Pinpoint Tests

Daytime Running Lamps (DRL)

Pinpoint Tests


Pinpoint Test AF: The Daytime Running Lamps (DRL) Are Inoperative

Normal Operation

The fog lamps are utilized as the Daytime Running Lamps (DRL). When the ignition switch is in the RUN position, the headlamps are not on (from the autolamp system or manual control from the headlamp switch), the transaxle is not in PARK (P), the Smart Junction Box (SJB) energizes the fog lamp relay. This illuminates the fog lamps at full intensity.

This pinpoint test is intended to diagnose the following:

- Exterior lighting system input/output
- SJB configuration
- Ignition switch input
- Transaxle gear input
- SJB



PINPOINT TEST AF: THE DRL ARE INOPERATIVE

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AF1 VERIFY THE DRL OPERATION


- Ignition ON.
- Place the gear selector lever in any gear other than PARK (P).
- Are the DRL illuminated?

Yes
The system is operating correctly. INFORM the customer of the conditions required for the DRL to operate correctly.

No
GO to AF2.

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AF2 CHECK THE OPERATION OF THE FOG LAMPS


- Place the headlamp switch in the PARKING LAMPS ON position and engage the fog lamp switch.
- Do the fog lamps operate correctly?

Yes
GO to AF3.

No
REFER to Fog Lamps. Testing and Inspection

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AF3 CHECK THE IGNITION SWITCH INPUT


- Place the headlamp switch in the OFF position.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB ignition switch ACC (IGN_A_ECU), ignition switch OFF (IGN_O_ECU) and ignition switch RUN (IGN_R_ECU) PIDs while cycling the ignition switch through all positions (states).
- Do the PIDs agree with the ignition switch positions (states)?

Yes
GO to AF4.

No
REFER to Steering Column to diagnose the input from the ignition switch.

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AF4 CHECK THE TRANSAXLE GEAR INPUT


- Enter the following diagnostic mode on the scan tool: PCM DataLogger.
- Monitor the PCM transmission gear status PID (TR) while placing the gear selector lever through all positions.
- Does the PID agree with the gear selection?

Yes
GO to AF5.

No
REFER to Automatic Transmission/Transaxle &/or Transmission Control Systems to diagnose the transmission range input.

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AF5 CHECK THE SJB FOR DRL CONFIGURATION


- Enter the following diagnostic mode on the scan tool: SJB Module Programming.
- Check the SJB configuration and make sure the DRL feature is enabled.
- Is the SJB DRL configuration enabled?

Yes
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.

No
ENABLE the DRL configuration. TEST the system for normal operation.

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