Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 1: The Diagnostic System Check - Vehicle prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
- 5: This step tests the signal and the 5-volt reference circuits.
- 9: This step tests for an open in the APP sensor 1 low reference circuit. The control module will receive a high voltage signal if the low reference circuit is open.
DTC P2120
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
0.2 V | Go to Step 5 | Go to Step 3 |
| 3 | Is the APP sensor 1 parameter more than the specified value? | 4.8 V | Go to Step 9 | Go to Step 4 |
| 4 |
|
- | Go to Step 5 | Go to Intermittent Conditions |
| 5 |
|
4.8-5.2 V | Go to Step 12 | Go to Step 6 |
| 6 | Connect a DMM between the 5-volt reference circuit of the APP sensor 1 and a good ground. Is the measured voltage within the specified range? |
4.8-5.2 V | Go to Step 7 | Go to Step 8 |
| 7 | Test the APP sensor 1 signal circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 8 | Test the 5-volt reference circuit of the APP sensor 1 for an open circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 9 |
|
- | Go to Step 10 | Go to Step 11 |
| 10 | Test the input circuit of the APP sensor 1 for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 15 |
| 11 | Test for an open in the low reference circuit of the APP sensor 1. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 12 | Test for an intermittent and for a poor connection at the APP sensor 1. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 14 |
| 13 | Test for an intermittent and for a poor connection at the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 15 |
| 14 | Replace the APP sensor 1. Refer to Accelerator Pedal Position Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 16 | - |
| 15 | Replace the PCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 16 | - |
| 16 |
|
- | Go to Step 2 | Go to Step 17 |
| 17 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? |
- | Go to Diagnostic Trouble Code (DTC) List - Vehicle | System OK |