One Access Panel Inoperative. Chevrolet Express 2003

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 Express 🢒 Body and Accessories 🢒 Keyless Entry 🢒 One Access Panel Inoperative

Circuit Description

Pro/Access models use the key fob to activate up to 3 access panels depending on the cargo door option:

•	One access panel on the right side of all vehicles.

•	One access panel on the left side of vehicles equipped with left side cargo doors.

•	Two access panels on the left side of vehicles not equipped with left side cargo doors.

This vehicle is not equipped with remote keyless entry system (RKE). The keyless entry transmitter and remote control door lock receiver (RCDLR) are used exclusively to operate the access panels. When you press any button on a programmed keyless entry transmitter, the transmitter sends a signal to the RCDLR. The RCDLR sends a class 2 message to the body control module (BCM) which performs the requested access panel function.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

This step tests the primary circuit of the access panel relay.

This step tests if the remote control door lock receiver is receiving and acting on an input from the transmitter.

An open RFA fuse may be caused by a short to ground in the access panel actuator voltage supply circuit or a shorted access panel actuator.

Step	Action	Yes	No
Schematic Reference: Keyless Entry Schematics
1	Did you perform the Diagnostic System Check-Keyless Entry?	Go to Step 2	Go to Diagnostic System Check - Remote Keyless Entry
2	Shut all access panels. Did all the panels stay closed?	Go to Step 3	Go to Step 16
3	Press and release each access panel button on the key fob. Did all the access panels open?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 4
4	Did any of the panels open?	Go to Step 5	Go to All Access Panels Inoperative
5	Place your hand on the suspect access panel relay. Press the button for the inoperative panel on the transmitter. Did the relay click?	Go to Step 11	Go to Step 6
6	With a scan tool, observe the access panel output parameter in the BCM Data List. Press each button on the transmitter one at a time. Does the output state change when each button is pressed?	Go to Step 9	Go to Step 7
7	With a scan tool, observe the key fob information parameter in the remote function actuation data list. Press each access panel button on the transmitter one at a time. Does the scan tool data parameter show that the correct button was pressed?	Go to Step 25	Go to Step 8
8	Important: Inspect that the keyless entry transmitter is the correct model for the vehicle remote system. A wrong model transmitter may pass this test, but will not activate the vehicle remote system. Turn on the J 43241 Keyless Entry Tester. Place the transmitter on the J 43241 test pad. Press each button of the transmitter one at a time. Does a tone sound and the green light illuminate on the J 43241 after the button is pressed?	Go to Step 24	Go to Step 23
9	Disconnect the BCM connector. Connect a test lamp from the BCM connector relay control circuit to a good ground. Does the test lamp illuminate?	Go to Step 22	Go to Step 10
10	Remove the suspect access panel relay. Connect a test lamp between f the suspect access panel relay coil supply circuit and a good ground. Did the test lamp illuminate?	Go to Step 13	Go to Step 14
11	Disconnect the suspect access panel actuator. Connect a test lamp between the actuator supply circuit and a good ground. Press the suspect access panel button on the key fob. Does the test lamp illuminate?	Go to Step 12	Go to Step 15
12	Connect a test lamp between the actuator supply circuit and the ground circuit at the actuator connector. Press the suspect access panel button on the transmitter. Did the test lamp illuminate?	Go to Step 28	Go to Step 18
13	Test the suspect access panel relay control circuit for an open. Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 29	Go to Step 21
14	Test the suspect access panel relay coil supply circuit for an open. Did you find and correct the condition?	Go to Step 29	--
15	Test the suspect access panel actuator supply voltage circuit for an open. Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 29	Go to Step 21
16	Remove the suspect access panel relay. Close the suspect access panel. Did the suspect access panel stay closed?	Go to Step 17	Go to Step 19
17	Test the relay control circuit of the suspect access panel for a short to ground. Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Did you find and repair the concern?	Go to Step 29	Go to Step 27
18	Test the suspect access panel ground circuit for an open or high resistance. Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Did you find and repair the concern?	Go to Step 29	Go to Step 20
19	Test the suspect access panel actuator supply voltage circuit for a short to voltage. Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 29	--
20	Inspect for poor connections at the suspect access panel actuator connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and repair the concern?	Go to Step 29	Go to Step 28
21	Inspect for poor connections at the suspect access panel relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and repair the concern?	Go to Step 29	Go to Step 27
22	Inspect for poor connections at the harness connector of the body control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 29	Go to Step 25
23	Replace the transmitter. Did you complete the replacement?	Go to Step 24	--
24	Perform the transmitter programming procedure. Refer to Transmitter Programming . Did the scan tool indicate that the transmitter programmed properly?	Go to Step 29	Go to Step 26
25	Replace the body control module. Refer to Body Control Module Replacement . Did you complete the replacement?	Go to Step 29	--
26	Replace the remote control door lock receiver (RCDLR). Refer to Remote Control Door Lock Receiver Replacement . Did you complete the replacement?	Go to Step 29	--
27	Replace the access panel relay. Did you complete the replacement?	Go to Step 29	--
28	Replace the access panel actuator. Did you complete the replacement?	Go to Step 29	--
29	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2