C1756

SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: C1756: Suspension Control Relay Malfunction
C1756 - Suspension Control Relay Malfunction

DESCRIPTION

This relay is to supply the power source to the pump and motor. The relay stays on while the height control is operated.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
- 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 Programming and Relearning.

PROCEDURE

1. INSPECT SUSPENSION CONTROL RELAY (AHC)

(a) Remove the suspension control relay from the engine room relay block.

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





Standard Resistance:





NG -- REPLACE SUSPENSION CONTROL RELAY
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - RELAY BLOCK AND BODY GROUND)





(a) Remove the suspension control relay from the engine room relay block.

(b) Disconnect the K32 ECU connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

OK -- REPLACE SUSPENSION CONTROL ECU Removal