Step
| Action
| Values
| Yes
| No
|
Schematic Reference:
Engine Controls Schematics
Connector End View Reference:
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 any other DTCs are set, diagnose those DTCs first.
- Turn ON the ignition, with the engine OFF.
- Observe the TP sensor angle parameter on the scan tool while slowly opening
the throttle to wide open throttle (WOT).
- Closed throttle value is the first value.
- Wide open throttle (WOT) value is above the second value.
Does the TP Angle increase steadily and evenly from the Closed Throttle value
to above the Wide Open Throttle value?
| 0%
98%
| Go to
Step 3
| Go to
Step 4
|
3
|
- Observe the Freeze Frame/Failure Records data for this DTC.
- Turn OFF the ignition for 30 seconds.
- Start the engine.
- 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.
Did the DTC fail this ignition?
| --
| Go to
Step 4
| Go to Diagnostic Aids
|
4
|
- Turn OFF the ignition.
- Disconnect the TP sensor harness connector.
- Turn ON the ignition, with the engine OFF.
- With a scan tool, observe the TP sensor voltage parameter.
Does the scan tool indicate TP sensor voltage at the specified value?
| 0 V
| Go to
Step 5
| Go to
Step 6
|
5
|
- Turn OFF the ignition.
- Connect a fused jumper wire between the 5-volt reference circuit and the
signal circuit at the TP sensor harness connector.
- Turn ON the ignition, with the engine OFF.
- With a scan tool, observe the TP sensor voltage parameter.
Does the scan tool indicate TP sensor voltage at the specified value?
| 5 V
| Go to
Step 9
| Go to
Step 7
|
6
| Test the signal circuit of the TP sensor for a short to voltage. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems .
Did you find and correct the condition?
| --
| Go to
Step 15
| Go to
Step 13
|
7
| Test the 5-volt reference circuit of the TP sensor 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 15
| Go to
Step 8
|
8
| Test the signal circuitof the TP sensor 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 15
| Go to
Step 12
|
9
| Test the low reference circuit of the TP sensor 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 15
| Go to
Step 10
|
10
| Test the 5-volt reference circuit of the TP sensor for a high resistance. Refer
to
Circuit Testing
and
Wiring Repairs
in Wiring Systems.
Did you find and correct the condition?
| --
| Go to
Step 15
| Go to
Step 11
|
11
| Test for an intermittent and for a poor connection at the TP sensor
harness connector. Refer to
Testing for Intermittent and Poor Connections
and
Connector Repairs
in
Wiring Systems.
Did you find and correct the condition?
| --
| Go to
Step 15
| Go to
Step 13
|
12
| Test for an intermittent and for a poor connection at the PCM harness connector.
Refer to
Testing for Intermittent and Poor Connections
and
Connector Repairs
in Wiring
Systems.
Did you find and correct the condition?
| --
| Go to
Step 15
| Go to
Step 14
|
13
| Replace the TP sensor. Refer to
Throttle Position (TP) Sensor Replacement
.
Did you complete the replacement?
| --
| Go to
Step 15
| --
|
14
| Replace the PCM. Refer to
Powertrain Control Module (PCM) Replacement
.
Did you complete the replacement?
| --
| Go to
Step 15
| --
|
15
|
- Clear the DTCs with a scan tool.
- Turn OFF the ignition for 30 seconds.
- Start the engine.
- 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.
Did the DTC fail this ignition?
| --
| Go to
Step 2
| Go to
Step 16
|
16
| Observe the Capture Info with a scan tool.
Are there any DTCs that you have not diagnosed?
| --
| Go to
Diagnostic Trouble Code (DTC) List
| System OK
|
