DESCRIPTION
The door control receiver is used to receive radio waves relating to the entry functions of the electrical key transmitter sub-assembly. The certification ECU (smart key ECU assembly) decodes the requested electrical key transmitter sub-assembly by identifying a key code based on the radio waves received via the door control receiver. The door control receiver receives a signal from the electrical key transmitter sub-assembly and sends signals to the main body ECU (multiplex network body ECU) through the certification ECU (smart key ECU assembly). The certification ECU (smart key ECU assembly) then sends a command, according to the requested operation, to each ECU (ex. if door lock operation is requested, the certification ECU (smart key ECU assembly) sends a door lock command to the main body ECU (multiplex network body ECU)).
DTC No. |
DTC Detecting Condition |
Trouble Area |
---|---|---|
B1242 |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Disconnect the door control receiver connector. |
|
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
T24-8 (+5) - T24-12 (GND) |
Engine switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed |
Below 1 V → 4.5 to 5.5 V (Pulse generation) |
T24-2 (DATA) - T24-12 (GND) |
Engine switch off |
11 to 14 V pulse generation at regular intervals |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
T24-12 (GND) - Body ground |
Always |
Below 1 Ω |
*a |
Front view of wire harness connector (Door control receiver) |
OK |
REPLACE DOOR CONTROL RECEIVER |
|
2. |
CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
(a) Disconnect the certification ECU (smart key ECU assembly) connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C28-19 (CSEL) - T24-6 (CSEL) |
Always |
Below 1 Ω |
C28-20 (RDAM) - T24-2 (DATA) |
Always |
Below 1 Ω |
C28-18 (RCO) - T24-8 (+5) |
Always |
Below 1 Ω |
C29-11 (E) - Body ground |
Always |
Below 1 Ω |
T24-12 (GND) - Body ground |
Always |
Below 1 Ω |
C28-19 (CSEL) or T24-6 (CSEL) - Body ground |
Always |
10 kΩ or higher |
C28-22 (RDAM) or T24-2 (DATA) - Body ground |
Always |
10 kΩ or higher |
C28-18 (RCO) or T24-8 (+5) - Body ground |
Always |
10 kΩ or higher |
OK |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Radio Receiver Power Source Circuit
DESCRIPTION
This is the power source circuit to operate the navigation receiver assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing
the following inspection procedure.
PROCEDURE
1.
...
Lost Communication With Vehicle Dynamics Control Module (U0122)
DESCRIPTION
This DTC is detected if communication is lost with the skid control ECU (brake
actuator assembly).
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
U0122
Lost Communication with Vehicle Dynamics Contro ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Differential System (w/ Differential Lock)
DTC Code
Detection Item
See page
P163B
4WD ECU Malfunction
P17BB
Rear Differential Lock Position SW Stuck OFF
...