DTC P1887:11/P1887:12/P1887:13/P1887:14 [ELECTRONIC 4WD CONTROL SYSTEM]

id0302a6200500

DTC P1887:11
4WD solenoid circuit
DTC P1887:12
DTC P1887:13
DTC P1887:14
DETECTION CONDITION
•  P1887:11
―  Short circuit to ground is detected in 4WD solenoid circuit
•  P1887:12
―  Short to battery is detected in 4WD solenoid circuit
•  P1887:13
―  Open circuit is detected in 4WD solenoid circuit
•  P1887:14
―  Open circuit or short to ground is detected in power supply circuit
FAIL-SAFE FUNCTION
•  Control disabled.
•  4WD warning indication: Indicated
POSSIBLE CAUSE
•  4WD solenoid malfunction
•  Open circuit or short to ground between 4WD CM terminal O and 4WD solenoid terminal A
•  Open circuit or short to ground between 4WD CM terminal P and 4WD solenoid terminal B
•  Open circuit or short to ground in harness between battery and 4WD CM terminal K
•  Open or short circuit in 4WD CM internal circuit
•  AT 15A fuse malfunction
•  4WD CM malfunction
•  Poor connection of connectors (female terminals)
SYSTEM WIRING DIAGRAM

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT 4WD SOLENOID CONDITION
•  Inspect 4WD solenoid.
•  Is 4WD solenoid normal?
Yes
Go to the next step.
No
Replace 4WD solenoid, then go to Step 8.
(See COUPLING COMPONENT REMOVAL/INSTALLATION.)
2
INSPECT 4WD SOLENOID TO 4WD CM (POWER SUPPLY CIRCUIT) FOR OPEN CIRCUIT
•  Switch the ignition off.
•  Disconnect 4WD CM connector.
•  Disconnect 4WD solenoid connector.
•  Inspect for continuity between 4WD CM terminal O and 4WD solenoid terminal A.
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify if there is a common connector between 4WD control module terminal O and 4WD solenoid terminal A.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 8.
3
INSPECT 4WD SOLENOID TO 4WD CM (POWER SUPPLY CIRCUIT) FOR SHORT TO GROUND
•  Verify that the 4WD CM connector and 4WD solenoid connector are disconnected.
•  Inspect for continuity between 4WD CM terminal O and body ground.
•  Is there continuity?
Yes
Refer to the wiring diagram and verify if there is a common connector between 4WD control module terminal O and 4WD solenoid terminal A.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 8.
No
Go to the next step.
4
INSPECT 4WD SOLENOID TO 4WD CM (GROUND CIRCUIT) FOR OPEN CIRCUIT
•  Verify that the 4WD CM connector and 4WD solenoid connector are disconnected.
•  Inspect for continuity between 4WD CM terminal P and 4WD solenoid terminal B.
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify if there is a common connector between 4WD control module terminal P and 4WD solenoid terminal B.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 8.
5
INSPECT 4WD SOLENOID TO 4WD CM (GROUND CIRCUIT) FOR SHORT TO GROUND
•  Verify that the 4WD CM connector and 4WD solenoid connector are disconnected.
•  Inspect for continuity between 4WD CM terminal P and body ground.
•  Is there continuity?
Yes
Refer to the wiring diagram and verify if there is a common connector between 4WD control module terminal P and 4WD solenoid terminal B.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 8.
No
Go to the next step.
6
INSPECT 4WD CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Verify that the 4WD CM connector and 4WD solenoid connector are disconnected.
•  Measure voltage between 4WD CM terminal K and body ground.
•  Is voltage B+?
Yes
Replace 4WD CM, then go to Step 8.
(See 4WD CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
7
INSPECT FUSE CONDITION
•  Switch the ignition off.
•  Is AT 15A fuse normal?
Yes
Repair or replace harness for open circuit between battery and 4WD CM, then go to the next step.
No
Replace fuse, then go to the next step.
8
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear DTC from memory.
•  Drive vehicle.
•  Using the M-MDS, perform the 4WD control module DTC inspection.
•  Is the same DTC present?
Yes
Replace 4WD CM, then go to the next step.
(See 4WD CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
•  Is there any other DTC present?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [ELECTRONIC 4WD CONTROL SYSTEM].)
No
Troubleshooting completed.