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. Disconnect 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.
^ 10 A fuse (No. 57. located in the fuse and relay box).
^ 40A fusible link (No. j, located in the fuse and fusible link box).
^ Harness for short or open between battery and transfer shut off relay 1 harness connector E156 terminal 3.
^ Harness for short or open between transfer control unit harness connector M153 terminal 27 and transfer shut off relay 1 harness connector E156 terminal 5.
^ Harness for short or open between ignition switch and transfer shut off relay 1 harness connector E156 terminal 1.
^ Harness for short or open between transfer shut off relay 1 harness connector E156 terminal 2 and ground.
^ Harness for short or open between ignition switch and transfer control unit harness connector M152 terminal 25.
^ Battery and ignition switch. Refer to "POWER SUPPLY ROUTING CIRCUIT".
^ Transfer shut off relay 1. Refer to "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 connector M153 terminal 32 and ground. Continuity should exist. Also check harness for short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to power in harness or connectors.

3. CHECK POWER SUPPLY SIGNAL
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 around.
4. Turn ignition switch "ON". (Do not start engine.)








5. Check voltage between transfer control unit harness connector terminal and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
^ Harness for short or open between battery and transfer shut off relay harness connector E157 terminal 1
^ Harness for short or open between transfer shut off relay 2 harness connector E157 terminal 2 and transfer control unit harness connector M153 terminal 40.
^ Transfer shut off relay 2. Refer to "COMPONENT INSPECTION".

4. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to "Transfer Control Unit Input/Output Signal Reference Values".
OK or NG
OK-1 >> With CONSULT-II: GO TO 5.
OK-2 >> Without CONSULT-II: GO TO 6.
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.

5. 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. Refer to "TRANSFER CONTROL UNIT".
NO >> Inspection End.

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

Without CONSULT-II
1. Perform the self-diagnosis and then erase self-diagnostic results. Refer to TF-46, "SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II)" [1][2][3]Diagnostic Trouble Code Descriptions and TF-49, "ERASE SELF-DIAGNOSIS". With Manufacturer's Scan Tool (Consult II)
2. Perform the self-diagnosis again.
Do the self-diagnostic results indicate transfer control device?
YES >> Replace transfer control unit. Refer to "TRANSFER CONTROL UNIT".
NO >> Inspection End.