Pinpoint Test H: DTC B1218:51

Handles, Locks, Latches and Entry Systems






Pinpoint Tests


Pinpoint Test H: DTC B1218:51

Normal Operation

When an Integrated Keyhead Transmitter (IKT) key is programmed, the Remote Keyless Entry (RKE) Transmitter Identification Code (TIC) data from the key is received by the Instrument Panel Cluster (IPC). The IPC then sends the TIC data to the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN). The SJB stores the TIC data in memory and sends an acknowledgement back to the IPC that the TIC data was successfully programmed.

- DTC B1218:51 (Transmitter Identification Code: Not Programmed) - a continuous DTC that sets when the IPC sends the RKE TIC data to the SJB over the MS-CAN, and it does not receive a response from the SJB that the TIC data has been stored.

This pinpoint test is intended to diagnose the following:

- IKT programming
- MS-CAN
- SJB



PINPOINT TEST H: DTC B1218:51

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H1 CHECK FOR THE CORRECT RKE TRANSMITTERS


- 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.
- Are all the correct IKTs 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 COMMUNICATION WITH THE IPC AND SJB


- Enter the following diagnostic mode on the scan tool: Network Test .
- Does the IPC or SJB fail the network test?

Yes
REFER to Information Bus.

No
GO to H3.

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H3 REPROGRAM THE IKT KEYS


- Erase and program all of the IKT keys using the scan tool method. Refer to Antitheft and Alarm Systems.
- Erase all IPC DTCs.
- Enter the following diagnostic mode on the scan tool: IPC Self-Test .
- Is DTC B1218:51 retrieved again?

Yes
GO to H5.

No
GO to H4.

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H4 CHECK THE OPERATION OF THE RKE TRANSMITTER


- Press any button on the suspect IKT key.
- Does the RKE transmitter operate?

Yes
The system is operating normally. The concern may have been caused by an improperly programmed IKT key.

No
GO to Pinpoint Test G. Pinpoint Test G: The Remote Keyless Entry (RKE) Transmitter Is Inoperative

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H5 CHECK FOR CORRECT SJB OPERATION


- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB 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 SJB. REFER to Body Control Systems. 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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