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 |
Lost Communication with Brake System Control Module (U0129/29)
DESCRIPTION
The tire pressure warning ECU and receiver receives signals from the skid control
ECU (brake actuator assembly) via the CAN communication system.
DTC No.
DTC Detection Condition
Trouble Area
U0129/29
Lost communication with ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT REAR AXLE SHAFT
(a) Using a dial indicator, measure the runout of the shaft and flange.
Maximum runout:
Shaft runout: 1.5 mm (0.0591 in.)
Flange runout: 0.05 mm (0.0020 in.)
If the rear axle shaft or flange is damaged or worn, or the runout is greater
than ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Air Conditioning System
DTC Code
Detection Item
Memory
See page
B1412
Ambient Temperature Sensor Circuit
Memorized
(4 seconds or more)
B1413
...