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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Impala 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Retained Accessory Power Malfunction

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.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

RAP Relay Coil Supply Voltage

B1475, 1

1

6

--

Left Front Door Ajar Switch Signal

2,4

3

--

--

Left Front Door Open Switch Signal

9

5

--

--

Left Rear Door Ajar Switch Signal

2,4

3

--

--

Passenger Door Open Switch Signal

4*

7*

--

--

Right Front Door Ajar Switch Signal

2,4

3

--

--

Right Rear Door Ajar Switch Signal

2,4

3

--

--

Ground (Door Lock Actuator)

--

8

--

--

Ground (RAP Relay)

--

1

--

----

  1. All RAP functions except radio and Onstar® inoperative.
  2. A Door Ajar message will appear on the DIC for the individual door when the vehicle is shifted out of park.
  3. No message will appear on the DIC for the individual door when ajar.
  4. All relay controlled RAP functions inoperative.
  5. Serial data controlled RAP will not turn off and the courtesy lamps will not illuminate when the driver door is opened.
  6. RAP remains on past the timer limit after key out and will not turn off when a vehicle door is opened.
  7. Courtesy lamps inoperative from individual door or all passenger doors depending on location of open.
  8. RAP remains on, Door Open message and courtesy lamps inoperative when the individual door is opened or ajar.
  9. All RAP functions inoperative when ignition is turned off.

* On the sedan, both rear door open switch and the front passenger door open switch signal circuits are spliced together as a single input to the BCM.

Circuit/System Description

The retained accessory power (RAP) relay is located in the instrument panel (I/P) fuse block. The relay control is from the BCM and the coil ground is from G302. The relay switched output feeds the RAP fuse 10 A and the PWR/WNDW circuit breaker both within the I/P fuse block. The RAP fuse supplies voltage to the shift lock control solenoid, inside rearview mirror, and if equipped the sunroof.

Diagnostic Aids
    • The Radio RAP function is a separate radio function controlled by the radio and is not effected by the BCM RAP circuits.
    • A short to ground or open/high resistance in the accessory voltage circuit will cause only part of the RAP functions to be inoperative. Diagnose these symptoms within the respective system sections.
    • A short to voltage on the relay control or relay output circuits would cause the RAP function to remain on past the designated time.
    • A stuck relay switch could cause a RAP always on, or a RAP inoperative condition.

Reference Information

Schematic Reference

    •  Power Distribution Schematics
    •  Power Moding Schematics
    •  Interior Lights Schematics

Connector End View Reference

    •  Master Electrical Component List
    •  Vehicle Access Connector End Views

Description and Operation

Retained Accessory Power (RAP) Description and Operation

Electrical Information Reference

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

Scan Tool Reference

    •  Scan Tool Data List
    •  Scan Tool Data Definitions
    •  Scan Tool Output Controls

Circuit/System Verification

    Important: Note that the BCM receives a single input for all passenger door open switches.

  1. Ignition ON, observe the scan tool parameters listed below while opening and closing each vehicle door. The reading should change between Door Closed/Door Ajar for the door ajar switches, and between Closed/Open for the door open switches.
    2. • Driver Door Ajar Sw.
    • Left Rear Door Ajar Sw.
    • Passenger Door Ajar Sw.
    • Right Rear Door Ajar Sw.
    • Driver Door Open Sw.
    • Passenger Door Open Sw.
    ⇒If any parameter does not change as specified, refer to Door Ajar/Open Switch Test.
  2. Command the scan tool Accy/RAP Relay OFF. Using a power window switch, attempt to operate any window. The window should not operate.
    3. ⇒If the window does operate, refer to Rap Relay Circuit Test.
  3. Command the scan tool Accy/RAP Relay ON. Using a power window switch, attempt to operate any window. The window should operate.
    4. ⇒If the window does not operate, refer to Rap Relay Circuit Test.
  4. Ignition ON, all doors closed. Observe the scan tool parameter Accy/RAP Relay Command. Ignition OFF, key removed, the reading should be ON for approximately 10 minutes then change to OFF.
    5. ⇒If the parameter does not respond as specified, replace the BCM.
  5. If all the above tests were normal and the radio is the only RAP concern, replace the radio.

