DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PRECAUTION
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CHECK FOR OPEN IN CAN BUS WIRE (POSITION CONTROL ECU AND SWITCH CAN BRANCH WIRE)
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH - BATTERY AND BODY GROUND)
DTC U0208 Lost Communication with "Seat Control Module A"
DESCRIPTION
| DTC Code | DTC Detection Condition | Trouble Area |
| U0208 | There is no communication from the position control ECU and switch. | Power source circuit of position control ECU and switch
Position control ECU and switch CAN branch wire or connector
Position control ECU and switch
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For vehicles with seat memory.
WIRING DIAGRAM
INSPECTION PROCEDURE
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
- Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
- After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work ().
| 2.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL |
Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
- For vehicles with an SRS system:
- Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
- When disconnecting the cable, some systems need to be initialized after the cable is reconnected ().
| 3.CHECK FOR OPEN IN CAN BUS WIRE (POSITION CONTROL ECU AND SWITCH CAN BRANCH WIRE) |
Disconnect the c27 position control ECU and switch connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| c27-5 (MPX1) - c27-1 (MPX2) | Ignition switch off | 54 to 69 Ω |
Text in Illustration| *a | Front view of wire harness connector
(to Position Control ECU and Switch) |
| | REPAIR OR REPLACE POSITION CONTROL ECU AND SWITCH CAN BRANCH WIRE OR CONNECTOR (MPX1, MPX2) |
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| 4.CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH - BATTERY AND BODY GROUND) |
Connect the cable to the negative (-) battery terminal.
- When disconnecting the cable, some systems need to be initialized after the cable is reconnected ().
Disconnect the c26 position control ECU and switch connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| c26-5 (+B) - Body ground | Always | 11 to 14 V |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| c26-1 (GND) - Body ground | Always | Below 1 Ω |
Text in Illustration| *a | Front view of wire harness connector
(to Position Control ECU and Switch) |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| REPLACE POSITION CONTROL ECU AND SWITCH ()
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