Vehicle Does Not Enter AWD Mode Even Though AWD Warning Lamp Turned to OFF

TROUBLE DIAGNOSIS FOR SYMPTOMS


Vehicle Does Not Enter AWD Mode Even Though AWD Warning Lamp Turned to OFF


DIAGNOSTIC PROCEDURE
1.CHECK AWD WARNING LAMP
Turn ignition switch "ON". (Do not start engine.)
Does AWD warning lamp turn on?
YES - GO TO 2.
NO - Go to AWD Warning Lamp Does Not Turn ON When the Ignition Switch Is Turned to ON.
2.CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to Scan Tool Testing and Procedures.
Is the "CAN COMM CIRCUIT [U1000]" displayed?
YES - Perform trouble diagnosis for CAN communication line. Refer to CAN Communication Line.
NO - GO TO 3.
3.CHECK AWD SOLENOID
Check AWD solenoid. Refer to C1204.
OK or NG
OK - GO TO 4.
NG - Replace electric controlled coupling for malfunction of AWD solenoid. Refer to Overhaul.
4.CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to Pinout Values and Diagnostic Parameters.
OK or NG
OK - GO TO 5.
NG - Check AWD control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
5.SYMPTOM CHECK
Check again.
OK or NG
OK INSPECTION END
NG - Replace electric controlled coupling for mechanical malfunction (mechanical engagement of clutch is not possible.). Refer to Overhaul.