Toyota 4Runner: Low Pressure Malfunction in Upside of KDSS System (C1851/51,C1853/53)
DESCRIPTION
In the KDSS hydraulic circuit, the fluid is contained under pressure. If the fluid temperature is 20°C (68°F), the pressure is approximately 3.0 MPa (30.6 kgf/cm2, 435 psi).
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1851/51 |
The sensor output is 0.9 MPa (9.2 kgf/cm2, 130 psi) or less for 5 min. continuously with the ignition switch ON. |
|
|
C1853/53 |
The sensor output is 8.8 MPa (89.7 kgf/cm2, 1276 psi) or more for 20 sec. continuously with the ignition switch ON. |
CAUTION / NOTICE / HINT
HINT:
- When these DTCs are output, perform the hydraulic circuit inspection
first (See page
.gif)
). - If the DTCs cannot be cleared even after the hydraulic circuit inspection, perform the electrical circuit inspection by following the procedures below.
PROCEDURE
|
1. |
INSPECT FOR FLUID LEAK |
(a) Inspect for fluid leaks (See page ).
OK:
No fluid leaks.
| NG | .gif) |
REPAIR FLUID LEAK OR REPLACE PARTS AS NECESSARY |
|
.gif)
|
2. |
CHECK ANY OTHER DTCS OUTPUT (DTC C1812/12, C1831/31 AND/OR C1832/32) |
(a) Check if DTC C1812/12, C1831/31 and/or C1832/32 is output (See page
).
Result
|
Result |
Proceed to |
|---|---|
|
No DTC is output |
A |
|
DTC C1812/12, C1831/31 and/or C1832/32 is output |
B |
| B | |
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
|
|
3. |
INSPECT STABILIZER CONTROL SOLENOID VALVE (CHECK IF VALVE STUCK) |
(a) Disconnect the stabilizer control with accumulator housing assembly connector.
(b) Check for an operating sound of the stabilizer control solenoid valve.
|
(1) for Upper Chamber: Connect terminal 5 (SLAL) to the positive (+) battery terminal, and terminal 4 (AUG) to the negative (-) battery terminal. OK: An operating sound (click sound) can be heard. Text in Illustration
|
|
|
(2) for Lower Chamber: Connect terminal 6 (SLAU) to the positive (+) battery terminal, and terminal 4 (AUG) to the negative (-) battery terminal. OK: An operating sound (click sound) can be heard. Text in Illustration
|
|
| NG | |
REPLACE STABILIZER CONTROL WITH ACCUMULATOR HOUSING ASSEMBLY |
|
|
4. |
INSPECT FOR CLOGS IN HYDRAULIC CIRCUIT |
(a) Bleed air and check that the hydraulic circuit is not clogged (See page
).
OK:
Hydraulic circuit is not clogged.
| NG | |
REPAIR HYDRAULIC CIRCUIT MALFUNCTIONS OR REPLACE PARTS AS NECESSARY |
|
|
5. |
RECONFIRM DTC |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
Result
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC is output |
B |
| A | |
USE SIMULATION METHOD TO CHECK |
| B | |
REPLACE STABILIZER CONTROL ECU |
Lost Communication with ECM/PCM "A" (U0100/71,U0122/71,U0124/71,U0126/71)
DESCRIPTION
DTC Code
DTC Detection Condition
Trouble Area
U0100/71
While driving at 30 km/h (19 mph), the ECM indicates a CAN communicatio ...
Pressure Sensor Malfunction / Upside (C1812/12)
DESCRIPTION
In the KDSS hydraulic circuit, the fluid is contained under pressure. If the
fluid temperature is 20°C (68°F), the pressure is approximately 3.0 MPa (30.6 kgf/cm2,
435 psi).
...
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