Hybrid Mode Switch System

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 fRef. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>HYBRID ELECTRIC VEHICLE SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

INTERVIEW .
Ask the customer if "Mode Change/Not Available" was displayed on the combination meter when he/she operated Hybrid mode switch.

Was it displayed on the combination meter?

Yes:

Finish the diagnosis.

NOTE: If it was displayed, the mode switching condition was not satisfied.

No:

Go to 2.
CHECK LAN SYSTEM .
Inspect LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>BASIC DIAGNOSTIC PROCEDURE .

Is LAN system OK?

Yes:

Go to 3.

No:

Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>BASIC DIAGNOSTIC PROCEDURE .
CHECK DTC .
Using the Subaru Select Monitor, read all DTCs. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .

Are any DTCs displayed?

Yes:

Perform the diagnosis for the displayed DTCs.

No:

Go to 4.
CHECK DATA MONITOR (Hybrid mode switch) .
Using the Subaru Select Monitor, display the following items in the [Data Monitor] of [P-HEV Hybrid Powertrain Control]. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DATA MONITOR .
- HV/EV Mode Switch
Does the display change according to the Hybrid mode switch operation?

Yes:

Perform the diagnosis for combination meter and MFD. Ref. to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE . Ref. to MULTI-FUNCTION DISPLAY (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

No:

Go to 5.
CHECK THE Hybrid mode switch UNIT .
1. Remove the Hybrid mode switch. Ref. to HYBRID ELECTRIC VEHICLE>SWITCHES AND HARNESS .
2. Using a tester, measure the resistance between Hybrid mode switch terminals.
  Connector and terminal
  
  (AD95) No. 1 - (AD95) No. 4:
  
  Is the resistance as follows?
  
  When Hybrid mode switch is pressed: Less than 50 Ω
  
  When Hybrid mode switch is not operated: 10 kΩ or more
  
  Yes:
  
  Go to 6.
  
  No:
  
  Replace Hybrid mode switch. Ref. to HYBRID ELECTRIC VEHICLE>SWITCHES AND HARNESS .
CHECK Wire harness AND CONNECTOR (Hybrid mode switch - CHASSIS GROUND) (OPEN CIRCUIT) .
Using a tester, measure the resistance between Hybrid mode switch connector and chassis ground.

Connector and terminal

(AD95) No. 4 - Chassis ground:

Is the resistance less than 1 Ω?

Yes:

Go to 7.

No:

Repair or replace the Wire harness between Hybrid mode switch connector and chassis ground.
CHECK Wire harness AND CONNECTOR (Hybrid vehicle control ECU assembly - Hybrid mode switch) (OPEN CIRCUIT) .
1. Disconnect Hybrid vehicle control ECU assembly connector (i370).
2. Using a tester, measure the resistance between Hybrid mode switch connector and Hybrid vehicle control ECU assembly connector.
  Connector and terminal
  
  (i370) No. 15 - (AD95) No. 1:
  
  Is the resistance less than 1 Ω?
  
  Yes:
  
  Go to 8.
  
  No:
  
  Repair or replace the Wire harness between Hybrid mode switch connector and Hybrid vehicle control ECU assembly connector.
CHECK Wire harness AND CONNECTOR (Hybrid vehicle control ECU assembly - Hybrid mode switch) (SHORT TO GROUND OR LINE-TO-LINE SHORT) .
Using a tester, measure the resistance between Hybrid vehicle control ECU assembly connector and chassis ground.

Connector and terminal

(i370) No. 15 - Chassis ground:

Is the resistance 10 kΩ or more?

Yes:

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

No:

Repair or replace the Wire harness between Hybrid mode switch connector and Hybrid vehicle control ECU assembly connector.