DTC P1887

id030200800300

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 | • 4WD solenoid malfunction • 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 • ENG B+ (10A) fuse malfunction • Open circuit or short to GND in harness between battery and 4WD CM terminal K • Open or short circuit in 4WD CM internal circuit • 4WD CM malfunction • Poor connection of connectors (female terminals)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT 4WD SOLENOID TO 4WD CM (POWER SUPPLY CIRCUIT) FOR OPEN CIRCUIT • Disconnect the 4WD CM connector. • Disconnect the 4WD solenoid connector. • Inspect for continuity between the 4WD CM terminal O (harness-side) and the 4WD solenoid terminal B (harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the harness for open circuit between the 4WD CM and the 4WD solenoid, then go to Step 7.
2 | INSPECT 4WD SOLENOID TO 4WD CM (POWER SUPPLY CIRCUIT) FOR SHORT TO GROUND • Inspect for continuity between the 4WD CM terminal O (harness-side) and ground. • Is there continuity? | Yes | Repair or replace the harness for short to ground between the 4WD CM and the 4WD solenoid, then go to Step 7.
No | Go to the next step.
3 | INSPECT 4WD SOLENOID TO 4WD CM (GROUND CIRCUIT) FOR OPEN CIRCUIT • Inspect for continuity between the 4WD CM terminal P (harness-side) and the 4WD solenoid terminal A (harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the harness for open circuit between the 4WD CM and the 4WD solenoid, then go to Step 7.
4 | INSPECT 4WD SOLENOID TO 4WD CM (GROUND CIRCUIT) FOR SHORT TO GROUND • Inspect for continuity between the 4WD CM terminal P (harness-side) and ground. • Is there continuity? | Yes | Repair or replace the harness for short to ground between the 4WD CM and the 4WD solenoid, then go to Step 7.
No | Go to the next step.
5 | INSPECT 4WD SOLENOID CONDITION • Inspect the 4WD solenoid. (See 4WD SOLENOID INSPECTION.) • Is it normal? | Yes | Go to the next step.
No | Replace the coupling component, then go to Step 7. (See COUPLING COMPONENT REMOVAL/INSTALLATION.) (See COUPLING COMPONENT DISASSEMBLY.) (See COUPLING COMPONENT ASSEMBLY.)
6 | INSPECT FUSE CONDITION • Is the ENG B+ (10A) fuse normal? | Yes | Go to the next step.
No | Replace the fuse, then go to Step 9.
7 | INSPECT 4WD CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Measure voltage between the 4WD CM terminal K (harness-side) and ground. • Is voltage B+? | Yes | Go to the next step.
No | Repair or replace the harness for open circuit between the 4WD CM and the battery, then go to next step.
8 | INSPECT 4WD CM GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between the 4WD CM terminal N (harness-side) and ground. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the harness for open circuit between the 4WD CM and ground, then go to next step.
9 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from memory. (See ELECTRONIC 4WD CONTROL SYSTEM ON-BOARD DIAGNOSIS.) • Drive vehicle. • Is the same DTC present? | Yes | Replace the 4WD CM, then go to next step. (See 4WD CONTROL MODULE REMOVAL/INSTALLATION.)
No | Go to the next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Is there any other DTC present? | Yes | Go to applicable DTC inspection.
No | Troubleshooting completed.