DTC P1887
id030200800300
DTC
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P1887
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4WD solenoid circuit
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DETECTION CONDITION
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• 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.
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POSSIBLE CAUSE
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• 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)
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Diagnostic procedure
STEP |
INSPECTION |
ACTION |
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1
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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?
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Yes
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Go to the next step.
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No
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Repair or replace the harness for open circuit between the 4WD CM and the 4WD solenoid, then go to Step 7.
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2
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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?
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Yes
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Repair or replace the harness for short to ground between the 4WD CM and the 4WD solenoid, then go to Step 7.
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No
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Go to the next step.
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3
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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?
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Yes
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Go to the next step.
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No
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Repair or replace the harness for open circuit between the 4WD CM and the 4WD solenoid, then go to Step 7.
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4
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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?
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Yes
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Repair or replace the harness for short to ground between the 4WD CM and the 4WD solenoid, then go to Step 7.
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No
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Go to the next step.
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5
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INSPECT 4WD SOLENOID CONDITION
• Inspect the 4WD solenoid.
(See 4WD SOLENOID INSPECTION)
• Is it normal?
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Yes
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Go to the next step.
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No
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Replace the coupling component, then go to Step 7.
(See COUPLING COMPONENT ASSEMBLY.)
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6
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INSPECT FUSE CONDITION
• Is the ENG B+ (10A) fuse normal?
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Yes
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Go to the next step.
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No
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Replace the fuse, then go to Step 9.
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7
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INSPECT 4WD CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Measure voltage between the 4WD CM terminal K (harness-side) and ground.
• Is voltage B+?
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Yes
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Go to the next step.
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No
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Repair or replace the harness for open circuit between the 4WD CM and the battery, then go to next step.
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8
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INSPECT 4WD CM GROUND CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between the 4WD CM terminal N (harness-side) and ground.
• Is there continuity?
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Yes
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Go to the next step.
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No
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Repair or replace the harness for open circuit between the 4WD CM and ground, then go to next step.
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9
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VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory.
• Drive vehicle.
• Is the same DTC present?
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Yes
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Replace the 4WD CM, then go to next step.
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No
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Go to the next step.
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10
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VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
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Yes
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Go to applicable DTC inspection.
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No
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Troubleshooting completed.
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