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DTC Troubleshooting: B1129
DTC B1129: Driver's door knob switch input Circuit Malfunction (Simultaneous input of lock and unlock signal)
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DTC Description |
DTC |
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B1129 Driver's door knob switch input Circuit Malfunction (Simultaneous input of lock and unlock signal) |
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NOTE: Refer to the Electrical Wiring Diagrams for the location of the under-dash fuse/relay box connectors.
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1. |
Keyless/power door locks/security system check 1:
Keyless/power door locks/security system check 1
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?1. |
With the driver's door lock knob switch in the lock position, check the parameter(s) below with the HDS.
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Signal |
Current conditions |
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Values |
Unit |
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Driver's Door Lock Knob Switch(LOCK) |
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Driver's Door Lock Knob Switch(UNLOCK) |
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Are both information indicators ON?
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Intermittent failure, the system is OK at this time. |
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2. |
Determine possible failure area (driver's door latch, others):
Determine possible failure area (driver's door latch, others)
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?1. |
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode. |
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?2. |
Disconnect the following connector.
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?3. |
Check the parameter(s) below with the HDS.
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Signal |
Current conditions |
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Values |
Unit |
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Driver's Door Lock Knob Switch(LOCK) |
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Driver's Door Lock Knob Switch(UNLOCK) |
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Is either information indicator ON?
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3. |
Shorted wire check (DR SILCON UNLOCK, DR SILCON LOCK lines):
Shorted wire check (DR SILCON UNLOCK, DR SILCON LOCK lines):
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?1. |
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode. |
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?2. |
Disconnect the following connector.
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?3. |
Check for continuity between test points 1 and 2 individually.
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Test condition |
IG LOCK (0) or OFF mode
Driver's door latch 10P connector: disconnected
Under-dash fuse/relay box connector P (24P): disconnected |
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Test circuit |
DR SILCON UNLOCK |
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Test point 1 |
Under-dash fuse/relay box connector P (24P) No. 10 (LT BLU) |
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Test point 2 |
Body ground | |
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Test circuit |
DR SILCON LOCK |
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Test point 1 |
Under-dash fuse/relay box connector P (24P) No. 9 (BLU) |
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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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