DESCRIPTION
Refer to DTCs C1401 and C1402 (See page ).
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1405 C1406 |
Either condition is met:
|
|
HINT:
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION) |
(a) Using the Techstream, check for any momentary interruption in the wire harness
and connector corresponding to the DTC (See page
).
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
FR Speed Open |
Front speed sensor RH open detection/ Error or Normal |
Normal |
- |
FL Speed Open |
Front speed sensor LH open detection/ Error or Normal |
Normal |
- |
OK:
Normal (there are no momentary interruptions).
HINT:
Perform the above inspection before removing the sensor and connector.
NG |
GO TO STEP 4 |
|
2. |
READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR) |
NG |
GO TO STEP 4 |
|
3. |
RECONFIRM DTC |
(a) Clear the DTCs (See page ).
(b) Turn the ignition switch off.
(c) Start the engine.
(d) Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
(e) Check if the same DTC is output (See page
).
Result |
Proceed to |
---|---|
DTCs C1405 and C1406 are not output |
A |
DTCs C1405 and/or C1406 are output |
B |
A |
USE SIMULATION METHOD TO CHECK |
B |
REPLACE MASTER CYLINDER SOLENOID |
4. |
INSPECT SKID CONTROL SENSOR WIRE |
(a) Remove the skid control sensor wire (See page ).
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance: for RH
|
|
NG |
REPLACE SKID CONTROL SENSOR WIRE |
|
5. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR) |
(a) Install the skid control sensor wire.
(b) Disconnect the A6 skid control ECU connector.
(c) Disconnect the z5 and/or z6 front speed sensor connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for RH
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A6-3 (FR+) - z5-2 (FR+) |
Always |
Below 1 Ω |
A6-3 (FR+) - Body ground |
Always |
10 kΩ or higher |
A6-17 (FR-) - z5-1 (FR-) |
Always |
Below 1 Ω |
A6-17 (FR-) - Body ground |
Always |
10 kΩ or higher |
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A6-18 (FL+) - z6-2 (FL+) |
Always |
Below 1 Ω |
A6-18 (FL+) - Body ground |
Always |
10 kΩ or higher |
A6-4 (FL-) - z6-1 (FL-) |
Always |
Below 1 Ω |
A6-4 (FL-) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. |
CHECK TERMINAL VOLTAGE (FR+, FL+) |
(a) Disconnect the z5 and/or z6 front speed sensor connector.
(b) Connect the A6 skid control ECU connector.
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage: for RH
|
|
OK |
REPLACE FRONT SPEED SENSOR |
NG |
REPLACE MASTER CYLINDER SOLENOID |
Trouble in Passenger Airbag ON/OFF Indicator
DESCRIPTION
The occupant classification system detects the front passenger seat condition.
The system then informs the passenger of the front passenger airbag assembly and
front passenger side knee airbag status (activated/not activated) with the passenge ...
Power Source Mode does not Change to ON (IG)
DESCRIPTION
When the engine switch is pushed with the key in the cabin, the power management
control ECU receives signals to switch the power source mode.
WIRING DIAGRAM
Refer to "Power Source Mode does not Change to on (IG and ACC)" (See page
...