- When detecting the abnormal signal from the fluid pressure sensor (Fluid pressure sensor terminal voltage of ECU is 0.3 V or less or 4.7 V or more) for every 0.01 sec. and that condition continued for 1 sec.
- While the motor relay is not operating, the condition that the fluid pressure exceeds 1 MPa continued for 10 sec.
| Last Modified: 7-3-2017 | 6.8:8.0.40 | Doc ID: RM000001CU4004X |
| Model Year Start: 2007 | Model: LX470 | Prod Date Range: [08/2006 - ] |
| Title: SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: C1718; Pressure Sensor Circuit Malfunction; 2007 MY LX470 [08/2006 - ] | ||
|
DTC |
C1718 |
Pressure Sensor Circuit Malfunction |
DESCRIPTION
This circuit is sending the data to detect the pressure output from the pump and to judge the abnormality of the fluid pressure by the ECU.
HINT:
"Pressure sensor" refers to the fluid pressure sensor.
|
DTC No. |
DTC Detecting Condition |
Trouble Area |
|---|---|---|
|
C1718/18 |
Either of the following 1. or 2. is detected: |
|
Fail-safe function:
If a trouble occurs in the fluid pressure sensor circuit, the height control is prohibited after the ECU has adjusted the vehicle height to the standard.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK WIRE HARNESS (FLUID PRESSURE SENSOR - SUSPENSION CONTROL ECU) |
| NG |
|
|
|
2. |
CHECK SUSPENSION CONTROL ECU |
|
(a) Remove the suspension control ECU with connectors still connected. |
|
(b) Turn the ignition switch ON.
(c) Measure the voltage between terminals SHB and SHG of the suspension control ECU connector.
Standard voltage:
|
Tester Connection |
Specified Condition |
|---|---|
|
S7-1 (SHB) - S7-9 (SHG) |
Approximately 5 V |
| NG |
|
|
|
3. |
CHECK FLUID PRESSURE SENSOR |
|
(a) Start the engine and push the vehicle height select switch to select the N mode. |
|
(b) Measure the voltage between terminals 2 and 3 of the fluid pressure sensor connector.
Standard voltage:
|
Tester Connection |
Specified Condition |
|---|---|
|
F1-2 - F1-3 |
1.48 to 1.85 V |
| NG |
|
| OK |
|
|
|