Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the instrument panel cluster
(IPC) system check performed?
| --
|
Go to Step
2
| Go to
Instrument Cluster System Check
|
2
|
- Properly support the vehicle so that the wheels are off the ground.
- With the scan tool select Powertrain, Engine Data, and Data to
monitor the vehicle speed.
- Start the engine, transmission in gear, wheels spinning.
- Compare the vehicle speed on the scan tool to the speed displayed
on the speedometer.
Does the scan tool agree with the speedometer?
| --
| Go to
Powertrain On Board Diagnostic (OBD) System Check
in 4.3L
or
Powertrain On Board Diagnostic (OBD) System Check
for 4.8L, 5.3L, and 6.0L
|
Go to Step
3
|
3
|
- Check for a speed input signal to the cluster by backprobing with
a DMM.
- Measure the AC voltage between the DK GRN/WHT (817) wire cavity
A3 and ground.
Is the AC voltage within the specified range?
| 2-6.5 VAC (approximately 2-10 MPH)
|
Go to Step 4
|
Go to Step 5
|
4
| Replace the instrument cluster.
Refer to
Instrument Cluster Replacement
.
Is the repair complete?
| --
| Go to
Instrument Cluster System Check
| --
|
5
| Check the following items:
- The DK GRN/WHT (817) wire for an open circuit between the cluster
to the VCM/PCM.
- The DK GRN/WHT (817) wire for a short to ground between the cluster
to the VCM/PCM.
- The DK GRN/WHT (817) wire for a short to battery between the
cluster to the VCM/PCM.
- All electrical connectors for proper matting.
- Repair any problem found.
Was a problem found and corrected?
| --
| Go to
Instrument Cluster System Check
| Go to
Instrument Cluster System Check
|
