DTC B1129 [ADVANCED KEYLESS ENTRY AND START SYSTEM]SM2445814
DTC B1129 [ADVANCED KEYLESS ENTRY AND START SYSTEM]

id09021g803500

DTC B1129

Keyless antenna (interior, middle)
DETECTION CONDITION
Keyless antenna dose not operated
POSSIBLE CAUSE
• Open or short circuit in wiring harness between keyless control module and keyless antenna (interior, middle)
• Keyless antenna (interior, middle) malfunction
• Keyless control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT COMMUNICATION CIRCUIT FOR CONTINUITY
• Disconnect keyless control module connector and keyless antenna (interior, middle) connector.
• Inspect the wiring harness between keyless antenna (interior, middle) terminal A and keyless control module terminal 1M, and keyless antenna (interior, middle) terminal B and keyless control module terminal 1N for the following:
― Short to ground
― Short to power supply
― Open circuit
• Is there continuity?
Yes
Replace keyless antenna (interior, middle).
(See KEYLESS ANTENNA REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND START SYSTEM].)
Go to next step.
No
Repair the wiring harness between the keyless antenna (interior, middle) and keyless control module.
Go to next step.
2
INSPECT KEYLESS CONTROL MODULE
• Turn the ignition switch to the ON position.
• Is the DTC displayed?
― M-MDS: B1129
Yes
Replace the keyless control module and perform the resetting procedure for the advanced keyless system when replacing the keyless control module.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND START SYSTEM].)
No
DTC troubleshooting completed.