NO.8 AUTO HOLD DOES NOT WORK [DYNAMIC STABILITY CONTROL (DSC)]
NO.8 AUTO HOLD DOES NOT WORK [DYNAMIC STABILITY CONTROL (DSC)]
SM2335156
id0403b2898900
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Troubleshooting item |
AUTOHOLD does not work |
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Possible cause
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• Stuck AUTOHOLD switch in off position
• Electrical supply unit (ESU) detects a malfunction
• Open circuit in AUTOHOLD switch signal circuit
• Open circuit in AUTOHOLD switch ground circuit
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Diagnostic procedure
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Step |
Inspection |
Results |
Action |
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1
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CONFIRM DSC HU/CM DTC
• Retrieve the DSC HU/CM DTC using the M-MDS. (See DTC INSPECTION.)
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [DSC HU/CM (US)].)
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No
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Go to the next step.
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2
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CONFIRM ELECTRICAL SUPPLY UNIT DTC
• Retrieve the electrical supply unit using the M-MDS. (See DTC INSPECTION.)
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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3
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INSPECT AUTOHOLD SWITCH
• Inspect the AUTOHOLD switch. (See AUTO HOLD SWITCH INSPECTION.)
• Is the AUTOHOLD switch normal?
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Yes
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Go to the next step.
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No
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Replace the AUTOHOLD switch, and perform the repair completion verification.
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4 *
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INSPECT AUTOHOLD SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT
• Inspect the ground circuit for an open circuit. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location, and perform the repair completion verification.
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5 *
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INSPECT AUTOHOLD SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect the signal circuit for an open circuit. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (US)].)
Perform the repair completion verification.
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No
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Repair or replace the malfunctioning location, and perform the repair completion verification.
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Repair completion verification
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VERIFY THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Has the malfunction symptom been eliminated?
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Yes
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Complete the symptom troubleshooting.
Explain to the customer what has been repaired.
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No
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
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• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.