Transfer Control Device
Transfer Control DeviceCONSULT-II REFERENCE VALUE IN DATA MONITOR MODE:
TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE:
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.
^ 10A fuse (No. 59, located in the fuse and relay block).
^ Harness for short or open between battery and transfer shut off relay 1 harness connector E46 terminal 5.
^ Harness for short or open between transfer control unit harness connector E143 terminal 27 and transfer shut off relay 1 harness connector E46 terminal 3.
^ Harness for short or open between ignition switch and transfer shut off relay 1 harness connector E46 terminal 2.
^ Harness for short or open between transfer shut off relay 1 harness connector E46 terminal 1 and ground.
^ Harness for short or open between ignition switch and transfer control unit harness connector E142 terminal 25.
^ Battery and ignition switch. Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT". Power Supply Routing Circuit Schematic
^ Transfer shut off relay 1. Refer to TF-43, "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 E143 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 ground.
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 2 harness connector E47 terminal 1.
^ Harness for short or open between transfer shut off relay 2 harness connector E47 terminal 2 and transfer control unit harness connector E143 terminal 40.
^ Transfer shut off relay 2. Refer to TF-43, "COMPONENT INSPECTION". Power Supply Circuit For Transfer Control Unit
4. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-29, "Transfer Control Unit Input/Output Signal Reference Values". Pinout Values and Diagnostic Parameters
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.
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-37, "SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II)". Without Scan Tool
Refer to TF-39, "ERASE SELF-DIAGNOSIS". 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.