Inspection Procedure

1. Disconnect the A58 front active stabilizer control ECU connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   STANDARD RESISTANCE REFERENCE
   
   

   Tester Connection	Specified Condition
   A58-1 (LCN+) - A58-8 (LCN-)	54 to 69 Ω
   A58-2 (CANH) - A58-3 (CANL)	54 to 69 Ω

Fig 1: Identifying A58 Front Active Stabilizer Control ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the y1 rear active stabilizer control ECU connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   STANDARD RESISTANCE REFERENCE
   
   

   Tester Connection	Specified Condition
   y1-1 (LCN+) - y1-8 (LCN-)	54 to 69 Ω
   y1-2 (CANH) - y1-3 (CANL)	54 to 69 Ω

Fig 2: Identifying y1 Rear Active Stabilizer Control ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the power switch OFF.
2. Exchange the front active stabilizer control ECU with the rear active stabilizer control ECU.
3. Connect Techstream to the DLC3.
4. Turn the power switch ON (IG) and press the Techstream main switch ON.
5. Clear the DTC (see DTC CHECK / CLEAR  ).
6. Check for DTC.

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   DTC is not output	A
   DTC C192F is output	B

A: CHECK INTERMITTENT PROBLEMS 

B: REPLACE FRONT ACTIVE STABILIZER CONTROL ECU