GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Avalanche - 4WD 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Adjustable Pedals Inoperative

Step

Action

Values

Yes

No

Schematic Reference: Adjustable Pedal Schematics

Connector End View Reference: Adjustable Pedal Connector End Views or Power Door Systems Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

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Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Verify the fault is present.

Does the system operate normally?

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Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3
  1. Install a scan tool.
  2. Observe the Pedal Forward Switch and the Pedal Aft Switch parameters in the driver door module (DDM) Inputs data list.
  3. Operate the electronic adjustable pedals (EAP) switch in both directions.

Does the scan tool display the Correct Switch Status parameter in relation to the actual switch position?

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Go to Step 4

Go to Step 10

4
  1. Disconnect the EAP motor connector.
  2. Connect a test lamp across the motor control circuit terminals in the harness connector.
  3. Operate the EAP switch in both directions.

Does the test lamp illuminate when the switch is operated in both directions?

--

Go to Step 18

Go to Step 5

5
  1. Disconnect the EAP relay.
  2. Test the EAP motor control circuits for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 26

Go to Step 6

6

Connect a test lamp from the battery voltage supply circuit terminal in the EAP relay connector to ground.

Does the test lamp illuminate?

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Go to Step 7

Go to Step 17

7
  1. Connect a test lamp from battery voltage to the EAP relay low side control circuit terminal in the harness connector.
  2. Operate the EAP switch in both directions.

Does the test lamp illuminate when the switch is operated in both directions?

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Go to Step 8

Go to Step 14

8
  1. Connect a test lamp from the EAP relay forward control circuit terminal in the harness connector to ground.
  2. Operate the EAP switch in the forward direction.

Does the test lamp illuminate?

--

Go to Step 9

Go to Step 15

9
  1. Connect a test lamp from the EAP relay rearward control circuit terminal in the harness connector to ground.
  2. Operate the EAP switch in the rearward direction.

Does the test lamp illuminate?

--

Go to Step 20

Go to Step 16

10
  1. Disconnect the DDM connector C5.
  2. Test the resistance from the switch supply voltage circuit terminal to the EAP forward switch signal circuit terminal in the DDM harness connector.
  3. Operate the EAP switch in the forward direction.

Is the resistance at or near the specified value?

806 ohms

Go to Step 11

Go to Step 12

11
  1. Test the resistance from the switch supply voltage circuit terminal to the EAP rearward switch signal circuit terminal in the DDM harness connector.
  2. Operate the EAP switch in the rearward direction.

Is the resistance at or near the specified value?

806 ohms

Go to Step 24

Go to Step 13

12

Test the EAP forward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 26

Go to Step 22

13

Test the EAP rearward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 26

Go to Step 22

14

Test the EAP relay low side control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 26

Go to Step 24

15

Test the EAP relay forward control circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 26

Go to Step 24

16

Test the EAP relay rearward control circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 26

Go to Step 24

17

Repair the EAP relay battery voltage supply circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 26

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18

Inspect for poor connections at the EAP motor. 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 26

Go to Step 19

19

Replace the EAP motor.

Is the repair complete?

--

Go to Step 26

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20

Inspect for poor connections at the EAP relay. 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 26

Go to Step 21

21

Replace the EAP relay.

Is the repair complete?

--

Go to Step 26

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22

Inspect for poor connections at the EAP switch. 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 26

Go to Step 23

23

Replace the EAP switch.

Is the repair complete?

--

Go to Step 26

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24

Inspect for poor connections at the DDM. 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 26

Go to Step 25

25

Replace the DDM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Is the repair complete?

--

Go to Step 26

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26

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3