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 light: Illuminated
POSSIBLE CAUSE
•  4WD solenoid malfunction
•  Open circuit or short to ground between 4WD control module terminal O and 4WD solenoid terminal A
•  Open circuit or short to ground between 4WD control module terminal P and 4WD solenoid terminal B
•  Open circuit or short to ground in harness between battery and 4WD control module terminal K
•  Open circuit between 4WD control module terminal N and body ground
•  Open or short circuit in 4WD control module internal circuit
•  AT (15A) fuse malfunction
•  4WD control module malfunction
•  Poor connection of connectors (female terminals)
SYSTEM WIRING DIAGRAM

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT 4WD SOLENOID CONDITION
•  Switch the ignition to off.
•  Disconnect 4WD solenoid connector.
•  Inspect 4WD solenoid.
•  Is 4WD solenoid normal?
Yes
Go to next step.
No
Replace 4WD solenoid, then go to Step 8.
2
INSPECT 4WD SOLENOID TO 4WD CONTROL MODULE (POWER SUPPLY CIRCUIT) FOR OPEN CIRCUIT
•  Disconnect 4WD control module connector.
•  Inspect for continuity between 4WD control module terminal O and 4WD solenoid terminal A.
•  Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open circuit between 4WD control module and 4WD solenoid, then go to Step 8.
3
INSPECT 4WD SOLENOID TO 4WD CONTROL MODULE (POWER SUPPLY CIRCUIT) FOR SHORT TO GROUND
•  Inspect for continuity between 4WD control module terminal O and ground.
•  Is there continuity?
Yes
Repair or replace harness for short to ground between 4WD control module and 4WD solenoid, then go to Step 8.
No
Go to next step.
4
INSPECT 4WD SOLENOID TO 4WD CONTROL MODULE (GROUND CIRCUIT) FOR OPEN CIRCUIT
•  Inspect for continuity between 4WD control module terminal P and 4WD solenoid terminal B.
•  Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open circuit between 4WD control module and 4WD solenoid, then go to Step 8.
5
INSPECT 4WD SOLENOID TO 4WD CONTROL MODULE (GROUND CIRCUIT) FOR SHORT TO GROUND
•  Inspect for continuity between 4WD control module terminal P and ground.
•  Is there continuity?
Yes
Repair or replace harness for short to ground between 4WD control module and 4WD solenoid, then go to Step 8.
No
Go to next step.
6
INSPECT 4WD CONTROL MODULE POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
•  Measure voltage between 4WD control module terminal K and ground.
•  Is voltage B+?
Yes
Replace 4WD control module, then go to Step 9.
No
Go to next step.
7
INSPECT FUSE CONDITION
•  Switch the ignition to off.
•  Is AT (15A) fuse normal?
Yes
Repair or replace harness for open circuit between battery and 4WD control module, then go to 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 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 control module, then go to next step.
No
Go to next step.
9
VERIFY AFTER REPAIR PROCEDURE
•  Is there any other DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.