Pinpoint Tests

Daytime Running Lamps (DRL)


Pinpoint Tests


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

Normal Operation

When the ignition switch is in the RUN position, the headlamps are not on, the transmission is not in PARK (P), the Smart Junction Box (SJB) provides a pulse-width modulated voltage to the low beam headlamps. This illuminates the headlamps at a reduced intensity.

This pinpoint test is intended to diagnose the following:

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



PINPOINT TEST Z: THE DRL ARE INOPERATIVE

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Z1 VERIFY THE DRL OPERATION


- Ignition ON.
- Place the headlamp switch in the OFF position.
- If equipped with an automatic transaxle, place the gear selector lever in any gear other than PARK (P).
- If equipped with a manual transaxle, release the parking brake.
- Do the DRL illuminate?

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

No
GO to Z2.

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Z2 CHECK FOR RECORDED SJB DTCs


- Review the recorded results from the SJB self-test.
- Are any DTCs present?

Yes
REFER to Body Control Systems.

No
GO to Z3.

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Z3 CHECK THE OPERATION OF THE HEADLAMPS


- Place the headlamp switch in the HEADLAMPS ON position and observe the headlamps.
- Do the headlamps operate correctly?

Yes
GO to Z4.

No
REFER to Headlamps Testing and Inspection.

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Z4 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 PID (IGN_O_ECU, IGN_A_ECU, IGN_R_ECU, and IGN_S_ECU) while cycling the ignition switch through all its positions.
- Does the PID agree with the ignition switch positions?

Yes
GO to Z5.

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

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Z5 CHECK THE TRANSMISSION GEAR INPUT


- Ignition ON.
- 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 its positions.
- Does the PID agree with the gear selection?

Yes
GO to Z6.

No
REFER to Transmission Control Systems to diagnose the digital Transmission Range (TR) sensor input. Testing and Inspection

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Z6 CHECK THE SJB FOR DRL CONFIGURATION


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

Yes
INSTALL a new SJB. TEST the system for normal operation.

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

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