Pinpoint Tests
Daytime Running Lamps (DRL)
Pinpoint Tests
Pinpoint Test Y: The Daytime Running Lamps (DRL) Are Inoperative
Normal Operation
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) provides a Pulse Width Modulated (PWM) 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
- Transaxle gear input
- SJB
PINPOINT TEST Y: THE DAYTIME RUNNING LAMPS (DRL) ARE INOPERATIVE
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Y1 VERIFY THE DRL OPERATION
- 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 Y2.
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Y2 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 Y3.
No
REFER to Headlamps. Testing and Inspection
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Y3 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 PIDs (IGN_A_ECU, IGN_O_ECU, IGN_R_ECU, IGN_S_ECU) while cycling the ignition switch through all its positions.
- Does the PID agree with the ignition switch positions?
Yes
GO to Y4.
No
REFER to Steering Column to diagnose the input from the ignition switch. Testing and Inspection
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Y4 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 its positions.
- Does the PID agree with the gear selection?
Yes
GO to Y5.
No
REFER to Transmission Control Systems to diagnose the transmission range input. Testing and Inspection
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Y5 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. TEST the system for normal operation.
No
ENABLE the DRL configuration. TEST the system for normal operation.
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