Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSACURA2011TSX SPORT WAGON L4-2.4LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSTROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE B
2011 Acura TSX Sport Wagon L4-2.4L
Troubleshooting - B-CAN System Diagnosis Test Mode B
2011 Acura TSX Sport Wagon L4-2.4LSECTION Troubleshooting - B-CAN System Diagnosis Test Mode B
Multiplex Integrated Control System Troubleshooting - B-CAN System Diagnosis Test Mode B
Do this diagnosis if any of the control units are not communicating (NOT AVAILABLE is displayed in the HDS) as found by the B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.
1. Using the HDS, select the system that has the symptom from the BODY ELECTRICAL SYSTEM SELECT menu.
2. Select DTCs, and then check for loss of communication DTCs.
Are any loss of communication DTCs indicated?
YES -
Go to step 3.
NO -
Faulty driver's MICU; replace the under-dash fuse/relay box, USA models Drivers Under-Dash Fuse/Relay Box (Drivers MICU) Removal and Installation (USA models), Canada models Drivers Under-Dash Fuse/Relay Box (Drivers MICU) Removal and Installation (USA models).οΏ½
3. Do the power, ground, and communication part of the input test for the unit(s) not communicating with the HDS.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.