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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1538 (Engine Controls Diagnostic (DTC P0491 To DTC P2130) -- 5.7L) >> Diagnosis >> DTC P2130 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 26:  When the TAC module detects a condition within the TAC system, more than 1 TAC system related DTC may set. This is due to the many redundant tests that run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Disconnecting the components during testing may set additional DTCs. Keep this in mind when reviewing the Capture Info.
DTC P2130

Step Action Values Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View References:  Powertrain Control Module (PCM) Connector End Views  , or  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check-Engine Controls? - Go to Step 2  Go to Diagnostic System Check - Engine Controls
2
IMPORTANT: If DTC P1518 or P0220 is also set, refer to Diagnostic Trouble Code (DTC) List for further diagnosis.
  1. Turn ON the ignition, with the engine OFF.
  2. Observe the accelerator pedal position (APP) sensor 3 voltage parameter.
Does the scan tool indicate APP sensor 3 voltage within the specified values?		 3.29-4.28 V Go to Step 3  Go to Step 6 
3 Fully depress the accelerator pedal to the wide open throttle (WOT) position.
Does the scan tool indicate APP sensor 3 voltage within the specified values?		 1.63-3.1 V Go to Step 4  Go to Step 6 
4
  1. Turn OFF the ignition for 15 seconds.
  2. Turn ON the ignition, with the engine OFF.
  3. Observe the DTC Info with a scan tool.
  4. Lightly touch and move the related engine wiring harnesses and connectors for the accelerator pedal position (APP) sensor while monitoring the DTC info status.
Did this DTC fail this ignition during the above test?		 - Go to Step 20  Go to Step 5 
5 Slowly depress the accelerator pedal to WOT. Slowly return the accelerator pedal to the released position.
Did this DTC fail this ignition during the above test?		 - Go to Step 21  Go to Diagnostic Aids
6
  1. Disconnect the APP sensor harness connector.
  2. Test the APP sensor 3 signal circuit for voltage, with a DMM.
Does the DMM indicate APP sensor 3 signal voltage within the specified values?		 3.94-6.06 V Go to Step 11  Go to Step 7 
7
  1. Turn OFF the ignition.
  2. Disconnect the throttle actuator control (TAC) module harness connector containing the APP Sensor circuits.
  3. Turn ON the ignition, with the engine OFF.
  4. Test the APP sensor 3 signal circuit for a short to voltage, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 8 
8 Test the APP sensor 3 signal circuit for an open or for high resistance, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 9 
9 Test the APP sensor 3 signal circuit for a short to ground, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 10 
10
  1. Disconnect the other TAC module harness connector.
  2. Test for a short between the APP sensor 3 signal circuit and all other TAC module circuits, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 23 
11 Test the APP sensor 3 5-volt reference circuit for voltage, with a DMM.
Does the DMM indicate voltage within the specified values?		 3.94-6.06 V Go to Step 16  Go to Step 12 
12
  1. Turn OFF the ignition.
  2. Disconnect the TAC module harness connector containing the APP Sensor circuits.
  3. Turn ON the ignition, with the engine OFF.
  4. Test the APP sensor 3 5-volt reference circuit for a short to voltage, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 13 
13 Test the APP sensor 3 5-volt reference circuit for an open or for high resistance, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 14 
14 Test the APP sensor 3 5-volt reference circuit for a short to ground, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 15 
15 Test for a short between the APP sensor 3 5-volt reference circuit and all other TAC module circuits, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 23 
16 With a DMM connected between the APP sensor 3 low reference circuit and the APP sensor 1 low reference circuit, measure the resistance.
Does the DMM indicate resistance within the specified values?		 0-5 ohm Go to Step 18  Go to Step 17 
17
  1. Turn OFF the ignition.
  2. Disconnect the TAC module harness connector containing the APP sensor circuits.
  3. Test the APP sensor 3 low reference circuit for an open or for high resistance, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 23 
18
  1. Observe the APP sensor 3 voltage parameter, with a scan tool.
  2. Connect a fused jumper between the APP sensor 3 signal circuit and the APP sensor 3 low reference circuit at the APP sensor harness connector.
Does the scan tool indicate APP sensor 3 voltage at the specified value?		 0 V Go to Step 19  Go to Step 24 
19
  1. Turn OFF the ignition.
  2. Disconnect the TAC module harness connectors.
  3. Test for a short between the APP sensor 3 signal circuit and all other TAC module circuits, with a DMM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 21 
20 Repair the intermittent connection as necessary. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 25  -
21 Inspect for poor connections at the harness connector of the APP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Repairing Connector Terminals in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 22 
22 Replace the APP sensor assembly. Refer to Accelerator Pedal Position (APP) Sensor Replacement .
Did you complete the replacement?		 - Go to Step 25  -
23 Inspect for poor connections at the harness connector of the TAC module. Refer to Testing for Intermittent Conditions and Poor Connections and Repairing Connector Terminals in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 25  Go to Step 24 
24 Replace the TAC module. Refer to Throttle Actuator Control (TAC) Module Replacement .
Did you complete the replacement?		 - Go to Step 25  -
25
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze/Frame Failure Records.
Does the DTC run and pass?		 - Go to Step 26  Go to Step 2 
26  Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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