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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Parking Brake System (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC C0222 Hill Hold Switch Circuit >> Diagnostic Procedure

Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK HILL HOLD SWITCH POWER SUPPLY. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from hill hold switch.
  3. Turn the ignition switch to ON.
  4. Measure the voltage between hill hold switch connector and chassis ground.

    Connector & terminal 

    (i156) No. 1 (+) - Chassis ground (-): 

 Is the voltage 10 - 15 V? Go to step 2  . Repair the power supply circuit of hill hold switch.
2 CHECK HARNESS. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connectors from the electronic parking brake CM.
  3. Measure the resistance of harness between hill hold switch and electronic parking brake CM connector.

    Connector & terminal 

    (i156) No. 4 - (R355) No. 2: 

 Is the resistance less than 1 Ω? Go to step 3  . Repair the harness and connector between hill hold switch and electronic parking brake CM connector.
3 CHECK HARNESS. 
Measure the resistance of harness between hill hold switch connector and chassis ground.
Connector & terminal 
(i156) No. 4 - Chassis ground: 		 Is the resistance less than 1 MΩ? Go to step 4  . Repair ground short of harness between hill hold switch and electronic parking brake CM connector.
4 CHECK HARNESS. 
Measure the voltage between hill hold switch connector and chassis ground.
Connector & terminal 
(i156) No. 4 (+) - Chassis ground (-): 		 Is the voltage less than 1 V? Go to step 5  . Repair short to power supply of harness between hill hold switch and electronic parking brake CM connector.
5 CHECK HILL HOLD SWITCH. 
Check the hill hold switch. < Refer to HILL HOLD SWITCH , INSPECTION, Parking Brake Switch. >		 Is the hill hold switch normal? Go to step 6  . Replace the hill hold switch. < Refer to REMOVAL , Parking Brake Switch. >
6 CHECK ELECTRONIC PARKING BRAKE CM. 
  1. Connect all connectors.
  2. Clear the memory. < Refer to CLEAR MEMORY MODE . >
  3. Perform the Inspection Mode. < Refer to INSPECTION MODE . >
  4. Read the DTC.
 Is the same DTC displayed? Replace the electronic parking brake CM. < Refer to PARKING BRAKE ACTUATOR . > Go to step 7  .
7 CHECK OTHER DTC DETECTION.  Is any other DTC displayed? Perform the diagnosis according to DTC. It results from a temporary poor contact interference.
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