All Gauges Inoperative

ALL GAUGES INOPERATIVE

All Gauges Inoperative:

POSSIBLE CAUSES
- No response - PCI BUS
- No response - PCI BUS - powertrain control module
- PCI BUS - instrument cluster
- (F21) Fused ignition switch output (run/start) circuit short to ground
- (F1) Fused ignition switch output (off/run/start) circuit short to ground
- (F21) Fused ignition switch output (run/start) circuit open
- (F1) Fused ignition switch output (off/run/start) circuit open
- (Z18) Instrument cluster ground circuit for an open
- Instrument cluster

DIAGNOSTIC TEST

1. NO RESPONSE - PCI BUS

NOTE: Diagnose and repair any MIC, PCM (ECM if diesel equipped), or Communication DTCs before proceeding with this test.

Turn the ignition on.
With the DRBIII(R), select System Monitors, then J1850 Module Scan.

Q: Does the DRBIII(R) display MIC PRESENT on the BUS?

YES: Go To 2
NO: Refer to the COMMUNICATION category and perform the appropriate symptom. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. NO RESPONSE - PCI BUS - POWERTRAIN CONTROL MODULE
Turn the ignition on.
With the DRBIII(R), select Body, MIC, SYSTEM TESTS, PCM Monitor.

Q: Does the DRBIII(R) display PCM INACTIVE on the BUS?

YES: Refer to the COMMUNICATION category and perform the appropriate symptom. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 3

3. PCI BUS - INSTRUMENT CLUSTER
Turn the ignition on.
With the DRBIII(R), select Body, MIC, MODULE DISPLAY.

Q: Does the DRBIII(R) display NO RESPONSE from MIC?

YES: Refer to the COMMUNICATION category and perform the appropriate symptom. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4

4. CHECK THE (F21) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT FOR A SHORT TO GROUND




Turn the ignition off.
Inspect the #20 Fuse in the PDC.
If the fuse is open, replace with proper rated fuse.
Turn the ignition on for one minute.
Turn the ignition off.
Inspect the #20 Fuse in the PDC.

Q: Is the fuse open?

YES: Repair the (F21) Fused Ignition Switch Output (Unlock/Run) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 5

5. CHECK THE (F1) FUSED IGNITION SWITCH OUTPUT (OFF/RUN/START) CIRCUIT FOR A SHORT TO GROUND




Turn the ignition off.
Remove and inspect the #29 Fuse in the PDC.
If the fuse is open, replace with the proper rated fuse.
Turn the ignition on for 1 minute.
Turn the ignition off.
Remove and inspect the #29 Fuse in the PDC.

Q: Is the fuse open?

YES: Repair the (F1) Fused Ignition Switch Output (Run/Start) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 6

6. CHECK THE (F21) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT FOR AN OPEN




Turn the ignition off.
Disconnect the Instrument Cluster C3 harness connector.
Turn the ignition on.
Measure the voltage between the (F21) Fused Ignition Switch Output (Run/Start) circuit and ground.

Q: Is the voltage below 10.5 volts?

YES: Repair the (F21) Fused Ignition Switch Output (Run/Start) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 7

7. CHECK THE (F1) FUSED IGNITION SWITCH OUTPUT (OFF/RUN/START) CIRCUIT FOR AN OPEN




Turn the ignition off.
Disconnect the Instrument Cluster C3 harness connector.
Turn the ignition on.
Measure the voltage between the (F1) Fused Ignition Switch Output (Off/Run/Start) circuit and ground.

Q: Is the voltage below 10.5 volts?

YES: Repair the (F1) Fused Ignition Switch Output (Off/Run/ Start) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 8

8. CHECK THE (Z18) INSTRUMENT CLUSTER GROUND CIRCUIT FOR AN OPEN




Turn the ignition off.
Disconnect the Instrument Cluster C3 harness connector.
Measure the resistance between ground and the (Z18) Instrument Cluster Ground circuit.

Q: Is the resistance below 5.0 ohms?

YES: Replace and configure the Instrument Cluster. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (Z18) Instrument Cluster Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test