STEP 1. Using scan tool (M.U.T.-III) other system data list
Using the gateway-ECU data list, check the blind spot warning switch signal.(1) caution | To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III). |
Connect scan tool (M.U.T.-III). Refer to "How to connect Scan Tool (M.U.T.-III)
."
(2) Check the input signals from the blind spot warning switch.- When the blind spot warning switch is pressed.
| Item No. | Item name | Normal condition | Item 5 | BSW SW | ON |
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- When the blind spot warning switch is not pressed.
| Item No. | Item name | Normal condition | Item 5 | BSW SW | OFF |
|
OK: Normal condition is displayed.
Is the check result normal?
Go to Step 6. Go to Step 2.
STEP 2. Connectors check: gateway-ECU connector C-49, blind spot warning switch connector C-50.
STEP 3. Check the wiring harness between gateway-ECU connector C-49 (terminal No. 21) and blind spot warning switch connector C-50 (terminal No. 3).
STEP 4. Check the blind spot warning switch.
STEP 5. Using scan tool (M.U.T.-III) other system data list
Using the gateway-ECU data list, check the blind spot warning switch signal.- When the blind spot warning switch is pressed.
| Item No. | Item name | Normal condition | Item 5 | BSW SW | ON |
|
- When the blind spot warning switch is not pressed.
| Item No. | Item name | Normal condition | Item 5 | BSW SW | OFF |
|
OK: Normal condition is displayed.
Is the check result normal?
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ). Replace the gateway-ECU.
STEP 6. Check whether the DTC is set again.
Check again if the DTC is set in the BSW-ECU (master).(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Is the DTC set?
Replace the BSW-ECU (master). Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).