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>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 POWER SUPPLY CIRCUIT .
1. Turn the ignition switch to OFF.
2. Measure the voltage between body integrated unit and chassis ground using tester.
  Connector and terminal
  
  (B72) No. 4 (+) - Chassis ground (-):
Is the voltage 6 V or more?

Yes: Go to 3 .

No: Check the fuse and harness.
CHECK HARNESS (OPEN CIRCUIT) .
1. Turn the ignition switch to OFF.
2. Disconnect the shift lock solenoid connector.
3. Using a tester, measure the resistance between the shift lock solenoid connector and chassis ground.
  Connector and terminal
  
  (i136) 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 27.6 - 30.5 Ω?

Yes: Go to 5 .

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

Connector and terminal

(i136) No. 3 - (i81) 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 and terminal

(i81) 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 and terminal

(i81) 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 .
1. Turn the ignition switch to OFF.
2. 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 BODY CONTROL/COMMUNICATION SYSTEM>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.