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DTC Troubleshooting: B1657
DTC B1657: Rear Bumper LF Antenna Circuit Short
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DTC Description |
DTC |
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B1657 Rear Bumper LF Antenna Circuit Short |
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1. |
Problem verification:
Problem verification
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?1. |
Clear the DTCs with the HDS.
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?2. |
Select the MODE MENU from the HDS, then enter the SELF CHECK.
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?4. |
Check for DTCs with the HDS.
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DTC Description |
DTC |
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B1657 Rear Bumper LF Antenna Circuit Short |
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Is DTC B1657 indicated?
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Intermittent failure, the system is OK at this time. Check for loose or poor connections.? |
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2. |
Shorted wire check (EXT TR+, EXT TR- lines):
Shorted wire check (EXT TR+, EXT TR- lines)
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?1. |
Press the engine start/stop button to select the OFF mode. |
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?2. |
Disconnect the following connectors.
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?3. |
Check for continuity between test points 1 and 2 individually.
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Test condition |
OFF mode
Keyless access control unit connector A (32P): disconnected
Rear bumper LF antenna 2P connector: disconnected |
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Test circuit |
EXT TR+ |
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Test point 1 |
Keyless access control unit connector A (32P) No. 24 (LT GRN) |
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Test point 2 |
Body ground | |
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Test circuit |
EXT TR- |
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Test point 1 |
Keyless access control unit connector A (32P) No. 8 (GRY) |
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Test point 2 |
Body ground | |
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Is there continuity?
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Repair a short to ground in the wire.? |
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The EXT TR+ and EXT TR- wires are not shorted. Go to step 3. |
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3. |
Shorted wire check (EXT TR+ line to EXT TR- line):
Shorted wire check (EXT TR+ line to EXT TR- line)
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?1. |
Check for continuity between test points 1 and 2.
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Test condition |
OFF mode
Keyless access control unit connector A (32P): disconnected
Rear bumper LF antenna 2P connector: disconnected |
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Test circuit |
EXT TR+, EXT TR- |
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Test point 1 |
Keyless access control unit connector A (32P) No. 8 (GRY) |
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Test point 2 |
Keyless access control unit connector A (32P) No. 24 (LT GRN) | |
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Is there continuity?
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Repair a short in EXT TR+ wire to EXT TR- wire.? |
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The EXT TR+ and EXT TR- wires are OK. Go to step 4. |
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4. |
Determine possible failure area (Keyless access control unit, rear bumper LFantenna):
Determine possible failure area (Keyless access control unit, rear bumper LF antenna)
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?1. |
Reconnect the following connectors.
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?2. |
Press the engine start/stop button to select the ON mode. |
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?3. |
Select KEYLESS ACCESS CONTROL from the ONE-PUSH START system select menu with the HDS, and enter FUNCTIONAL TESTS.
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?4. |
Connect the voltmeter to test points 1 and 2.
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Test point 1 |
Rear bumper LF antenna 2P connector No. 1 (LT GRN) |
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Test point 2 |
Rear bumper LF antenna 2P connector No. 2 (GRY) | |
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?5. |
Select TRUNK/TAILGATE/REAR BUMPER ANTENNA with the HDS. | |
Is there voltage?
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