THEFT DETERRENT SYSTEM, Diagnostic DTC:B2769
| DTC Code | DTC Name |
|---|---|
| B2769 | Tilt Sensor Signal Circuit Malfunction |
DESCRIPTION
This DTC is stored when one of the following occurs: 1) tilt sensor (yaw rate sensor assembly) power supply malfunction; 2) tilt sensor (yaw rate sensor assembly) open malfunction; or 3) EEPROM malfunction.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
B2769 |
Tilt Sensor Signal Circuit Malfunction |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.
PROCEDURE
CHECK HARNESS AND CONNECTOR (TILT SENSOR [YAW RATE SENSOR ASSEMBLY] - BATTERY AND BODY GROUND)
-
*a
Front view of wire harness connector
(to Tilt Sensor [Yaw Rate Sensor Assembly])
Disconnect the tilt sensor (yaw rate sensor assembly) connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection
Condition
Specified Condition
N16-6 (+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
N16-1 (GND) - Body ground
Always
Below 1 Ω
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
-
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - TILT SENSOR [YAW RATE SENSOR ASSEMBLY])
Disconnect the G79 main body ECU (multiplex network body ECU) connector.
Disconnect the N16 tilt sensor (yaw rate sensor assembly) connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
G79-6 (GCS) - N16-5 (CSIF)
Always
Below 1 Ω
G79-6 (GCS) - Body ground
Always
10 kΩ or higher
N16-5 (CSIF) - Body ground
Always
10 kΩ or higher
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
CHECK WAVEFORM (TILT SENSOR [YAW RATE SENSOR ASSEMBLY]) (CSIF)
Using an oscilloscope, check the waveform.
*a
Component with harness connected
(Main Body ECU [Multiplex Network Body ECU])
*b
CSIF Initial Signal
*c
CSIF Initial Response
*d
Approximately 1.0 seconds
*e
Initial Diagnosis
*f
Approximately 1.0 to 1.6 seconds
*g
Approximately 0.05 seconds
*h
Approximately 5.5 seconds
*i
Disarmed State
*j
Arming Preparation State
*k
HI
*l
LO
Table 1. Measurement Condition Tester Connection
Content
Tester Connection
G79-6 (GCS) - Body ground
Tool Setting
2 V/DIV., 100 ms./DIV.
Condition
Theft deterrent system is set (system changes from disarmed state to arming preparation state)
Tip:If the tilt sensor (yaw rate sensor assembly) is normal, an initial response is output in response to the HI input from the main body ECU (multiplex network body ECU).
If the waveform output remains LO, there may be a problem with the main body ECU (multiplex network body ECU), as there is no input from the main body ECU (multiplex network body ECU).
OK
The waveform displays properly (HI is 6.5 V or higher and LO is below 1 V).
Result
Result
Proceed to
NG (Waveform output remains LO)
A
NG (There is no initial response and the waveform output remains HI)
B
OK (There is an initial response)
C