DTC B1475. Buick Enclave 2008

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2008 🢒 Enclave 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 DTC B1475

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 B1475 00: Retained Accessory Power Circuit

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition I/II Voltage	B1475 00	1	1	--
1. Retained Accessory Power (RAP) Malfunction

The body control module (BCM) controls the wired retained accessory power (RAP) components by applying voltage to the ignition I/II voltage circuit. Voltage is applied when any of the following is true:

•	Ignition switch is in ACC or ON.

•	The vehicle was remote started.

•	The vehicle is in RAP mode.

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. Refer to Circuit/System Description for specific conditions.

Conditions for Setting the DTC

The DTC will set only when the module requests the output and there is a short to ground in the ignition I/II voltage circuit.

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 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.

Diagnostic Aids

•	The radio RAP mode is separate function and will still operate properly.

•	The ignition switch may not return to the OFF position if voltage is not applied to the ignition I/II voltage circuit.

Reference Information

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 Testing

Ignition ON, verify DTC B1475 is set as current.

⇒	If DTC B1475 is not set as current, operate the vehicle within the Conditions for Setting the DTC.

Important: When cycling the ignition, keep ignition OFF for 5 seconds before checking for current DTC.

Disconnect each of the following components one at a time. The components may be disconnected in any order. After each component is disconnected, cycle the ignition and verify DTC B1475 remains set as current.

•	Automatic transmission shift lever

•	Sunroof shade module (with RPO C3U)

•	Sunroof control module (with RPO C3U)

•	Inside rearview mirror (with RPO DD7/DD8)

•	Auxiliary power outlet -- 115V AC (with RPO KVI)

•	Driver window switch (without RPO AXC/AXE)

•	Passenger window switch (without RPO AXC/AXE)

⇒	If DTC B1475 does not remain set as current, test or replace the last component that was disconnected.

With all components disconnected, cycle the ignition and verify DTC B1475 is not set as current.

⇒	If DTC B1475 remains set as current, test the ignition circuit terminal Z1 at the automatic transmission shift lever harness connector for a short to ground. If the circuit tests normal, replace the BCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	120-Volt Accessory Power Receptacle Replacement

•	Automatic Transmission Shift Lock Control Actuator Replacement

•	Control Module References for BCM, sunroof control module, sunroof shade module, inside rear view mirror, or window switch replacement, setup, and programming