SAAB WIS ONLINE

DTC B2730

DTC B2730

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 Descriptor

DTC B2730 00

Interior Trunk Lid Unlatch Switch Circuit

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Rear Closure Relay B+

2

2

-

-

Rear Compartment Lid Release Switch Signal

B2730 00

1

1

-

Rear Closure Relay Control

B3265 02

2

2

-

Rear Compartment Lid Latch Control

2

2

2

-

Rear Compartment Lid Release Switch Ground

-

1

1

-

Passenger Door Handle Switch Ground

-

1

1

-

Rear Compartment Lid Latch Ground

-

2

2

-

Rear Closure Relay Ground

-

2

2

-

1. Rear Compartment Lid Release Switch Malfunction

2. Rear Compartment Lid Release Malfunction



Circuit/System Description

When the ignition is ON, the body control module (BCM) supplies a signal to the rear compartment lid release switch through the trunk release switch signal circuit. When the rear compartment lid release switch is pressed, the voltage within the signal circuit is pulled low and in response, the BCM will energize the trunk release relay.

Conditions for Running the DTC

Battery voltage is between 9-16 V.

Conditions for Setting the DTC

The BCM detects a short to ground in the rear compartment lid release switch signal circuit for greater than 60 s.

Action Taken When the DTC Sets

The BCM ignores the input from the rear compartment lid release switch.

Conditions for Clearing the DTC


• The DTC will be current for as long as the fault is present.

• When the fault is no longer present, the DTC will be a history DTC.

• A history DTC will clear after 50 ignition cycles.


Reference Information

Schematic Reference

Release Systems Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Luggage Compartment Description and Operation

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Interior Trunk Lid/Liftgate Window Unlatch Switch parameter while pressing and releasing the rear compartment lid release switch. The parameter should change between Active and Inactive.

Circuit/System Testing


1. Ignition OFF, disconnect the harness connector at the M30 Liftgate Latch.

2. Ignition ON, verify the scan tool Interior Trunk Lid/Liftgate Window Unlatch Switch parameter is Inactive.

3. If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K9 Body Control Module.

4. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 1. Verify the scan tool Interior Trunk Lid/Liftgate Window Unlatch Switch parameter is Active.

5. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

6. If all circuits test normal, test or replace the M30 Liftgate Latch.


Component Testing


Trunk Release Switch

1. Ignition OFF, disconnect the harness connector at the M30 Liftgate Latch.

2. Test for infinite resistance between the signal terminal 2 and the ground terminal 1 with the switch in the open position.

3. If not the specified value, replace the M30 Liftgate Latch.

4. Test for less than 2 Ω between the signal terminal 2 and the ground terminal 1 with the switch in the closed position.

5. If greater than the specified range, replace the M30 Liftgate Latch.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Rear Compartment Lid Latch Replacement

• Control Module References for remote control door lock receiver replacement, setup, and programming