DESCRIPTION
Refer to DTCs C1401 and C1402 (See page .gif)
).
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1407 C1408 |
Either condition is met:
|
|
HINT:
- DTC C1407 is for the rear speed sensor RH.
- DTC C1408 is for the rear speed sensor LH.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the skid control ECU (master cylinder solenoid), perform
calibration (See page
).
- Check the speed sensor signal after replacement (See page
).
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 |
|---|---|---|---|
|
RR Speed Open |
Rear speed sensor RH open detection/ Error or Normal |
Normal |
- |
|
RL Speed Open |
Rear 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 | .gif) |
GO TO STEP 4 |
|
.gif)
|
2. |
READ VALUE USING TECHSTREAM (REAR 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 C1407 and C1408 are not output |
A |
|
DTCs C1407 and/or C1408 are output |
B |
| A | |
USE SIMULATION METHOD TO CHECK |
| B | |
REPLACE MASTER CYLINDER SOLENOID |
|
4. |
INSPECT SKID CONTROL SENSOR WIRE |
Text in Illustration
|
*1 |
Skid Control Sensor Wire |
- |
- |
|
*a |
RH |
*b |
LH |
(a) Remove the skid control sensor wire.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
RH|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S22-4 - Xa1-2 (RR+) |
Always |
Below 1 Ω |
|
S22-3 - Xa1-1 (RR-) |
Always |
Below 1 Ω |
|
S22-4 - S22-3 |
Always |
10 kΩ or higher |
|
S22-4 - S22-1 |
Always |
10 kΩ or higher |
|
S22-4 - S22-2 |
Always |
10 kΩ or higher |
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S22-2 - Xa2-2 (RL+) |
Always |
Below 1 Ω |
|
S22-1 - Xa2-1 (RL-) |
Always |
Below 1 Ω |
|
S22-2 - S22-1 |
Always |
10 kΩ or higher |
|
S22-2 - S22-3 |
Always |
10 kΩ or higher |
|
S22-2 - S22-4 |
Always |
10 kΩ or higher |
| NG | |
REPLACE SKID CONTROL SENSOR WIRE |
|
|
5. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR SPEED SENSOR) |
(a) Install the skid control sensor wire.
(b) Disconnect the S1 skid control ECU (master cylinder solenoid) connector.
(c) Disconnect the Xa1 and/or Xa2 rear speed sensor connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
RH|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S1-5 (RR+) - Xa1-2 (RR+) |
Always |
Below 1 Ω |
|
S1-5 (RR+) - Body ground |
Always |
10 kΩ or higher |
|
S1-19 (RR-) - Xa1-1 (RR-) |
Always |
Below 1 Ω |
|
S1-19 (RR-) - Body ground |
Always |
10 kΩ or higher |
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S1-20 (RL+) - Xa2-2 (RL+) |
Always |
Below 1 Ω |
|
S1-20 (RL+) - Body ground |
Always |
10 kΩ or higher |
|
S1-6 (RL-) - Xa2-1 (RL-) |
Always |
Below 1 Ω |
|
S1-6 (RL-) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
INSPECT SKID CONTROL ECU (RR+, RL+ TERMINAL) |
(a) Disconnect the Xa1 and/or Xa2 rear speed sensor connector.
(b) Connect the S1 skid control ECU (master cylinder solenoid) connector.
|
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage: RH
|
|
| OK | |
REPLACE REAR SPEED SENSOR |
| NG | |
REPLACE MASTER CYLINDER SOLENOID |