Circuit/System Testing

Rap Relay Circuit Test

  1. Ignition OFF, disconnect the RAP Relay.
  2. Test for less than 1 ohm of resistance between ground circuit terminal 88 and ground.
    3. ⇒If greater than 1.0 ohm, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between control circuit terminal 85 and ground.
  4. With the driver and passenger doors open, cycle the ignition key ON and OFF several times. The test lamp should turn ON and OFF when cycling the ignition switch.
    5. ⇒If the test lamp remains ON all the time, test for a short to voltage on the relay coil control circuit. If the circuit tests normal, replace the BCM.
    ⇒If the test lamp remains OFF all the time, test for a short to ground or open/high resistance on the relay coil control circuit. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the RAP relay.

Door Ajar Switch Circuit Test

  1. Ignition OFF, disconnect the C1 harness connector at the appropriate door lock actuator.
  2. Test for less than 1.0 ohm of resistance between the appropriate ground circuit terminal listed below and ground.
    3. • Driver door, coupe - terminal D
    • Driver door, sedan, base, - terminal 6
    • Driver door, sedan, uplevel - terminal 8
    • Front passenger, coupe, - terminal A
    • Front passenger, sedan - terminal 3
    • Left rear - terminal 6
    • Right rear - terminal 3
    ⇒If greater than the specified range, test the appropriate ground circuit for an open/high resistance.
  3. Ignition ON, verify the appropriate scan tool parameter listed below is Door Closed.
    4. • Driver Door Ajar Sw.
    • Passenger Door Ajar Sw.
    ⇒If not the specified value, test the appropriate signal circuit listed below for a short to ground. If the circuit tests normal, replace the BCM.
    • Driver door, coupe - terminal B
    • Driver door, sedan, base - terminal 4
    • Driver door, sedan, uplevel - terminal 6
    • Coupe, front passenger - terminal C
    • Front passenger, Sedan - terminal 1
    • Left rear, sedan - terminal 4
    • Right rear, sedan - terminal 1
  4. Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and ground.
    5. • Driver door, coupe - terminal B
    • Driver door, sedan, base - terminal 4
    • Driver door, sedan, uplevel - terminal 6
    • Coupe, front passenger - terminal C
    • Front passenger, Sedan - terminal 1
    • Left rear, sedan - terminal 4
    • Right rear, sedan - terminal 1
  5. Verify the appropriate scan tool parameter is Door Ajar.
    6. • Driver Door Ajar Sw.
    • Passenger Door Ajar Sw.
    ⇒If not the specified value, test the appropriate signal circuit terminal listed below for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
    • Driver door, coupe - terminal B
    • Driver door, sedan, base - terminal 4
    • Driver door, sedan, uplevel - terminal 6
    • Coupe, front passenger - terminal C
    • Front passenger, Sedan - terminal 1
    • Left rear, sedan - terminal 4
    • Right rear, sedan - terminal 1
  6. If all circuits test normal, test or replace the appropriate door lock actuator.

Door Open Switch Circuit Test

  1. Ignition OFF, disconnect the C1 harness connector at the appropriate door lock actuator.
  2. Test for less than 1.0 ohm of resistance between the appropriate ground circuit terminal listed below and ground.
    3. • Driver door, coupe - terminal D
    • Driver door, sedan, base, - terminal 6
    • Driver door, sedan, uplevel - terminal 8
    • Front passenger, coupe, - terminal A
    • Front passenger, sedan - terminal 3
    • Left rear - terminal 6
    • Right rear - terminal 3
    ⇒If greater than the specified range, test the appropriate ground circuit for an open/high resistance.
  3. Ignition ON, verify the appropriate scan tool parameter listed below is Closed.
    4. • Driver Door Open Sw.
    • Passenger Door Open Sw.
    ⇒If not the specified value, test the appropriate signal circuit listed below for a short to ground. If the circuit tests normal, replace the BCM.
    • Driver door, coupe - terminal C
    • Driver door, sedan, base - terminal 5
    • Driver door, sedan, uplevel - terminal 7
    • Coupe, front passenger - terminal B
    • Front passenger, Sedan - terminal 2
    • Left rear, sedan - terminal 5
    • Right rear, sedan - terminal 2
  4. Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and ground.
    5. • Driver door, coupe - terminal C
    • Driver door, sedan, base - terminal 5
    • Driver door, sedan, uplevel - terminal 7
    • Coupe, front passenger - terminal B
    • Front passenger, Sedan - terminal 2
    • Left rear, sedan - terminal 5
    • Right rear, sedan - terminal 2
  5. Verify the appropriate scan tool parameter is Open.
    6. • Driver Door Open Sw.
    • Passenger Door Open Sw.
    ⇒If not the specified value, test the appropriate signal circuit terminal listed below for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
    • Driver door, coupe - terminal C
    • Driver door, sedan, base - terminal 5
    • Driver door, sedan, uplevel - terminal 7
    • Coupe, front passenger - terminal B
    • Front passenger, Sedan - terminal 2
    • Left rear, sedan - terminal 5
    • Right rear, sedan - terminal 2
  6. If all circuits test normal, test or replace the appropriate door lock actuator.

