Pinpoint Test H: The Remote Keyless Entry (RKE) Transmitter Is Inoperative
Handles, Locks, Latches and Entry Systems
Pinpoint Tests
Pinpoint Test H: The Remote Keyless Entry (RKE) Transmitter Is Inoperative
Normal Operation
The Remote Keyless Entry (RKE) feature is controlled by the Tire Pressure Monitor (TPM) module and the Body Control Module (BCM). When a button is pressed on an Integrated Keyhead Transmitter (IKT) the Transmitter Identification Code (TIC) and RKE command is received by the internal TPM antenna. If the TPM module determines that it is a valid and programmed TIC, it sends the RKE command and TIC to the BCM over the Medium Speed Controller Area Network (MS-CAN). When the BCM receives the RKE command, it carries out the command by controlling the door locks or activating the horn and turn signals for the panic alarm.
The RKE transmitters and the BCM also utilize a rolling code to prevent the code from being "captured" by a code grabber. The system advances the counter in the RKE transmitter and the BCM every time an RKE transmitter button is pressed.
- DTC B10AB: 00 (Remote Keyless Entry Synchronization: No Sub Type Information) - sets when the BCM detects the rolling counter received from an RKE transmitter is out of synchronization with the rolling counter stored in the module.
- DTC B1218: 00 (Transmitter Identification Code: No Sub Type Information) - sets when the BCM detects an invalid Transmitter Identification Code (TIC) from an IKT.
This pinpoint test is intended to diagnose the following:
- IKT
- IKT battery
- IKT button pressed a substantial amount of times while outside the range of the vehicle
- IKT programming
- TPM module
- BCM
PINPOINT TEST H: THE RKE TRANSMITTER IS INOPERATIVE
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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H1 CHECK FOR THE CORRECT RKE TRANSMITTERS
- NOTE: Make sure the IKTs are those provided with the OEM system and not from an aftermarket system, or a dealer-installed system that may have been installed on the vehicle.
- Check that the correct IKTs are used with the vehicle. Compare the IKTs with the one shown in Handles, Locks, Latches and Entry Systems Description and Operation in the Description and Operation information.
- Are the correct RKE transmitters present?
Yes
GO to H2.
No
The system cannot be tested without the correct IKTs. INFORM the customer that the correct IKTs must be present to proceed with diagnosis of the system.
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H2 CHECK FOR TPMS DTCs
- Check the recorded results from the BCM self-test.
- Are any TPMS DTCs recorded?
Yes
DIAGNOSE all TPMS DTCs first. REFER to Wheels and Tires Testing and Inspection.
No
GO to H3.
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H3 CHECK THE RECORDED BCM DTCs FROM THE SELF-TEST
- Check the recorded results from the BCM self-test.
- Are any DTCs recorded?
Yes
For DTC B10AB: 00 GO to H4.
For DTC B1218: 00 GO to H5.
For all other DTCs, REFER to DTC Charts. Diagnostic Trouble Code Tests and Associated Procedures
No
GO to H5.
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H4 RESYNCHRONIZE THE INOPERATIVE IKT
- Ignition OFF.
- Ignition ON.
- Ignition OFF.
- Press any button on the IKT.
- Does the IKT operate?
Yes
The system is OK. CLEAR the DTCs. REPEAT the self-test.
No
GO to H5.
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H5 MAKE SURE THE RKE TRANSMITTER SIGNAL IS BEING RECEIVED
- Enter the following diagnostic mode on the scan tool: BCM DataLogger .
- Press a button on the IKT while observing the BCM PIDs (TIC_LAST_BC and LST_RKE_xMTR).
- Does the Transmitter Identification Code (TIC) and RKE command show up on the scan tool screen when a button is pressed?
Yes
GO to H6.
No
GO to H7.
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H6 CHECK IF THE RKE TRANSMITTERS ARE PROGRAMMED
- Enter the following diagnostic mode on the scan tool: BCM DataLogger .
- Press a button on the IKT and compare the BCM PID (TIC_LAST_BC) with the PIDs (TIC_01_BCM, 2, 3, 4, 7, 8, 9, or 10).
- Does the TIC displayed match any of the TICs stored in memory?
Yes
GO to H9.
No
PROGRAM the inoperative IKT individually or PROGRAM all the IKTs. REFER to Anti-Theft - Passive Anti-Theft System (PATS) Key Programming for the programming procedures. If all the IKTs are to be programmed, INFORM the customer that any IKTs not present need to be programmed. CLEAR the DTCs. REPEAT the self-test.
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H7 CHECK THE IKT BATTERY
- Using a thin coin, open the IKT.
- Do not clean off any grease from the battery terminals on the back surface of the circuit board.
- Verify the correct battery is used (CR2032).
- Remove the IKT battery and measure the voltage.
- Is the voltage greater than 2.5 volts?
Yes
GO to H8.
No
INSTALL a new battery (make sure the battery is seated correctly). DO NOT reprogram the IKT (weak or dead batteries do not erase TICs from memory). TEST the system for normal operation.
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H8 CHECK FOR NORMAL OPERATION WITH A KNOWN GOOD IKT
- Enter the following diagnostic mode on the scan tool: BCM DataLogger .
- Use the customer's second IKT, or a known good RKE transmitter that is correct for the vehicle, press a button on the IKT while observing the BCM PID (TIC_LAST_BC).
- Does the TIC show up on the scan tool when a button is pressed?
Yes
REPLACE the inoperative IKT and PROGRAM the new IKT individually or PROGRAM all the IKTs. REFER to Anti-Theft - Passive Anti-Theft System (PATS) Key Programming for the programming procedures. If all the IKTs are to be programmed, INFORM the customer that any IKTs not present need to be programmed. CLEAR the DTCs. REPEAT the self-test.
No
GO to H9.
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H9 CHECK FOR CORRECT BCM OPERATION
- Disconnect all the BCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the BCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new BCM. REFER to Multifunction Electronic Modules Service and Repair. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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