M.U.T.-III to check the ETACS-ECU service data. Refer to GROUP 54A -
ETACS -
Service
Data Reference Table . |
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OK: Battery voltage |
Q.
Is the check result normal?
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Go to Step 5. |
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Perform troubleshooting for ETACS-ECU (Refer to GROUP 54A -
ETACS -
Troubleshooting). |
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STEP 5. Check whether the diagnosis code is reset. |
(1)Erase the diagnosis code. |
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position. |
(3)Check if the diagnosis code is set. |
Q.
Is the diagnosis code set?
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Replace WCM and register the ID codes (Refer to ). |
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Intermittent malfunction is suspected (Refer to GROUP 00 -
How to Use
Troubleshooting/Inspection Service Points -
How to Deal with Intermittent Malfunction ). |
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