GM Service Manual Online
For 1990-2009 cars only

Object Number: 300097  Size: MF
Cell 10: IGN SW, HTDST LR, HTDST RR, HTDST LF, and HTDST RF Fuses
Cell 50: Class Serial Data Line 1 of 2
Cell 14: G301

Circuit Description

The RKE module runs this test every time the module processes a message from the transmitters.

Conditions for Setting the DTC

The module will set this DTC if it receives a transmission from a out of sync transmitter.

Action Taken When the DTC Sets

Stores a DTC B3108 in the RKE current memory.

No driver warning message will be displayed for this DTC.

Conditions for Clearing the MIL/DTC

The RKE module will clear this DTC after a valid transmission is received from a transmitter.

Diagnostic Aids

This DTC will stay in memory as current until it receives a valid transmission from the RKE transmitters then history until cleared. Obtain all transmitters from the customer and synchronize the transmitters.

Test Description

The numbers below refer to steps on the diagnostic table:

  1. Perform the Remote Keyless Entry Daignostic System Check before diagnosing DTC 3108.

  2. This repair is to check for known good transmitter synchronization.

  3. This repair requires the customer's additional transmitters.

  4. This step requires battery replacement with battery type 2032.

Step

Action

Value(s)

Yes

No

1

Were you sent here from Remote Keyless Entry Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Remote Keyless Entry

2

Has the transmitter been synchronized?

--

Go to Step 4

Go to Step 3

3

Synchronize transmitter.

Refer to Transmitter Synchronization .

Is the synchronizing complete?

--

Go to Remote Keyless Entry System Check

--

4

Test with a known good transmitter to determine battery quality in suspect transmitter.

Does the transmitter function properly?

--

Go to Step 5

Go to Step 6

5

Replace the transmitter battery with known good battery.

Refer to Transmitter Battery Replacement .

Does the transmitter function properly?

--

Go to Remote Keyless Entry System Check

Go to Step 8

6

  1. Connect scan tool
  2. Enter RKE Diagnsis
  3. Check last button pressed function to assure proper transmitter operation.

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

--

Go to Remote Keyless Entry System Check

Go to Step 7

7

Replace the RKE module.

Refer to Remote Control Door Lock Receiver Replacement .

Is the repair complete?

--

Go to Remote Keyless Entry System Check

--

8

Replace the transmitter.

Refer to Transmitter Replacement .

Is the repair complete?

--

Go to Remote Keyless Entry System Check

--