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 B: Unable To Program Keys Using Two Programmed Keys
- Normal Operation and Fault Conditions
When the BCM enters a key programming state, it activates the PATS transceiver to read the key in the ignition lock cylinder. If a valid PATS key is used and no concerns with PATS are present, the key is programmed into the BCM memory.
REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition BCM B10D7:05 PATS Key: System Programming Failures Sets when a PATS key is not successfully programmed into the BCM. BCM U202B:61 In-Use Application Signing Key: Signal Calculation Failure Sets when the BCM detects a fault when the ignition is cycled from any other state to the OFF state. BCM U202B:62 In-Use Application Signing Key: Signal Compare Failure Sets when the BCM detects a fault when the ignition is cycled from any other state to the OFF state. Possible Sources
- PATS key not programmed
Visual Inspection and Pre-checks
- Inspect the PATS key for damage.
- Verify the correct key is used.
- B1 CHECK THE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE SELF-TEST
- Review the Diagnostic Trouble Codes (DTCs) from the BCM self-test.
Is DTC B10D5:13, B10D7:87, B10D9:87, C113A:11 or C113A:15 present?
Yes For DTC B10D5:13, GO to Pinpoint Test G For DTC B10D7:87, GO to Pinpoint Test C For DTC B10D9:87, GO to Pinpoint Test E For DTC C113A:11 or C113A:15, GO to Pinpoint Test F No GO to B2 - B2 CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) KEY
- Verify the correct PATS keys are used with the vehicle.
Are the correct PATS keys used?
Yes PROGRAM the key again. If key programming fails, DISCARD the suspect key and PROGRAM a new key. REFER to: Anti-Theft Key Programming - Scan Tool . No OBTAIN the correct key for the vehicle. PROGRAM the new key. REFER to: Anti-Theft Key Programming - Scan Tool .
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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.