NO.9 AUTO HOLD DOES NOT WORK [DYNAMIC STABILITY CONTROL (DSC)]
id0403b2899000
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9 |
AUTOHOLD does not work |
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POSSIBLE CAUSE
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• Stuck AUTOHOLD switch in off position
• Open circuit in wiring harness between electric parking brake switch terminal F and body ground
• Open circuit in wiring harness between electric parking brake control module terminal W and electric parking brake switch terminal D
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Diagnostic procedure
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STEP |
INSPECTION |
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 [DSC HU/CM].)
• 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].)
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No
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Go to the next step.
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2
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INSPECT AUTOHOLD SWITCH
• Switch the ignition off.
• Disconnect the negative battery terminal.
• Disconnect the electric parking brake switch connector.
• Inspect the AUTOHOLD switch.
• 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.
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3
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INSPECT AUTOHOLD SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT
• Inspect the wiring harness for continuity between electric parking brake switch terminal F (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Go to the next step.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between electric parking brake switch terminal F and body ground.
If there is a common connector:
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has an open circuit.
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4
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INSPECT AUTOHOLD SWITCH CIRCUIT FOR OPEN CIRCUIT
• Disconnect the electric parking brake control module connector.
• Inspect the wiring harness for continuity between electric parking brake control module terminal W (wiring harness-side) and electric parking brake switch terminal D (wiring harness-side).
• Is there continuity?
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Yes
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Replace the electric parking brake control module.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between electric parking brake control module terminal W and electric parking brake switch terminal D.
If there is a common connector:
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has an open circuit.
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