DTC B18C7, B1E77
DTC B18C7 : Open in the Left Side BSI Radar Unit Indicator Circuit
DTC B1E77 : Open in the Right Side BSI Radar Unit Indicator Circuit
NOTE: Before you troubleshoot, review the general troubleshooting information .
| DTC Description | DTC |
|---|---|
| B18C7 Open in the left side BSI radar unit indicator circuit | |
| B1E77 Open in the right side BSI radar unit indicator circuit |
DTC (BSI)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS.
-3. Turn the vehicle to the OFF (LOCK) mode.
-4. Turn the vehicle to the ON mode, then wait for at least 2 seconds.
-5. Check for DTCs with the HDS.
DTC Description DTC B18C7 Open in the left side BSI radar unit indicator circuit DTC Description DTC B1E77 Open in the right side BSI radar unit indicator circuit Is DTC B18C7 or B1E77 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting .
- BSI alert indicator check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector(s) related to the DTC.
Left BSI alert indicator 2P connector Right BSI alert indicator 2P connector -3. Connect terminals 1 and body ground with a jumper wire.
Test condition Vehicle OFF (LOCK) mode Left BSI alert indicator 2P connector: disconnected Right BSI alert indicator 2P connector: disconnected Test point 1 Left BSI alert indicator 2P connector (female terminals) No. 1: Test point 2 Body ground Test point 1 Right BSI alert indicator 2P connector (female terminals) No. 1: Test point 2 Body ground -4. Turn the vehicle to the ON mode.
-5. Check for DTCs with the HDS.
DTC Description DTC B18C7 Open in the left side BSI radar unit indicator circuit B1E77 Open in the right side BSI radar unit indicator circuit B18C5 Short to GND in the left side BSI radar unit indicator circuit B1E75 Short to GND in the right side BSI radar unit indicator circuit Does DTC B18C7 change to DTC B18C5, or DTC B1E77 change to B1E75?
YES
Go to step 3.
NO
Go to step 4.
- Open wire check (GND line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Remove the jumper wire from the BSI alert indicator 2P connector.
-3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Left BSI alert indicator 2P connector: disconnected Right BSI alert indicator 2P connector: disconnected Test point 1 Left BSI alert indicator 2P connector (female terminals) No. 2: Test point 2 Body ground Test point 1 Right BSI alert indicator 2P connector (female terminals) No. 2: Test point 2 Body ground Is there continuity?
YES
Replace the appropriate BSI alert indicator .
NO
Repair an open in the wire between the BSI alert indicator and the body ground at G401 (left BSI alert indicator), G402 (right BSI alert indicator).
- Open wire check (BSI_L_IND, BSI_R_IND lines)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Remove the jumper wire from the BSI alert indicator 2P connector.
-3. Disconnect the following connector(s) related to the DTC.
Left side BSI radar unit 6P connector Right side BSI radar unit 6P connector -4. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Left side BSI radar unit 6P connector: disconnected Right side BSI radar unit 6P connector: disconnected Left BSI alert indicator 2P connector: disconnected Right BSI alert indicator 2P connector: disconnected Test point 1 Left side BSI radar unit 6P connector No. 2 Test point 2 Left BSI alert indicator 2P connector (female terminals) No. 1: Test point 1 Right side BSI radar unit 6P connector No. 2 Test point 2 Right BSI alert indicator 2P connector (female terminals) No. 1: Is there 1.0 Ω or less?
YES
Replace the appropriate BSI radar unit .
NO
Repair an open in the wire between the BSI radar unit and the BSI alert indicator.