Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test 4: The Doors Do Not Lock/Unlock Using The Remote Keyless Entry (RKE) Transmitter
2009 Mazda B4000 V6-4.0LSECTION Pinpoint Test 4: The Doors Do Not Lock/Unlock Using The Remote Keyless Entry (RKE) Transmitter
PINPOINT TEST 4: THE DOORS DO NOT LOCK/UNLOCK USING THE REMOTE KEYLESS ENTRY (RKE) TRANSMITTER
Normal Operation
Remote locking and unlocking of the doors is accomplished by the smart junction box (SJB) receiving a command message from the remote keyless entry (RKE) transmitter. The SJB processes the command and provides voltage and ground to the door lock actuators.
DTC B1139 (Invalid Transmitter Identification Code) - is a continuous DTC that sets when the SJB detects that an RKE transmitter is sending an invalid transmitter identification code.
This pinpoint test is intended to diagnose the following:
- RKE transmitter battery
- RKE transmitter programming
- RKE transmitter
- Aftermarket systems
- High power devices
- TV/radio transmission towers
- SJB
NOTE:All RKE transmitters must be present to begin diagnosis of the RKE system.
NOTE:Aftermarket or dealer-installed systems may adversely affect the RKE system operation. These systems should be disconnected before diagnosing any RKE concerns.
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Step 7-Step 9:
Step 10:
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.