Shut Down Signal Circuit: Notes

WARNING: This page is about a different variant/trim than selected.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .

Wiring diagram:

Hybrid system Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>HYBRID ELECTRIC VEHICLE SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CHECK Hybrid vehicle control ECU assembly .
1. Turn to IG ON.
2. Using a tester, measure the voltage between Hybrid vehicle control ECU assembly connector and chassis ground. (With the connector connected)
  Connector & terminal
  
  (B606) No. 25 (+) - (i369) No. 6 (-):
Is the voltage less than 4.5 V?

Yes : Shut Down Signal Circuit is normal.

No : Go to 2.
CHECK Wire harness AND CONNECTOR (Hybrid vehicle control ECU assembly - Inverter with converter assembly) (SHORT TO POWER SUPPLY) .
CAUTION: Make sure to wear insulated gloves and protective goggles during the work.
1. Check that the Service plug is disconnected. Ref. to HYBRID ELECTRIC VEHICLE>SERVICE PLUG .
2. Disconnect Inverter with converter assembly connector (B606).
3. Disconnect Hybrid vehicle control ECU assembly connector (HV23).
4. Connect the Battery (12V) ground terminal. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
5. Turn to IG ON.
6. Using a tester, measure the voltage between Hybrid vehicle control ECU assembly connector and chassis ground.
  Connector & terminal
  
  (B606) No. 25 (+) - Chassis ground (-):
Is the voltage less than 1 V?

Yes : Go to 3.

No : Repair or replace the Wire harness between Inverter with converter assembly connector and Hybrid vehicle control ECU assembly connector.
CHECK Wire harness AND CONNECTOR (Hybrid vehicle control ECU assembly - Inverter with converter assembly) (LINE-TO-LINE SHORT) .
CAUTION: Make sure to wear insulated gloves and protective goggles during the work.
1. Turn the ignition to OFF.
2. Disconnect the ground terminal of Battery (12V). Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
3. Disconnect Hybrid vehicle control ECU assembly connectors (i369) and (i370).
4. Using a tester, measure the resistance between terminals in Hybrid vehicle control ECU assembly connector, and between terminals in Inverter with converter assembly connector.
  Connector & terminal
  
  (HV23) No. 12 - (HV23) No. 1:
  
  (HV23) No. 12 - (HV23) No. 5:
  
  (B606) No. 25 - (i369) No. 4:
  
  (B606) No. 25 - (B606) No. 1:
  
  (B606) No. 25 - (i369) No. 3:
Is the resistance 10 kΩ or more?

Yes : Go to 4.

No : Repair or replace the Wire harness between Inverter with converter assembly connector and Hybrid vehicle control ECU assembly connector.
CHECK THE Inverter with converter assembly UNIT .
CAUTION: Make sure to wear insulated gloves and protective goggles during the work.

Using a tester, measure the resistance between Inverter with converter assembly terminals.

Connector & terminal

(HV23) No. 12 - (HV23) No. 1:

(HV23) No. 12 - (HV23) No. 5:

Is the resistance 10 kΩ or more?

Yes : Replace Hybrid vehicle control ECU assembly. Ref. to HYBRID ELECTRIC VEHICLE>HYBRID POWERTRAIN CONTROL MODULE .

No : Replace Inverter with converter assembly. Ref. to HYBRID ELECTRIC VEHICLE>INVERTER AND CONVERTER ASSEMBLY .