All Gauges Inoperative

ALL GAUGES INOPERATIVE

All Gauges Inoperative:

POSSIBLE CAUSES
- No response - PCI BUS
- No response - PCI BUS - powertrain control module
- No response - PCI BUS - instrument cluster
- (F942) fused ignition switch output circuit short to ground
- (Z18) instrument cluster ground circuit open
- (F942) fused ignition switch output circuit open
- Instrument cluster

DIAGNOSTIC TEST

1. NO RESPONSE - PCI BUS
Turn the ignition on.
With the scan tool, select System Monitors, then J1850 Module Scan.

Q: Does the scan tool 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 scan tool, select Body, MIC, SYSTEM TESTS, PCM Monitor.

Q: Does the scan tool display: PCM INACTIVE on the BUS?

YES: Refer to the symptom list for problems related to NO RESPONSE FROM THE POWERTRAIN CONTROL MODULE.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 3

3. NO RESPONSE - PCI BUS - INSTRUMENT CLUSTER
Turn the ignition on.
With the scan tool, select Body, MIC, MODULE DISPLAY.

Q: Does the scan tool display: NO RESPONSE from MIC?

YES: Refer to the symptom list for problems related to NO RESPONSE FROM THE INSTRUMENT CLUSTER.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4

4. (F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND
Turn the ignition off.
Inspect the #13 Fuse in the Junction Block.
If the fuse is open, replace with proper rated fuse.
Turn the ignition on for one minute.
Turn the ignition off.
Inspect the #13 Fuse in the Junction Block.

Q: Is the fuse open?

YES: Repair the (F942) Fused Ignition Switch Output circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 5

5. (F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN




Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Turn the ignition on.
Measure the voltage between the (F942) Fused Ignition Switch Output circuit and ground.

Q: Is the voltage above 10.5 volts?

YES: Go To 6
NO: Repair the (F942) Fused Ignition Switch Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

6. (Z18) INSTRUMENT CLUSTER GROUND CIRCUIT OPEN




Turn the ignition off.
Disconnect the Instrument Cluster 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 (Z18) the Instrument Cluster Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test