C1905

SUSPENSION CONTROL: ACTIVE STABILIZER SUSPENSION SYSTEM: C1905: Timeout Initialization Check of Rear Actuator

DTC C1905 - Timeout Initialization Check of Rear Actuator

DTC C1911 - Malfunction in Rear Active Stabilizer Main Relay

DTC C1923 - Short to GND in Rear Motor Driver

DTC C1924 - Short in Rear Motor Driver Circuit

DESCRIPTION

The rear active stabilizer control ECU and front active stabilizer control ECU use CAN communication to perform a mutual system check. If a problem occurs in the rear active stabilizer control ECU, rear active stabilizer control actuator, and PIG power source circuit, DTCs C1905, C1911, C1923 and C1924 are recorded.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (STB RR)
(a) Remove the STB RR H-fuse from the luggage room No. 6 relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





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. INSPECT REAR ACTIVE STABILIZER RELAY (STB RR)




(a) Remove the rear active stabilizer relay from the luggage room No. 6 relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






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

3. INSPECT FRONT ACTIVE STABILIZER RELAY (STB FR)




(a) Remove the front active stabilizer relay from the luggage room No. 6 relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






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

4. CHECK HARNESS AND CONNECTOR (RELAY BLOCK - BATTERY)




(a) Remove the rear active stabilizer relay from the luggage room No. 6 relay block.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE-RELATED)
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 according to the value(s) in the table below.
Standard resistance:






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

6. CHECK HARNESS AND CONNECTOR (REAR ACTIVE STABILIZER CONTROL ECU - RELAY BLOCK)




(a) Remove the front and rear active stabilizer relays from the luggage room No. 6 relay block.
(b) Disconnect the e1 rear active stabilizer control ECU connector.
(c) Disconnect the A49 front active stabilizer control ECU connector.
(d) 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.

7. CHECK OPERATION OF REAR ACTIVE STABILIZER CONTROL ECU
(a) Turn the engine 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 engine switch on (IG) and press the Techstream main switch ON.
(e) Clear the DTC Active Stabilizer Suspension System.
(f) Check for DTC.

Result





B -- REPLACE REAR ACTIVE STABILIZER CONTROL ACTUATOR
A -- REPLACE REAR ACTIVE STABILIZER CONTROL ECU