DTC B1016: Shift Lock Circuit

DTC detecting condition:

Shift lock circuit is open, or shorted to power or ground.

Trouble symptom:

Shift lock does not be released or remain locked.

Wiring diagram:

Shift lock control system Ref. to WIRING SYSTEM (IMPREZA MODEL)>SHIFT LOCK CONTROL SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>SHIFT LOCK CONTROL SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>SHIFT LOCK CONTROL SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to BODY CONTROL (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .

CHECK DTC .
1. Turn the ignition switch to ON.
2. Maintain the shift lever in P range for five seconds or more.
3. Maintain the brake pedal depressed for one second or more.
4. Read the DTC of [Body Control] using the Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
  Is DTC B1016 displayed? (Current malfunction)
  
  Yes : Go to 2.
  
  No : Even if DTC is displayed, the circuit has returned to a normal condition at this time.
  
  Reproduce the failure, and then perform the diagnosis again.
  
  NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
CHECK FUSE .
1. Turn the ignition switch to OFF.
2. Check the fuse.
  Is the check result OK?
  
  Yes : Go to 3.
  
  No : Replace the defective fuse.
CHECK HARNESS (OPEN CIRCUIT) .
1. Disconnect the shift lock solenoid connector.
2. Using the tester, measure the resistance between terminals.
  Connector & terminal
  
  (i44) No. 4 - Chassis ground:
  
  Is the resistance less than 10 Ω?
  
  Yes : Go to 4.
  
  No : Repair or replace the open circuit of harness.
CHECK SHIFT LOCK SOLENOID .
Using a tester, measure the resistance between shift lock solenoid terminals.

Terminals

Shift lock solenoid

No. 3 - No. 4:

Is the resistance between 27.6 - 30.5 Ω?

Yes : Go to 5.

No : Replace the shift lock solenoid. Ref. to CONTROL SYSTEMS>AT SHIFT LOCK SOLENOID AND "P" RANGE SWITCH>REMOVAL
CHECK HARNESS (OPEN CIRCUIT) .
Use a tester to measure the resistance between harness terminals.

Connector & terminal

(i44) No. 3 - (i84) No. 3:

NOTE: If body integrated unit and shift lock connector are not disconnected, disconnect them first and then perform measurement.

Is the resistance less than 10 Ω?

Yes : Go to 6.

No : Repair or replace the open circuit of harness.
CHECK HARNESS (GROUND SHORT CIRCUIT) .
Measure the resistance between body integrated unit and chassis ground using a tester.

Connector & terminal

(i84) No. 3 - Chassis ground:

Is the resistance 1 MΩ or more?

Yes : Go to 7.

No : Repair or replace the ground short circuit of the harness.
CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY) .
Measure the voltage between body integrated unit and chassis ground using a tester

Connector & terminal

(i84) No. 3 (+) - Chassis ground (-):

Is the voltage less than 1 V?

Yes : Go to 8.

No : Repair or replace the ground short circuit of the harness.
CHECK CONNECTOR .
Disconnect the body integrated unit connector and shift lock connector.

Is there poor contact of connector terminal?

Yes : Repair or replace the poor contact of terminal.

No : Go to 9.
CHECK DTC .
1. Connect all the disconnected connectors.
2. Turn the ignition switch to ON.
3. Maintain the shift lever in P range and the brake pedal depressed for five seconds or more.
4. Read the DTC of [Body Control] using the Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
  Is DTC B1016 displayed? (Current malfunction)
  
  Yes : Replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .
  
  No : Even if DTC is displayed, the circuit has returned to a normal condition at this time.
  
  Reproduce the failure, and then perform the diagnosis again.
  
  NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.