Automatic Drive Positioner (DTC/Circuit Diagnosis)
- CHECK LIFTING SWITCH SIGNAL
- Turn ignition switch OFF.
- Check voltage between driver seat control unit harness connector B222 and ground.
(+)
(-)
Condition
Voltage
(Approx.)
Driver seat control unit
Connector
Terminal
B222
7
Ground
Lifting switch (front)
Operate (downward)
0 V
Release
Battery voltage
23
Operate (upward)
0 V
Release
Battery voltage
Is the inspection result normal?
YES
GO TO STEP 5 .
NO
GO TO STEP 2 .
- CHECK LIFTING SWITCH (FRONT) CIRCUIT
- Turn ignition switch OFF.
- Disconnect driver seat control unit and power seat switch LH.
- Check continuity between driver seat control unit harness connector B222 and power seat switch LH harness connector B213.
Driver seat control unit
Power seat switch LH
Continuity
Connector
Terminal
Connector
Terminal
B222
7
B213
6
Yes
23
5
- Check continuity between driver seat control unit harness connector B222 and ground.
Driver seat control unit
Ground
Continuity
Connector
Terminal
B222
7
No
23
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Repair or replace harness.
- CHECK DRIVER SEAT CONTROL UNIT OUTPUT
- Connect the driver seat control unit.
- Turn ignition switch ON.
- Check voltage between driver seat control unit harness connector B222 and ground.
(+)
(-)
Voltage
(Approx.)
Driver seat control unit
Connector
Terminal
B222
7
Ground
Battery voltage
23
Is the inspection result normal?
YES
GO TO STEP 4 .
NO
Replace driver seat control unit. Refer to Removal and Installation .
- CHECK LIFTING SWITCH (FRONT)
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO STEP 5 .
NO
Replace power seat switch LH. Refer to Removal and Installation .
- CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .
Is the inspection result normal?
YES
Replace driver seat control unit. Refer to Removal and Installation .
NO
Repair or replace the malfunctioning part.