B2300 L4-2.3L (2008)
Daytime Running Lamp: Initial Inspection and Diagnostic Overview
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect the following for obvious signs of electrical damage.
Visual Inspection Chart
3. Make sure the headlamps operate correctly. Correct any concerns before proceeding to the next step. See HEADLAMPS.
4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
NOTE:
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Make sure the headlamp switch is in the OFF position.
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Make sure the multifunction switch is in the LOW BEAM position.
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Make sure to use the latest scan tool software release.
5. If the cause is not visually evident, connect the integrated diagnostic system (IDS) or equivalent tester to the data link connector (DLC).
NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
6. If the IDS or equivalent tester does not communicate with the VCM:
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Check the VCM connection to the vehicle.
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Check the IDS or equivalent tester connection to the VCM.
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See PINPOINT TEST 7: NO MODULE/NETWORK COMMUNICATION - NO POWER TO THE DIAGNOSTIC TOOL to diagnose no
communication with the scan tool. See: Body and Frame/Body Control Systems/Testing and Inspection/Pinpoint Tests/Pinpoint Test 7: No
Module/Network Communication - No Power to the Diagnostic Tool
7. If the scan tool does not communicate with the vehicle:
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Verify the ignition key is in the ON position.
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Verify the scan tool operation with a known good vehicle.
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See SYMPTOM TROUBLESHOOTING CHART - COMMUNICATIONS NETWORK to diagnose no response from the powertrain control
module (PCM). See: Body and Frame/Body Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures
8. Carry out the network test:
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If the scan tool responds with no communication for one or more modules, see SYMPTOM TROUBLESHOOTING CHART -
COMMUNICATIONS NETWORK. See: Body and Frame/Body Control Systems/Testing and Inspection/Symptom Related Diagnostic
Procedures
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If the network test passes, retrieve and record the continuous memory diagnostic trouble codes (DTCs).
9. Clear the continuous DTCs and carry out the self-test diagnostics for the SJB.
10. If the DTCs retrieved are related to the concern, see SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) INDEX. For all
other DTCs, see DIAGNOSTIC TROUBLE CODE (DTC) INDEX - B, C AND U CODES. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions/Troubleshooting/Lighting Systems
11. If no DTCs related to the concern are retrieved, see SYMPTOM TROUBLESHOOTING CHART - DAYTIME RUNNING LAMPS (DRL). See:
Symptom Related Diagnostic Procedures