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

id0302a6200500

DTC P1887:11
System wiring
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 power supply circuit 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
•  Refer to “Fail-safe function table”. (See DTC TABLE [ELECTRONIC 4WD CONTROL SYSTEM].)
POSSIBLE CAUSE
•  4WD solenoid malfunction
•  Open or short to ground circuit in wiring harness between 4WD control module terminal O and 4WD solenoid terminal A
•  Open or short to ground circuit in wiring harness between 4WD control module terminal P and 4WD solenoid terminal B
•  Open or short to ground circuit in wiring harness between battery and 4WD control module terminal K
•  4WD control module malfunction
•  Fuse (AT 15A) malfunction
•  Poor connection at each connector

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
INSPECT 4WD SOLENOID
•  Inspect the 4WD solenoid.
•  Is there any malfunction?
Yes
Replace the coupling component, then go to Step 8.
(See COUPLING COMPONENT REMOVAL/INSTALLATION.)
No
Go to the next step.
2
INSPECT 4WD SOLENOID POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition OFF.
•  Disconnect the 4WD control module connector.
•  Disconnect the 4WD solenoid connector.
•  Inspect for continuity between 4WD control module terminal O (wiring harness-side) and 4WD solenoid terminal A (wiring harness-side).
•  Is there continuity?
Yes
Go to the next Step.
No
Refer to the wiring diagram and verify whether or not 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 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
•  Disconnect the 4WD control module connector.
•  Inspect for continuity between 4WD control module terminal O (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not 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 GROUND CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition OFF.
•  Disconnect the 4WD control module connector.
•  Disconnect the 4WD solenoid connector.
•  Inspect for continuity between 4WD control module terminal P (wiring harness-side) and 4WD solenoid terminal B (wiring harness-side).
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not 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 GROUND CIRCUIT FOR SHORT TO GROUND
•  Disconnect the 4WD control module connector.
•  Inspect for continuity between 4WD control module terminal P (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not 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 SOLENOID POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
•  Measure the voltage between 4WD control module terminal K (wiring harness-side) and body ground.
•  Is the voltage B+?
Yes
Replace the 4WD control module, then go to Step 8.
(See 4WD CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
7
INSPECT FUSE CONDITION
•  Is the fuse (AT 15A) normal?
Yes
Go to the next step.
No
•  If the fuse is blown:
?  Refer to the wiring diagram and verify whether or not there is a common connector between fuse and 4WD control module terminal K.
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.
•  Replace the fuse.
•  If the fuse is damaged:
?  Replace the fuse.
Go to the next step.
8
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Using the M-MDS, clear the DTC from the 4WD control module.
•  Drive the vehicle.
•  Using the M-MDS, perform the 4WD control module DTC inspection.
•  Is the same DTC present?
Yes
Replace the 4WD control module, then go to the next step.
(See 4WD CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
9
VERIFY NO DTC IS PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [ELECTRONIC 4WD CONTROL SYSTEM].)
No
DTC troubleshooting completed.