DTC C0040:29 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]
id09021c405400
DETECTION CONDITION
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Brake switch and brake switch2 link malfunction
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POSSIBLE CAUSE
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• STOP 5 A fuse malfunction
• Connector or terminal malfunction
• Short circuit to ground or power supply in wiring harness between brake switch connector terminal C and keyless control module connector terminal 3E
• Short circuit to ground or power supply in wiring harness between PCM connector terminal 1AF and keyless control module connector terminal 3E
• Short circuit to ground or power supply in wiring harness between brake switch connector terminal D and keyless control module connector terminal 3S
• Open circuit in wiring harness between brake switch connector terminal A and battery
• Open circuit in wiring harness between brake switch connector terminal B and body ground
• Brake switch malfunction
• PCM malfunction
• Keyless control module malfunction
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Diagnostic Procedure
Step |
Inspection |
Action |
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1
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INSPECT STOP 5 A FUSE
• Switch the ignition to off.
• Disconnect the negative battery cable.
• Remove the STOP 5 A fuse.
• Inspect the fuse.
• Is the STOP 5 A fuse 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 STOP 5 A fuse.
After replacement, go to Step 10.
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2
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INSPECT BRAKE SWITCH CONNECTOR CONDITION
• Disconnect the brake switch connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Is the connector 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/replace the connector or terminal.
After repair procedure, go to Step 10.
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3
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INSPECT BRAKE SWITCH
• Inspect the brake switch.
(See BRAKE SWITCH INSPECTION.)
• Is the brake 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 brake switch.
After replacement, go to Step 10.
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4
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INSPECT PCM CONNECTOR CONDITION
• Disconnect the PCM connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Is the connector 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/replace the connector or terminal.
After repair procedure, go to Step 10.
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5
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INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION
• Disconnect the keyless control module connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Is the connector 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/replace the connector or terminal.
After repair procedure, go to Step 10.
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6
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INSPECT BRAKE SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND
• Inspect for continuity between the following connector terminals and body ground.
• Is there continuity?
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Yes
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Repair/replace the wiring harness.
After repair procedure, go to Step 10.
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No
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Go to the next step.
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7
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INSPECT BRAKE SWITCH CIRCUIT FOR SHORT CIRCUIT TO POWER SUPPLY
• Reconnect the negative battery cable.
• Switch the ignition to ON.
• Measure the voltage at following connector terminals.
• Can the voltage be measured?
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Yes
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Repair/replace the wiring harness.
After repair procedure, go to Step 10.
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No
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Go to the next step.
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8
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INSPECT BRAKE SWITCH CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between the following connector terminals.
• 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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Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to Step 10.
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9
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INSPECT PCM
• Reconnect the PCM connector.
• Measure the voltage at PCM connector terminal 1AF.
(See PCM INSPECTION [L8, LF, L5].)
• Is the voltage 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 PCM.
After replacement, go to the next step.
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10
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VERIFY DTC
• Install the STOP 5 A fuse.
• Reconnect the disconnected connectors and the negative battery cable.
• Clear DTC using the M-MDS.
• Verify DTC using the M-MDS.
• Is the same DTC present?
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Yes
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Repeat the inspection from Step 1.
If the malfunction recurs, replace the keyless control module.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
Go to the next step.
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No
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Go to the next step.
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11
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VERIFY THAT NO OTHER DTCs ARE PRESENT
• Are there other DTCs output?
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Yes
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Perform the corresponding DTC inspection.
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No
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DTC troubleshooting completed.
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