- Battery
- Charging system
- Harness or connector
- AHC-B fuse
- AHC-B No. 2 fuse
- Suspension control ECU
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Suspension | Section: Suspension Control System | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000003AT2001X |
| Title: SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: DESCRIPTION (2008 LX570) | ||
|
DTC |
C1782 |
Power Source Voltage Malfunction |
DESCRIPTION
|
DTC Code |
Detection Condition |
Trouble Area |
|---|---|---|
|
C1782 |
While the engine switch is on (IG), voltage at terminal IG, BAT and/or BAT2 is 10 V or less, or 16 V or more for 0.5 seconds. |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
- Even if DTC C1781 is stored at the same time, perform the inspection for DTC C1782 first.
- Before performing troubleshooting, inspect the connectors of related circuits.
-
If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed
.
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (IG POWER SOURCE VOLTAGE) |
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and the Techstream on.
(d) Enter the following menus: Chassis / AHC / Data List.
(e) According to the display on the Techstream, read the Data List.
AHC
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
IG Power Source Voltage |
Power supply voltage / min.: 0 V max.: 255 V |
Engine switch on (IG): 11 to 14 V |
- |
OK:
11 to 14 V
|
|
2. |
RECONFIRM DTC OUTPUT |
(a) Clear the DTCs
.
(b) Check for DTCs.
Result
|
Result |
Proceed to |
|---|---|
|
DTC is output |
A |
|
DTC is not output |
B |
|
|
3. |
READ VALUE USING TECHSTREAM (+B POWER SOURCE VOLTAGE, +B2 POWER SOURCE VOLTAGE) |
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and the Techstream on.
(d) Enter the following menus: Chassis / AHC / Data List.
(e) According to the display on the Techstream, read the Data List.
AHC
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
+B Power Source Voltage |
Power supply for absorber control actuator / min.: 0 V max.: 255 V |
Engine switch on (IG): 11 to 14 V |
- |
|
+B2 Power Source Voltage |
Power supply for No. 1 height control valve and front suspension control valve / min.: 0 V max.: 255 V |
Engine switch on (IG): 11 to 14 V |
- |
OK:
11 to 14 V
|
|
4. |
INSPECT FUSE (AHC-B, AHC-B NO. 2) |
(a) Remove the AHC-B and AHC-B No. 2 fuses from the cowl side junction block RH.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
AHC-B fuse |
Always |
Below 1 Ω |
|
AHC-B No. 2 fuse |
Always |
Below 1 Ω |
|
|
5. |
CHECK HARNESS AND CONNECTOR (BATTERY - SUSPENSION CONTROL ECU) |
(a) Disconnect the K30 and K31 ECU connectors.
|
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
|
6. |
CHECK HARNESS AND CONNECTOR (BATTERY - ECU AND BODY GROUND) |
(a) Disconnect the K30 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
K30-5 (IG) - Body ground |
Engine switch on (IG) |
11 to 14 V |
|
|
|