DESCRIPTION
The navigation receiver assembly receives a vehicle speed signal from the combination meter assembly and information from the navigation antenna assembly, and then adjusts the vehicle position.
The navigation receiver assembly stores this DTC when the difference between the speed information that the navigation antenna assembly and the SPD pulse received from the combination meter assembly becomes large.
HINT:
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B15C2 |
A difference between the GPS speed and SPD pulse is detected |
|
WIRING DIAGRAM
1. for 1AR-FE
2. for 2GR-FE
PROCEDURE
1. |
CHECK SYSTEM SENSORS (OPERATION CHECK) |
(a) Enter the "System Sensors Check" screen. Refer to Check System Sensors in Operation Check (See page ). |
|
(b) While driving the vehicle, compare the value of "Speed" to the reading on the speedometer. Check if these readings are almost equal.
HINT:
The combination meter assembly receives the vehicle speed signal from the skid control ECU via CAN communication. Therefore, perform the following inspection referring to values on the Data List of the skid control ECU because it is the source of the vehicle speed signal.
OK:
Vehicle speed displayed on the "System Sensors Check" screen is almost the same as the actual vehicle speed measured using the Techstream (See page ).
OK |
REPLACE NAVIGATION RECEIVER ASSEMBLY |
|
2. |
INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM) |
(a) Check the output waveform. (1) Remove the combination meter assembly with the connector(s) still connected. (2) Connect an oscilloscope to terminal E1-16 (+S) and body ground. (3) Turn the ignition switch to ON. (4) Turn a wheel slowly. (5) Check the signal waveform according to the condition(s) in the table below.
OK: The waveform is similar to that shown in the illustration. HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows. Text in Illustration
|
|
NG |
GO TO METER / GAUGE SYSTEM |
|
3. |
INSPECT NAVIGATION RECEIVER ASSEMBLY (INPUT WAVEFORM) |
(a) Check the input waveform. (1) Remove the navigation receiver assembly with the connector(s) still connected. (2) Connect an oscilloscope to terminal E40-17 (SPD) and body ground. (3) Turn the ignition switch to ON. (4) Turn a wheel slowly. (5) Check the signal waveform according to the condition(s) in the table below.
OK: The waveform is similar to that shown in the illustration. HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows. |
|
*a |
Component with harness connected (Navigation Receiver Assembly) |
OK |
REPLACE NAVIGATION RECEIVER ASSEMBLY |
|
4. |
CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - JUNCTION CONNECTOR) |
(a) Disconnect the E40 navigation receiver assembly connector.
(b) Disconnect the E31 junction connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E40-17 (SPD) - E31-20 |
Always |
Below 1 Ω |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR) |
(a) Disconnect the E1 combination meter assembly connector.
(b) Disconnect the E31 junction connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E1-16 (+S) - E31-19 |
Always |
Below 1 Ω |
OK |
REPLACE JUNCTION CONNECTOR |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the cruise control system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT FRONT SEATBACK HEATER LH
(a) Apply battery voltage and check the seatback heater.
OK:
Measurement Connection
Condition
Specified Condition
...
Components
COMPONENTS
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
...