C1782

SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1782/82: Low Battery Positive Voltage
C1782/82 - Low Battery Positive Voltage

DESCRIPTION





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
- When replacing the suspension control ECU, perform registration Programming and Relearning.
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. READ VALUE USING TECHSTREAM (IG/+B POWER SOURCE VOLTAGE)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Air suspension / Data List.

Air Suspension





Standard voltage:

11 to 14 V

Result





C -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Air Suspension System
A -- Continue to next step.

2. CHECK TERMINAL VOLTAGE (IG, B)

(a) Disconnect the A40 suspension control ECU connector.

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





Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - BODY GROUND)

(a) Disconnect the A40 and R22 suspension control ECU connectors.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK FOR DTC

(a) Clear the DTCs Air Suspension System.

(b) Check for DTCs Air Suspension System.

Result





B -- REPLACE SUSPENSION CONTROL ECU Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting