C1782

SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1782: Power Source Voltage Malfunction

DTC C1782 - Power Source Voltage Malfunction

DESCRIPTION





WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE:
- Before performing troubleshooting, inspect the connectors of related circuits.
- Before replacing the suspension control ECU, perform all of the following again: 1) symptom simulation Electronic Circuit Inspection Procedure; 2) DTC inspection; and 3) intelligent tester or Techstream inspection (Data List or Active Test). If no malfunctions are found in other areas, replace the suspension control ECU.
- If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed Testing and Inspection.

PROCEDURE

1. CHECK IG VOLTAGE (DATA LIST)
(a) Turn the power switch OFF.
(b) Connect the intelligent tester or Techstream to the DLC3.
(c) Turn the power switch ON (IG) and the tester ON.
(d) Enter the following menus:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / CHASSIS / AIR SUSPENSION / DATA LIST.
(2) Techstream - Select: Chassis / Air suspension / Data List.
(e) Using the intelligent tester or Techstream, read the DATA LIST.
(1) Intelligent tester

AIR SUSPENSION





(2) Techstream

Air suspension





OK:
11 to 14 V
NG -- CHECK AUXILIARY BATTERY VOLTAGE
OK -- Continue to next step.
2. CHECK DTC
(a) Clear the DTC Air Suspension System.
(b) Check for DTC Air Suspension System.

Result





B -- REPLACE SUSPENSION CONTROL ECU
A -- USE SIMULATION METHOD TO CHECK
3. CHECK AUXILIARY BATTERY VOLTAGE
(a) Disconnect the L88 ECU connector.





(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
OK -- Continue to next step.
4. CHECK DTC
(a) Clear the DTC Air Suspension System.
(b) Check for DTC Air Suspension System.

Result





B -- REPLACE SUSPENSION CONTROL ECU
A -- USE SIMULATION METHOD TO CHECK