DTC P1887 [L3 Turbo]

id0302a5800300

DTC | P1887 | 4WD solenoid circuit
DETECTION CONDITION | • Current detection circuit in 4WD CM detects current above specification for more than specified period. • 4WD CM detects that 4WD solenoid control signal differs from current detected at current detection circuit for more than specified period. • Relay voltage detection circuit detects that voltage does not concur with relay ON/OFF signal for more than specified period.
POSSIBLE CAUSE | • Open circuit or short to GND in harness between battery and 4WD CM terminal K • Open circuit or short to GND between 4WD CM terminal O and 4WD solenoid terminal B • Open circuit or short to GND between 4WD CM terminal P and 4WD solenoid terminal A • Open circuit between 4WD CM terminal N and body GND • Open or short circuit in 4WD CM internal circuit • ENG+B (10A) fuse malfunction • 4WD solenoid malfunction • 4WD CM malfunction • Poor connection of connectors (female terminals)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT 4WD SOLENOID CONDITION • Turn ignition key to OFF. • Disconnect 4WD solenoid connector. • Inspect 4WD solenoid. (See 4WD SOLENOID INSPECTION [L3 Turbo]) • Is it okay? | Yes | Go to next step.
No | Replace 4WD solenoid, then go to Step 7.
2 | INSPECT 4WD SOLENOID TO 4WD CM (POWER SUPPLY CIRCUIT) FOR OPEN CIRCUIT • Disconnect 4WD CM connector. • Inspect for continuity between 4WD CM terminal O and 4WD solenoid terminal B. • Is there continuity? | Yes | Go to next step.
No | Repair or replace harness for open circuit between 4WD CM and 4WD solenoid, then go to Step 7.
3 | INSPECT 4WD SOLENOID TO 4WD CM (POWER SUPPLY CIRCUIT) FOR SHORT TO GROUND • Inspect for continuity between 4WD CM terminal O and ground. • Is there continuity? | Yes | Repair or replace harness for short to ground between 4WD CM and 4WD solenoid, then go to Step 7.
No | Go to next step.
4 | INSPECT 4WD SOLENOID TO 4WD CM (GROUND CIRCUIT) FOR OPEN CIRCUIT • Inspect for continuity between 4WD CM terminal P and 4WD solenoid terminal A. • Is there continuity? | Yes | Go to next step.
No | Repair or replace harness for open circuit between 4WD CM and 4WD solenoid, then go to Step 7.
5 | INSPECT 4WD SOLENOID TO 4WD CM (GROUND CIRCUIT) FOR SHORT TO GROUND • Inspect for continuity between 4WD CM terminal P and ground. • Is there continuity? | Yes | Repair or replace harness for short to ground between 4WD CM and 4WD solenoid, then go to Step 7.
No | Go to next step.
6 | INSPECT 4WD CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Measure voltage between 4WD CM terminal K and ground. • Is voltage B+? | Yes | Replace 4WD CM, then go to Step 9. (See 4WD CONTROL MODULE REMOVAL/INSTALLATION [L3 Turbo].)
No | Go to next step.
7 | INSPECT FUSE CONDITION • Turn ignition key to OFF. • Is ENG+B fuse (10A) okay? | Yes | Repair or replace harness for open circuit between battery and 4WD CM, then go to next step.
No | Replace fuse, then go to next step.
8 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from memory. (See ELECTRONIC 4WD CONTROL SYSTEM ON-BOARD DIAGNOSIS [L3 Turbo].) • Drive vehicle. • Is the same DTC present? | Yes | Replace 4WD CM, then go to next step. (See 4WD CONTROL MODULE REMOVAL/INSTALLATION [L3 Turbo].)
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.