Diagnostic Routine L

Diagnostic Routine L

Diagnostic Overview

The Remote Keyless Entry (RKE) Transmitter Has Poor Range Performance

Normal Operations and Fault Conditions

The RKE (Remote Keyless Entry) transmitter sends a radio signal to the BCM (Body Control Module) internal antenna based on the user selected RKE (Remote Keyless Entry) transmitter button. The BCM (Body Control Module) then carries out the selected action. The RKE (Remote Keyless Entry) transmitter has a normal operating range of 20 m (65.62 ft).

Visual Inspection and Diagnostic Pre-checks

- Inspect the RKE (Remote Keyless Entry) transmitter

- Inspect the RKE (Remote Keyless Entry) transmitter battery

- Inspect for aftermarket RKE (Remote Keyless Entry) systems

- High power devices

- TV/radio transmission towers

Pinpoint Test

1. CHECK FOR THE CORRECT RKE (Remote Keyless Entry) TRANSMITTERS

1. Check that the correct RKE (Remote Keyless Entry) transmitters are used with the vehicle. REFER to Integrated Keyhead Transmitter (IKT).

Are the correct RKE (Remote Keyless Entry) transmitters present?






2. CHECK ALL RKE (Remote Keyless Entry) TRANSMITTERS FOR POOR RANGE PERFORMANCE

1. NOTE: The 20 m (65.62 ft) measurement of range is not the standard but a guideline that clearly indicates a vehicle is experiencing normal range performance.
Check all RKE (Remote Keyless Entry) transmitters for normal range performance (less than 20 m (65.62 ft)).

Do all RKE (Remote Keyless Entry) transmitters experience poor range?






3. CHECK THE RKE (Remote Keyless Entry) TRANSMITTER BATTERY

1. NOTE: Do not clean off any grease from the battery terminals on the back surface of the circuit board.
Open the RKE (Remote Keyless Entry) transmitter.

2. Verify the correct battery is used (CR2032).

3. Remove the RKE (Remote Keyless Entry) transmitter battery and measure the voltage.

Is the voltage greater than 2.5 volts?






4. CHECK THE LOCATION OF THE VEHICLE AND THE APPROACH ANGLES AROUND THE VEHICLE

1. Make sure the poor performance is consistent in nature and is not from one approaching angle.

2. The RKE (Remote Keyless Entry) transmitter range performance may be degraded in certain locations. For example, if the vehicle is within 0.8 km (0.5 mi) of high-power devices or radio/TV towers, the operating distance of the transmitters may be reduced.

Is the poor range performance consistent around the vehicle?






5. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect all BCM (Body Control Module) connectors.

3. Repair:

- corrosion (install new connectors or terminals-clean module pins)
- damaged or bent pins- install new terminals pins
- pushed-out pins- install new pins as necessary

4. Reconnect all the BCM (Body Control Module) connectors and make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?