DTC U0028:87 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2883300

DTC

U0028:87

SAS control module system (CAN2 line malfunction)

DETECTION CONDITION

•  Communication error with SAS control module is detected in CAN communication.

POSSIBLE CAUSE

•  SAS control module malfunction

•  Open or short circuit in the CAN2_H wiring harness between DSC HU/CM terminal G and SAS control module terminal 2I

•  Open or short circuit in the CAN2_L wiring harness between DSC HU/CM terminal F and SAS control module terminal 2K

•  DSC HU/CM malfunction

•  Poor connection at connectors (female terminal)

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT SAS CONTROL MODULE MALFUNCTION • Switch the ignition to off. • Using the M-MDS, perform the DTC inspection for the SAS control module. (See DTC DISPLAY.) • Are any DTCs detected?	Yes	Go to applicable DTC inspection. (See DTC TABLE.)
1		No	Go to the next step.
2	INSPECT SAS CONTROL MODULE SIGNAL (CAN2 LINE) FOR OPEN CIRCUIT • Disconnect the DSC HU/CM connector. • Disconnect the SAS control module connectors. • Inspect for continuity between the following DSC HU/CM connector terminals (vehicle harness-side) and SAS control module connector terminals (vehicle harness-side): ― DSC HU/CM (CAN2_H): G—2I ― DSC HU/CM (CAN2_L): F—2K • Is there continuity?	Yes	Go to the next step.
2		No	Repair or replace the wiring harness, then go to Step 4.
3	INSPECT SAS control module SIGNAL (CAN2 LINE) FOR SHORT CIRCUIT • Inspect for continuity between the following DSC HU/CM connector terminals (vehicle harness-side) and body ground: ― DSC HU/CM (CAN2_H): G ― DSC HU/CM (CAN2_L): F • Is there continuity?	Yes	Repair or replace the wiring harness, then go to the next step.
3		No	Go to the next step.
4	VERIFY THAT THE SAME DTC IS NOT PRESENT • Reconnect all disconnected connectors. • Clear the DTCs from the memory. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more. • Are the same DTCs present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
4		No	Go to the next step.
5	VERIFY THAT NO OTHER DTCS ARE PRESENT • Are any other DTCs output?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
5		No	DTC troubleshooting completed.

DTC	U0028:87		SAS control module system (CAN2 line malfunction)
DETECTION CONDITION		• Communication error with SAS control module is detected in CAN communication.
POSSIBLE CAUSE		• SAS control module malfunction • Open or short circuit in the CAN2_H wiring harness between DSC HU/CM terminal G and SAS control module terminal 2I • Open or short circuit in the CAN2_L wiring harness between DSC HU/CM terminal F and SAS control module terminal 2K • DSC HU/CM malfunction • Poor connection at connectors (female terminal)