C1933

SUSPENSION CONTROL: ACTIVE STABILIZER SUSPENSION SYSTEM: C1930-C1933,C1936-C1938,C193A: Open in Front Metal Board Temperature Sensor Circuit


DESCRIPTION

The front active stabilizer control ECU consists of a metal board, control board, power source IC, step-up circuit, EEPROM, and other parts. If a problem occurs in the front active stabilizer control ECU and PIG power source circuit, DTCs C1930, C1931, C1932, C1933, C1936, C1937, C1938 and C193A are stored.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (STB FR)

(a) Remove the STB FR H-fuse from the luggage room No. 6 relay block.

(b) Measure the resistance of the H-fuse.

Standard resistance:

Below 1 Ohms

HINT
When a fuse burns out during installation, there may be a power source-related short.

NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK WIRE HARNESS (RELAY BLOCK - BATTERY)

(a) Remove the front active stabilizer relay from the luggage room No. 6 relay block.





(b) Measure the voltage of the relay block.

Standard voltage:





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

3. INSPECT FRONT ACTIVE STABILIZER RELAY (Marking: STB FR)

(a) Remove the front active stabilizer relay from the luggage room No. 6 relay block.





(b) Measure the resistance of the relay.

Standard resistance:





NG -- REPLACE FRONT ACTIVE STABILIZER RELAY
OK -- Continue to next step.

4. INSPECT REAR ACTIVE STABILIZER RELAY (Marking: STB RR)

(a) Remove the rear active stabilizer relay from the luggage room No. 6 relay block.





(b) Measure the resistance of the relay.

Standard resistance:





NG -- REPLACE REAR ACTIVE STABILIZER RELAY
OK -- Continue to next step.

5. CHECK ACTIVE STABILIZER RELAY CIRCUIT

(a) Remove the front and rear active stabilizer relays from the luggage room No. 6 relay block.





(b) Measure the resistance of the relay block.

Standard resistance:





NG -- REPAIR OR REPLACE LUGGAGE ROOM RELAY BLOCK
OK -- Continue to next step.

6. CHECK WIRE HARNESS (FRONT ACTIVE STABILIZER CONTROL ECU - RELAY BLOCK)

(a) Disconnect the A58 front active stabilizer control ECU connector.





(b) Remove the front active stabilizer relay from the luggage room No. 6 relay block.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





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

7. CHECK WIRE HARNESS (REAR ACTIVE STABILIZER CONTROL ECU - RELAY BLOCK)

(a) Disconnect the y1 rear active stabilizer control ECU connector.





(b) Remove the rear active stabilizer relay from the luggage room No. 6 relay block.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





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

8. CHECK OPERATION OF FRONT ACTIVE STABILIZER CONTROL ECU

(a) Turn the power switch OFF.

(b) Exchange the rear active stabilizer control ECU with the front active stabilizer control ECU.

(c) Connect Techstream to the DLC3.

(d) Turn the power switch ON (IG) and press the Techstream main switch ON.

(e) Clear the DTC Active Stabilizer Suspension System.

(f) Check for DTC.

Result





NG -- CHECK INTERMITTENT PROBLEMS

A -- REPLACE FRONT ACTIVE STABILIZER CONTROL ECU