Operation CHARM: Car repair manuals for everyone.
Home >> Infiniti Truck >> 2007 >> QX56 AWD V8-5.6L (VK56DE) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P1819 >> Transfer Control Device

Transfer Control Device

Transfer Control Device

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE:




TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE:





CAUTION: When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.

DIAGNOSTIC PROCEDURE
1. CHECK POWER SUPPLY
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Connect transfer control unit harness connector.








3. Check voltage between transfer control unit harness connector terminal and ground.








4. Turn ignition switch "ON". (Do not start engine.)
5. Check voltage between transfer control unit harness connector terminals and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
^ 10A fuse No. 26 located in the fuse and fusible link box. Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT".
^ Harness for short or open between battery and transfer shut off relay harness connector E69 terminal.
^ Harness for short or open between transfer shut off relay harness connector E69 terminal 2 and transfer control unit harness connector E143 terminal 30.
^ Harness for short or open between battery and transfer shut off relay harness connector E69 terminal 3.
^ Harness for short or open between transfer shut off relay harness connector E69 terminal 5 and transfer control unit harness connector E142 terminal 22.
^ Transfer shut off relay. Refer to TF-56, "COMPONENT INSPECTION". Power Supply Circuit For Transfer Control Unit

2. CHECK GROUND CIRCUIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.





3. Check continuity between transfer control unit harness connector E142 terminals 3, 6, E143 terminal 45 and ground.
Continuity should exist.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.

3. CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay.








3. Check voltage between transfer shift high relay harness connector E46 terminal 5 (A), transfer shift low relay harness connector E47 terminal 5 (B) and ground.








4. Turn ignition switch "ON". (Do not start engine.)
5. Check voltage between transfer shift high relay harness connector E46 terminal 5 (A), transfer shift low relay harness connector E47 terminal 5 (B) and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
^ 20A fuse No. 57 located in the fuse and relay box. Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT".
^ Harness for short or open between battery, transfer shift high relay harness connector E46 terminal 5 and transfer shift low relay harness connector E47 terminal 5.

4. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and transfer control device (actuator motor) harness connector.
3. Remove transfer shift high relay and transfer shift low relay.
4. Check continuity between the following terminals.





- Transfer control unit harness connector E143 terminal 33 (A) and transfer shift high relay harness connector E46 terminal 3 (B).
- Transfer control unit harness connector E143 terminal 42 (A) and transfer shift low relay harness connector E47 terminal 3 (C).
Continuity should exist.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.

5. CHECK TRANSFER SHIFT RELAY GROUND CIRCUIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay.





3. Check continuity between transfer shift high relay harness connector E46 terminals 2, 4 (A), transfer shift low relay harness connector E47 terminals 2, 4 (B) and ground.
Continuity should exist.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.

6. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-35, "Transfer Control Unit Input/Output Signal Reference Values". Transfer Control Unit Input/Output Signal Reference Values
OK or NG
OK-1 >> With CONSULT-II: GO TO 7.
OK-2 >> Without CONSULT-II: GO TO 8.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

7. PERFORM SELF-DIAGNOSIS (WITH CONSULT-II)

With CONSULT-II
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "ALL MODE AWD/4WD" with CONSULT-II.
3. Touch "ERASE".
4. Turn ignition switch "OFF" and wait at least 10 seconds.
5. Perform the self-diagnosis again.
Is the "SHIFT ACT CIR [P1819]" displayed?
YES >> Replace transfer control unit.
NO >> Inspection End.

8. PERFORM SELF-DIAGNOSIS (WITHOUT CONSULT-II)

Without CONSULT-II
1. Perform the self-diagnosis and then erase self-diagnostic results. Refer to TF-49, "SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II)" and TF-52, "ERASE SELF-DIAGNOSIS".
Self-Diagnostic Procedure (Without Consult-II)
Without Scan Tool
2. Perform the self-diagnosis again.
Do the self-diagnostic results indicate transfer control device?
YES >> Replace transfer control unit.
NO >> Inspection End.



pro multis · About Operation CHARM