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Symptoms - Object Detection > < Object Detection Description and Operation - Traffic Sign Assist

Astra J

DTC B1405

Diagnostic Instructions

•  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
•  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
•  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B1405 02: Control Module Voltage Reference Output 2 Circuit Short to Ground
DTC B1405 03: Control Module Voltage Reference Output 2 Circuit Low Voltage
DTC B1405 07: Control Module Voltage Reference Output 2 Circuit High Voltage

Diagnostic Fault Information



Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance

8V Reference
B1405 02
B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 03
B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 07
-

Left Front Object Sensor Signal
B0954 06
B0954 06
B0954 01
B0954 08, B0954 21

Left Middle Front Object Sensor Signal
B0955 06
B0955 06
B0955 01
B0955 08, B0955 21

Right Middle Front Object Sensor Signal
B0956 06
B0956 06
B0956 01
B0956 08, B0956 21

Right Front Object Sensor Signal
B0957 06
B0957 06
B0957 01
B0957 08, B0957 21

Left Rear Object Sensor Signal
B0958 06
B0958 06
B0958 01
B0958 08, B0958 21

Left Middle Rear Object Sensor Signal
B0959 06
B0959 06
B0959 01
B0959 08, B0959 21

Right Middle Rear Object Sensor Signal
B0960 06
B0960 06
B0960 01
B0960 08, B0960 21

Right Rear Object Sensor Signal
B0961 06
B0961 06
B0961 01
B0961 08, B0961 21

Low Reference
-
B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06
-
-
 

Circuit/System Description

The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The parking assist control module supplies 8 V to the object sensors via the 8 V reference circuit and provides ground via the low reference circuit. The parking assist control module triggers the sensors in a sequential loop. After each sensor transmits, the parking assist control module uses the sensor echo received through the signal circuit to calculate the distance and position of an object.

Conditions for Running the DTC

•  Ignition ON
•  The parking assist is activated. The activation takes place through putting in the reverse gear or through operating the parking assist switch.

Conditions for Setting the DTC

B1405 02

The parking assist control module has detected the 8 V reference circuit is shorted to ground.

B1405 03

The parking assist control module has detected the 8 V reference circuit is less than 6.3 V.

B1405 07

The parking assist control module has detected the 8 V reference circuit is greater than 10.4 V.

Action Taken When the DTC Sets

•  The parking assist is disabled.
•  The driver information center displays SERVICE PARK ASSIST.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information


Schematic Reference

Object Detection Schematics


Connector End View Reference

Component Connector End Views


Description and Operation

Object Detection Description and Operation


Electrical Information Reference


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, activate the parking assist, observe the scan tool Park Assist Sensor Reference Voltage parameter. The reading should be between 6.3-10.4 V.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at each of the object sensors.
2. Ignition ON, test for 6.3-10.4 V between the 8 V reference circuit terminal 1 at the B78G Rear Object Sensor - Left Outer harness connector and ground.
⇒ If less than the specified range, test the 8 V reference circuit for a short to ground. If the circuit tests normal, replace the K41 Front and Rear Parking Assist Control Module.
⇒ If greater than the specified range, test the 8 V reference circuit for a short to voltage. If the circuit tests normal, replace the K41 Front and Rear Parking Assist Control Module.
3. Install each object alarm sensor harness connector one at a time, checking DTCs after each sensor is connected. Verify DTC B1405 is not set as current.
⇒ If the DTC is set, replace the object alarm sensor that was connected immediately before the DTC set.
4. If all circuits test normal, replace the K41 Front and Rear Parking Assist Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•  Control Module References for parking assist control module replacement, setup and programming

Symptoms - Object Detection > < Object Detection Description and Operation - Traffic Sign Assist