For 1990-2009 cars
Keyless Entry Component Views
Keyless Entry Schematics

### Circuit Description

The remote keyless entry (RKE) module performs internal tests on the EEPROM. A test is performed each time that the RKE module performs a write function to a memory address in the EEPROM. The RKE module reads back the data that has been written and compares it to the data. If the data does not match after three consecutive write and verify attempts, the RKE module will indicate a write malfunction.

### Conditions for Setting the DTC

The data read back after a write does not match the data being written three consecutive times.

The RKE module detects an internal write malfunction.

The condition occurs when data is being written.

### Action Taken When the DTC Sets

DTC B1007 is stored in the RKE memory.

No driver warning message will be displayed for this DTC.

The RKE module will store the value being written in another memory address in the EEPROM.

### Conditions for Clearing the DTC

This DTC requires a successful write in order to change from current to history.

The RKE module no longer detects an internal write malfunction.

A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.

Use the On-Boards clearing DTCs feature.

Use a scan tool.

### Diagnostic Aids

Because the EEPROM cannot be removed from the RKE module and DTC B1007 is an internal RKE malfunction, replace the RKE module. Refer to the diagnostic table.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.
1 | Was the Remote Keyless Entry Diagnostic System Check performed? | -- | Go to Step 2 | Go to Remote Keyless Entry System Check
2 | Determine if the transmitter is synchronized. Is the transmitter synchronized? | -- | Go to Step 4 | Go to Step 3
3 | Synchronize the transmitter. Refer to Transmitter Synchronization . Is synchronization complete? | -- | Go to Remote Keyless Entry System Check | Go to Step 5
4 | Test with a known good transmitter to determine the battery quality in the suspect transmitter. Does the good transmitter operate correctly? | -- | Go to Step 5 | Go to Step 6
5 | Replace the suspect transmitter battery with a known good battery. Refer to Transmitter Battery Replacement . Does the transmitter operate correctly? | -- | Go to Remote Keyless Entry System Check . | Go to Step 9
6 |

1. Connect the scan tool.
2. Enter RKE Diagnosis.
3. Inspect the last button pressed function to ensure correct transmitter operation.

Does the scan tool show the correct transmitter used and function requested?

--

Go to Step 7

Go to Step 8

7 | Replace the BCM. Is the repair complete? | -- | Go to Remote Keyless Entry System Check . | --
8 | Replace the RKE module. Refer to Receiver Replacement . Is the repair complete? | -- | Go to Remote Keyless Entry System Check . | --
9 | Replace the transmitter. Is the repair complete? | -- | Go to Remote Keyless Entry System Check . | --