For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Instrument Cluster System Check? | -- | Go to Step 2 | Go to Instrument Cluster System Check
2 |

1. Disconnect the PCM connector C1.
2. Connect a signal generator I/P test J 33431-C to PCM connector C1, terminal 55.
3. Connect J 33431-C ground terminal to a good chassis ground.
4. Set the signal generator I/P tester J 33431-C to 54 mph.
5. Turn the ignition switch to RUN.

Does the speedometer read the specified value?

54 mph

Go to Step 4

Go to Step 3

3 | Inspect CKT 817 (DK GRN/WHT) for the following conditions:

1. A short to ground
2. A short to voltage
3. An open

Is CKT 817 OK?

--

Go to Step 6

Go to Step 5

4 |

1. Inspect for a poor connection at the PCM connector C1, terminal 55.
2. If the terminal contact is OK, refer to Engine Controls.

Did you find and correct the condition?

--

Go to Instrument Cluster System Check

--

5 | Repair CKT 817 (DK GRN/WHT). Refer to Repairing Damaged Wire Insulation in Wiring Systems. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
6 |

1. Inspect for a poor connection at the instrument cluster vehicle speed input terminal.
2. If the terminal is OK, replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the replacement complete?

--

Go to Instrument Cluster System Check

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