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P1801, P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT DLN-205 < COMPONENT DIAGNOSIS > [TRANSFER: TX15B] C E F G H I J K L M A B DLN N O P 4. Turn ignition switch “ON”. (Do not start engine.) 5. Check voltage between transfer control unit harness connector terminals and ground. Is there voltage? YES >> GO TO 2. NO >> Check the following. If any items are damaged, repair or replace damaged parts. • 40A fuse (No. j , located in the fuse and fusible link box). • 10A fuses (No. 21, located in the fuse block (J/B) and Nos. 60 and 61 located in the fuse and relay box). • Harness for short or open between battery and transfer control unit harness connector M165 terminal 19. • Harness for short or open between battery and transfer shut off relay 2 harness connector E157 terminal 1 and 3. • Harness for short or open between battery and transfer shut off relay 1 harness connector E156 terminal 3. • Harness for short or open between ignition switch and transfer control unit harness connector M165 terminal 25. • Harness for short or open between ignition switch and transfer shut off relay 1 harness connec- tor E156 terminal 1. • Harness for short or open between transfer shut off relay 2 harness connector E157 terminal 5 and transfer control unit harness connector M166 terminals 44, 45. • Harness for short or open between transfer shut off relay 1 harness connector E156 terminal 5 and transfer control unit harness connector M166 terminals 44, 45. • Harness for short or open between transfer shut off relay 2 harness connector E157 terminal 2 and transfer control unit harness connector M166 terminal 40. • Harness for open between transfer shut off relay 1 harness connector E156 terminal 2 and ground. • Battery and ignition switch. • Transfer shut off relay 1, 2. Refer to DLN-206, "Component Inspection" . 2. CHECK GROUND CIRCUIT 1. Turn ignition switch “OFF”. 2. Disconnect transfer control unit harness connector. 3. Check continuity between transfer control unit harness connec- tor M165 terminals 6 and 18, and M166 terminal 32 and ground. Also check harness for short to power. Do you have continuity? YES >> GO TO 3. NO >> Repair open circuit or short to power in harness or con- nectors. 3. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to Are the inspection results normal? YES >> GO TO 4. Connector Terminal Voltage (Approx.) M165 19 - Ground Battery voltage 25 - Ground M166 40 - Ground 44 - Ground 45 - Ground SDIA3361E Continuity should exist. SDIA3362E 2010 Pathfinder |