Diagnosis Procedure

1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (connector side and harness side).
   • Harness connector M31
   • Harness connector E152

Is the inspection result normal?

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GO TO 2.

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Repair the terminal and connector.

1. Disconnect the following harness connectors.
   • Active noise control unit
   • Harness connectors M31 and E152
2. Check the continuity between the active noise control unit harness connector and the harness connector.

   Active noise control unit harness connector		Harness connector		Continuity
   Connector No.	Terminal No.	Connector No.	Terminal No.
   M87	18	M31	56J	Existed
   	2		66J	Existed

Is the inspection result normal?

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GO TO 3.

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Repair the main line between the active noise control unit and the harness connector M31.

1. Disconnect the connector of EPS control unit.
2. Check the continuity between the harness connector and the EPS control unit harness connector.

   Harness connector		EPS control unit harness connector		Continuity
   Connector No.	Terminal No.	Connector No.	Terminal No.
   E152	56J	E11	8	Existed
   	66J		7	Existed

Is the inspection result normal?

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Check CAN system type decision again.

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Error was detected in the main line between the active noise control unit and the EPS control unit

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Repair the main line between the harness connector E152 and EPS control unit