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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 Eldorado 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 PRNDL Display Inaccurate or Inoperative

PRNDL Display Inaccurate or Inoperative IPC Display

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2
  1. Turn OFF the ignition.
  2. Install a scan tool.
  3. Start the engine.
  4. Place the gear shifter in the following gears:
    5. • PARK
    • REVERSE
    • NEUTRAL
    • DRIVE
  5. Observe the IMS parameter in the powertrain control module (PCM) data display.

Does the scan tool indicate that the IMS parameter is the same as the PRNDL display for all gears?

--

Go to Step 3

Go to Powertrain On Board Diagnostic (OBD) System Check Engine Controls - 4.6L

3

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

--

Go to Step 4

--

4

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2

PRNDL Display Inaccurate or Inoperative Center Console w/D55

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. The resistance values for both circuits should measure OL.

    2.

  2. The resistance values for both circuits should measure approximately 90-120 ohms.

    3.

  3. The resistance values for both circuits should measure OL.

    4.

  4. The resistance values for both circuits should measure approximately 90-120 ohms.

    5.

  5. The resistance values for both circuits should measure approximately 90-120 ohms.

    6.

  6. The resistance values for both circuits should measure OL.

Step

Action

Value(s)

Yes

No

Schematic Reference: Instrument Cluster: Analog Schematics

1

Did you perform the Instrument Cluster Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2
  1. Turn ON the ignition, with the engine OFF.
  2. Shift the transmission through all of the gear positions.
  3. Observe the PRNDL display in the instrument panel cluster (IPC).

Does the IPC PRNDL display the correct transmission gear position for each gear?

--

Go to Step 3

Go to

3

Test the off / run voltage circuit of the electronic PRNDL for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 4

4

Test the ground circuit of the electronic PRNDL 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 17

Go to Step 5

5
  1. Turn OFF the ignition.
  2. Disconnect the electronic PRNDL.
  3. Turn ON the ignition, with the engine OFF.
  4. Set the park brake.
  5. Place the transmission in PARK.
  6. Measure the resistance of the transmission range switch signal A circuit to a good ground.
  7. Measure the resistance of the transmission range switch signal B circuit to a good ground.

Do the resistances for both circuits measure near the specified value?

OL

Go to Step 6

Go to Step 11

6
  1. Measure the resistance of the transmission range switch signal C circuit to a good ground.
  2. Measure the resistance of the transmission range switch signal P circuit to a good ground.

Do the resistances for both circuits measure near the specified value?

90-120ohms

Go to Step 7

Go to Step 12

7
  1. Place the transmission in REVERSE.
  2. Measure the resistance of the transmission range switch signal A circuit to a good ground.
  3. Measure the resistance of the transmission range switch signal P circuit to a good ground.

Do the resistances for both circuits measure near the specified value?

OL

Go to Step 8

Go to Step 11

8
  1. Measure the resistance of the transmission range switch signal B circuit to a good ground.
  2. Measure the resistance of the transmission range switch signal C circuit to a good ground.

Do the resistances for both circuits measure near the specified value?

90-120ohms

Go to Step 9

Go to Step 12

9
  1. Place the transmission in DRIVE.
  2. Measure the resistance of the transmission range switch signal A circuit to a good ground.
  3. Measure the resistance of the transmission range switch signal B circuit to a good ground.

Do the resistances for both circuits measure near the specified value?

90-120ohms

Go to Step 10

Go to Step 12

10
  1. Measure the resistance of the transmission range switch signal C circuit to a good ground.
  2. Measure the resistance of the transmission range switch signal P circuit to a good ground.

Do the resistances for both circuits measure near the specified value?

OL

Go to Step 13

Go to Step 11

11

Test the suspect circuit for a short or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 14

12

Test the suspect circuit for an open, a short or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 14

13

Inspect for poor connections at the harness connector of the electronic PRNDL. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 15

14

Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 16

15

Replace the electronic PRNDL. Refer to Console Front Trim Plate Replacement .

Did you complete the replacement?

--

Go to Step 17

--

16

Replace the IPC. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

--

Go to Step 17

--

17

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2