| 1 |
CHECK ATP SWITCH SIGNAL
- With SDT
- Start engine.
- Select "Data list" mode for "4WD" with SDT.
- Read out the value of "ATP SWITCH".
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- 2)
Without SDT
- Start engine.
- Check voltage between transfer control unit harness connector terminal and ground.
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Are the inspection results normal? |
GO TO 5. |
GO TO 2. |
| 2 |
CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ATP SWITCH
- Turn ignition switch "OFF". (Stay for at least 5 seconds.)
- Disconnect transfer control unit harness connector and the ATP switch harness connector.
- Check continuity between transfer control unit harness connector M152 terminal 23 and ATP switch harness connector F55 terminal 8.
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Continuity should exist.
Also check harness for short to ground and short to power.
Does continuity exist? |
GO TO 3. |
Repair or replace damaged parts. |
| 3 |
CHECK GROUND CIRCUIT
- Turn ignition switch "OFF". (Stay for at least 5 seconds.)
- Disconnect ATP switch harness connector.
- Check continuity between ATP switch harness connector F55 terminal 9 and ground.
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Continuity should exist.
Also check harness for short to power.
Does continuity exist? |
GO TO 4. |
Repair open circuit or short to power in harness or connectors. |
| 4 |
CHECK ATP SWITCH
- Turn ignition switch "OFF". (Stay for at least 5 seconds.)
- Remove ATP switch. Refer to
[4WD SYSTEM: COMPONENT PARTS LOCATION ].
- Push and release ATP switch and check continuity between ATP switch terminals 8 and 9.
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Are the inspection results normal? |
GO TO 5. |
Replace ATP switch. |
| 5 |
CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to
[TRANSFER CONTROL UNIT: REFERENCE VALUE ].
Are the inspection results normal? |
GO TO 6. |
Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts. |
| 6 |
CHECK ATP WARNING LAMP
- Turn ignition switch "ON". (Do not start engine.)
- A/T selector lever "N" position and engage the parking brake.
- Switch 4WD shift switch from 4H to 4LO or 4LO to 4H.
Does the ATP warning lamp turn ON while the actuator motor is operating? |
Inspection End. |
Refer to
[ATP WARNING LAMP DOES NOT TURN ON ]. |