DTC P1128 - Acceleration Pedal 1 Sensor Circuit High
Conditions for setting dtc P1128
| ￭ | Engine Running |
| ￭ | Acceleration Pedal 1 Sensor ≥ 4.9 volts |
| ￭ | The above must be present for a period of 128 instances/cycles or greater to trigger DTC P1128 |
|
Step |
Action |
Value (s) |
YES |
NO |
|
1 |
- Key ON, Engine OFF - Within VCM Live, open the Accel Pedal 1 sensor DTC Maximum parameter, does the Accel Pedal 1 sensor parameter display 4.9 volts or greater? |
≥ 4.9 volts |
Go to Step 2 |
Intermittent Issue (Refer to Intermittent Diagnostics) |
|
2 |
- Slowly increase the acceleration pedal while observing the Accel Pedal 1 sensor voltage - Does the parameter ever display 4.9 volts or greater? |
≥ 4.9 volts |
Go to Step 3 |
Intermittent Issue (Refer to Intermittent Diagnostics) |
|
3 |
- Disconnect the APP sensor connector and the ECU connector "D" - Check for continuity between the APP sensor connector cavity "B" and ECU connector "D" pin 20 - Do you have continuity between them? |
|
Go to Step 4 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced |
|
4 |
- Disconnect the APP sensor connector and the ECU connector "C" - Check for continuity between the APP sensor signal connector cavity "E" and ECU connector "C" pin 11 - Do you have continuity between them? |
|
Go to Step 5 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced |
|
5 |
- Disconnect the APP sensor connector and the ECU connector "C" & "D" - Check for continuity between both APP sensor 5 volt reference connector cavity "C" & "D" and ECU connector "C" pin 11 & Connector "D" pin 11 - Do you have continuity between them? |
|
Go to Step 6 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced |
|
6 |
- Inspect all pins and terminals for any corrosion, physical damage, and contaimination - Any issues found? |
|
Repair any pins or terminals that have been damaged. |
Go to Step 7 |
|
7 |
- Replace the ACC Pedal 1 Sensor - Is the replacement complete? |
|
Go to Step 8 |
N/A |
|
8 |
- Clear any DTC from the ECU - Turn the ignition off and wait 30 seconds - Start the engine and operate the engine to full operating temperature - Observe the Check Engine Light on the Menu bar in VCM Live - After operating the engine within the test parameters, check for any store codes - Does the engine operate without any stored DTC's? |
|
System is now operational and ready to be tuned |
Contact HP Tuners Support |
Table 35. Acceleration Pedal 1 Sensor Circuit High Diagnostics Table
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Figure 14. Drive-By-Wire Acceleration Pedal Sensor Cavity Connector Location
