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1
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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2
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INSPECT CLOCK SPRING CONNECTOR CONDITION
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Warning
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• Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the air bag system service warnings and cautions before handling the air bag system components.
• Turn the ignition switch off.
• Disconnect the clock spring connector.
• Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the connector or terminals, then go to Step 9.
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No
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Go to the next step.
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3
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INSPECT CLOCK SPRING
• Inspect the clock spring.
• Is there any malfunction?
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Yes
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Replace the clock spring, then go to Step 9.
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No
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Go to the next step.
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4
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INSPECT CRUISE CONTROL SWITCH
• Inspect the cruise control switch.
• Is there any malfunction?
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Yes
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Replace the steering switch, then go to Step 9.
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No
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Go to the next step.
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5
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INSPECT CRUISE CONTROL SWITCH CIRCUIT FOR SHORT TO GROUND
• Clock spring connector is disconnected.
• Inspect for continuity between clock spring terminal 2B (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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If the short to ground circuit could be detected:
• Repair or replace the wiring harness for a possible short to ground.
If the short to ground circuit could not be detected:
• Replace the PCM (short to ground in PCM internal circuit).
Go to Step 9.
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No
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Go to the next step.
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6
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INSPECT PCM CONNECTOR CONDITION
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the connector or terminals, then go to Step 9.
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No
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Go to the next step.
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7
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INSPECT CRUISE CONTROL SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY
• Clock spring and PCM connectors are disconnected.
• Turn the ignition switch to the ON position (engine off).
• Measure the voltage between the following terminals (wiring harness-side) and body ground:
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― Clock spring terminal 2B
― Clock spring terminal 2C
• Is there any voltage?
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Yes
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Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.
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No
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Go to the next step.
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8
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INSPECT CRUISE CONTROL SWITCH CIRCUIT FOR OPEN CIRCUIT
• Clock spring and PCM connectors are disconnected.
• Turn the ignition switch off.
• Inspect for continuity between the following terminals (wiring harness-side):
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― Clock spring terminal 2B—PCM terminal 1N
― Clock spring terminal 2C—PCM terminal 1L
• 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 or replace the wiring harness for a possible open circuit, then go to the next step.
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9
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VERIFY TROUBLESHOOTING OF DTC P0579:00 HAS BEEN COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Drive the vehicle using cruise control for 2 min or more.
• Perform the DTC Reading Procedure.
• 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 PCM.
Go to the next step.
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No
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Go to the next step.
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10
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• 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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Troubleshooting completed.
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