GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2007 🢒 DTS 🢒 DTC 🢒 DTC B0005

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 B0005 00: In Park Signal Circuit

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Park Enable Signal Circuit

B0005

1

1

--

1. Will cause symptom related to the middle doors.

Circuit/System Description

The park enable signal circuit is a voltage output from the body control module (BCM) energizing the DR UNLATCH relay in the rear fuse block.

Conditions for Running the DTC
    • The system voltage is between 9-16 volts.
    • The DTC can only set when the output is actively being requested by the module.

Conditions for Setting the DTC

The DTC will set only when the module requests the output and there is a short to ground.

Action Taken When the DTC Sets

The module output driver will be shut down and not supply voltage to the circuit.

Conditions for Clearing the DTC
    • The current DTC will clear when the module request for the output is removed or the malfunction is no longer present.
    • A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.

Reference Information

Schematic Reference

Door Lock/Indicator Schematics

Connector End View Reference

Electrical Center Identification Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Circuit/System Testing
  1. Disconnect the DR UNLATCH relay in the rear fuse block. Connect a test lamp between the park enable signal circuit of the relay and battery positive voltage. The test lamp should not illuminate.
    2. ⇒If the test lamp does illuminate, test for a short to ground on the park enable signal circuit. If the circuit tests normal and the DTC is current, replace the BCM.
  2. If the circuit tests normal and the DTC is current, test or replace the DR UNLATCH relay or BCM.

Component Testing

Relay Test

  1. Ignition OFF, disconnect the DR UNLATCH relay.
  2. Test for 70-110 ohms of resistance between terminals 85 and 86.
    3. ⇒If the resistance is not within the specified range, replace the relay.
  3. Test for infinite resistance between the following terminals:
    4. • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    ⇒If less than infinite, replace the relay.
  4. Install a 20-amp fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms of resistance between terminals 30 and 87.
    5. ⇒If greater than 2 ohms, replace the relay.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for module replacement, setup, and programming