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C1209 MODE SW DLN-47 < DTC/CIRCUIT DIAGNOSIS > [TRANSFER: TY21C] C E F G H I J K L M A B DLN N O P C1209 MODE SW DTC Description INFOID:0000000010991989 DTC DETECTION LOGIC POSSIBLE CAUSE • Malfunction of 4WD mode switch FAIL-SAFE 4WD control changes to front-wheel drive immediately, then 4WD control stops, and the vehicle becomes DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and >> GO TO 2. 2. DTC REPRODUCTION PROCEDURE With CONSULT 1. Start the engine. CAUTION: Stop the vehicle. 2. Operate 4WD mode switch to each position. 3. Perform self-diagnosis for “ALL MODE AWD/4WD”. Is DTC “C1209” detected? YES >> Proceed to diagnosis procedure. Refer to NO-1 >> To check malfunction symptom before repair: Refer to GI-44, "Intermittent Incident" NO-2 >> Confirmation after repair: INSPECTION END Diagnosis Procedure INFOID:0000000010991990 1. CHECK 4WD MODE SWITCH Check 4WD mode switch. Refer to DLN-49, "Component Inspection" Is the inspection result normal? YES >> GO TO 2. NO >> Replace 4WD mode switch. Refer to DLN-77, "Removal and Installation" . 2. CHECK 4WD MODE SWITCH SIGNAL CIRCUIT 1. Disconnect 4WD control unit harness connector. 2. Check the continuity between 4WD control unit harness connector and 4WD mode switch harness con- DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition C1209 MODE SW More than two switch inputs are simultaneously detected |