Step
| Action
| Value
| Yes
| No
|
Schematic Reference:
Engine Controls Schematics
|
1
| Did you perform the Diagnostic System Check-Engine Controls?
| --
| Go to
Step 2
| Go to
Diagnostic System Check - Engine Controls
|
2
|
- Observe the Freeze Frame/Failure Records for this DTC.
- Turn OFF the ignition for 30 seconds.
- Start the engine.
- In order to operate the vehicle under the conditions which set
the DTC, use the following information:
- The data in the Freeze Frame/Failure Records
- The parameters listed in the Conditions for Running in the DTC
Does the DTC fail this ignition?
| --
| Go to
Step 3
| Go to
Intermittent Conditions
|
3
|
- Turn OFF the engine.
- Disconnect the respective electrical connector of the ignition
coil.
- Start the engine.
- Connect the DMM, select the DC Hertz setting in order to measure
the frequency at the respective IC signal circuit. Refer to
Measuring Frequency
in Wiring Systems.
Does the frequency measure within the range that is specified?
| 3-20 Hz
| Go to
Step 7
| Go to
Step 4
|
4
| Measure the voltage at the respective IC signal circuit using the DMM.
Is the signal circuit voltage more than the specified value?
| 1 V
| Go to
Step 13
| Go to
Step 5
|
5
|
- Turn OFF the ignition.
- Disconnect the PCM connector. Refer to
Powertrain Control Module (PCM) Replacement
.
- Connect the DMM in order to test the continuity from the respective
ignition control circuit, at the ignition coil electrical connector, to the
PCM connector. Refer to
Testing for Continuity
in Wiring Systems.
Does the DMM indicate continuity?
| --
| Go to
Step 6
| Go to
Step 14
|
6
| Test the respective ignition control circuit for a short to ground. Refer
to
Testing for Continuity
in Wiring Systems.
Did you find and correct the condition?
| --
| Go to
Step 17
| Go to
Step 15
|
7
|
- Turn ON the ignition, with the engine OFF.
- Connect a test lamp to the battery ground in order to probe the
Ignition 1 voltage circuit of the IC. Refer to
Troubleshooting with a Test Lamp
and to
Probing Electrical Connectors
in Wiring Systems.
Does the test lamp illuminate?
| --
| Go to
Step 8
| Go to
Step 9
|
8
| Connect a test lamp to B+ in order to probe the ground circuit of the Ignition
Coil. Refer to
Troubleshooting with a Test Lamp
and to
Probing Electrical Connectors
in Wiring Systems.
Does the test lamp illuminate?
| --
| Go to
Step 11
| Go to
Step 10
|
9
| Repair the open in the ignition 1 voltage circuit. Refer to
Wiring Repairs
in Wiring Systems.
Did you complete the repair?
| --
| Go to
Step 17
| --
|
10
| Repair the open in the ground circuit for the IC. Refer to
Wiring Repairs
in Wiring Systems.
Did you complete the repair?
| --
| Go to
Step 17
| --
|
11
| Inspect for poor connections at the IC harness connector. Refer to
Testing for Intermittent and Poor Connections
and to
Connector Repairs
in Wiring Systems.
Did you find and correct the condition?
| --
| Go to
Step 17
| Go to
Step 12
|
12
| Replace the ignition coil. Refer to
Ignition Coil(s) Replacement
.
Did you complete the replacement?
| --
| Go to
Step 17
| --
|
13
| Repair the IC circuit for a short to voltage. Refer to
Wiring Repairs
in Wiring Systems.
Did you complete the repair?
| --
| Go to
Step 17
| --
|
14
| Repair the IC circuit for an open circuit. Refer to
Wiring Repairs
in Wiring Systems.
Did you complete the repair?
| --
| Go to
Step 17
| --
|
15
| Inspect for poor connections at the PCM harness connector. Refer to
Testing for Intermittent and Poor Connections
and to
Connector Repairs
in Wiring Systems.
Did you find and correct the condition?
| --
| Go to
Step 17
| Go to
Step 16
|
16
| Replace the PCM. Refer to
Powertrain Control Module (PCM) Replacement
.
Did you complete the replacement?
| --
| Go to
Step 17
| --
|
17
|
- Use a scan tool in order to clear the DTCs.
- Turn OFF the ignition for 30 seconds.
- Start the engine.
- Operate the vehicle within the Conditions for Running the DTC,
as specified in the supporting text.
Does the DTC run and pass?
| --
| Go to
Step 18
| Go to
Step 2
|
18
| Use a scan tool in order to observe the stored information in Capture Info.
Does the scan tool display any DTCs that you have not diagnosed?
| --
| Go to
Diagnostic Trouble Code (DTC) List
| System OK
|