Component Testing

Door Ajar Switch Test

  1. Ignition OFF, disconnect the C1 harness connector at the appropriate door lock actuator.
  2. Test for infinite resistance between the appropriate signal and ground terminals listed below with the switch in the open position.
    3. • Driver door, coupe - signal terminal B, and ground terminal D
    • Driver door, sedan, base - signal terminal 4, and ground terminal 6
    • Driver door, sedan, uplevel - signal terminal 6, and ground terminal 8
    • Coupe, front passenger - signal terminal C, and ground terminal A
    • Front passenger, Sedan - signal terminal 1, and ground terminal 3
    • Left rear, sedan - signal terminal 4, and ground terminal 6
    • Right rear, sedan - signal terminal 1, and ground terminal 3
    ⇒If not the specified value, replace the appropriate door lock actuator.
  3. Test for less than 2 ohms between the appropriate signal and ground terminals listed below with the switch in the closed position.
    4. • Driver door, coupe - signal terminal B, and ground terminal D
    • Driver door, sedan, base - signal terminal 4, and ground terminal 6
    • Driver door, sedan, uplevel - signal terminal 6, and ground terminal 8
    • Coupe, front passenger - signal terminal C, and ground terminal A
    • Front passenger, Sedan - signal terminal 1, and ground terminal 3
    • Left rear, sedan - signal terminal 4, and ground terminal 6
    • Right rear, sedan - signal terminal 1, and ground terminal 3
    ⇒If greater than the specified range, replace the appropriate door lock actuator.

Door Open Switch Test

  1. Ignition OFF, disconnect the C1 harness connector at the appropriate door lock actuator.
  2. Test for infinite resistance between the appropriate signal and ground terminals listed below with the switch in the open position.
    3. • Driver door, coupe - signal terminal C, and ground terminal D
    • Driver door, sedan, base - signal terminal 5, and ground terminal 6
    • Driver door, sedan, uplevel - signal terminal 7, and ground terminal 8
    • Coupe, front passenger - signal terminal B, and ground terminal A
    • Front passenger, Sedan - signal terminal 2, and ground terminal 3
    • Left rear, sedan - signal terminal 5, and ground terminal 6
    • Right rear, sedan - signal terminal 2, and ground terminal 3
    ⇒If not the specified value, replace the appropriate door lock actuator.
  3. Test for less than 2 ohms between the appropriate signal and ground terminals listed below with the switch in the closed position.
    4. • Driver door, coupe - signal terminal C, and ground terminal D
    • Driver door, sedan, base - signal terminal 5, and ground terminal 6
    • Driver door, sedan, uplevel - signal terminal 7, and ground terminal 8
    • Coupe, front passenger - signal terminal B, and ground terminal A
    • Front passenger, Sedan - signal terminal 2, and ground terminal 3
    • Left rear, sedan - signal terminal 5, and ground terminal 6
    • Right rear, sedan - signal terminal 2, and ground terminal 3
    ⇒If greater than the specified range, replace the appropriate door lock actuator.

Relay Test

  1. Ignition OFF, disconnect the RAP 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 not the specified value, 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 2.0 ohms of resistance between terminals 30 and 87.
    5. ⇒If greater than the specified range, replace the relay.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

    •  Front Side Door Lock Replacement
    •  Rear Door Lock Replacement
    •  Relay Replacement
    •  Control Module References for module replacement, setup, and programming