Chrysler PT Cruiser. Manual — part 56
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Symptom:
PANEL DIMMER SHORTED
When Monitored and Set Condition:
PANEL DIMMER SHORTED
When Monitored:
When the Instrument Cluster detects voltage at the Headlamp Switch
Output circuit.
Set Condition:
The Instrument Cluster detects Panel Dimmer resistance is less than 20
ohms for 5 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
PANEL LAMPS DIMMER SIGNAL CIRCUIT SHORT TO GROUND
MULTI-FUNCTION SWITCH
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display 9Panel Dimmer Shorted9?
All
Yes
→ Go To 2
No
→ The condition is not present at this time. Monitor DRBIIIt
parameters while wiggling the related wire harness. Refer to any
Technical Service Bulletins (TSB) that may apply. Visually in-
spect the related wiring harness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Multi- Function Switch harness connector.
Disconnect the Instrument Cluster C2 harness connector.
Measure the resistance between ground and the Panel Lamps Dimmer Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Panel Lamps Dimmer Signal circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
211
INSTRUMENT CLUSTER
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TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Multi- Function Switch harness connector.
Measure the resistance of the Panel Lamps Dimmer circuit between the Signal
circuit terminal pin and the Ground circuit terminal pin of the Multi- Function
Switch.
Is the resistance below 80 ohms?
All
Yes
→ Replace the Multi-Function Switch in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
212
INSTRUMENT CLUSTER
PANEL DIMMER SHORTED —
Continued
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Symptom:
*ALL GAUGES INOPERATIVE
POSSIBLE CAUSES
NO RESPONSE - PCI BUS
NO RESPONSE - PCI BUS - POWERTRAIN CONTROL MODULE
NO RESPONSE - PCI BUS - INSTRUMENT CLUSTER
IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND
IGNITION SWITCH OUTPUT CIRCUIT OPEN
INSTRUMENT CLUSTER GROUND CIRCUIT OPEN
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, select System Monitors, then J1850 Module Scan.
Does the DRBIII
t display MIC PRESENT on the BUS?
All
Yes
→ Go To 2
No
→ Refer to the COMMUNICATION category and perform the appro-
priate symptom.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition on.
With the DRBIII
t, select Body, MIC, SYSTEM TESTS, PCM Monitor.
Does the DRBIII
t display PCM INACTIVE ON THE BUS?
All
Yes
→ Refer to the symptom list for problems related to *NO RE-
SPONSE FROM THE POWERTRAIN CONTROL MODULE.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition on.
With the DRBIII
t, select Body, MIC, MODULE DISPLAY.
Does the DRBIII
t display NO RESPONSE from MIC?
All
Yes
→ Refer to the symptom list for problems related to *NO RE-
SPONSE FROM THE INSTRUMENT CLUSTER.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off.
Inspect the #10 Fuse in the Fuse Block (#11 Fuse BUX vehicles).
If the fuse is open, replace with proper rated fuse.
Turn the ignition on for one minute.
Turn the ignition off.
Inspect the #10 Fuse in the Fuse Block (#11 Fuse BUX vehicles).
Is the fuse open?
All
Yes
→ Repair the Ignition Switch Output circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 5
213
INSTRUMENT CLUSTER
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TEST
ACTION
APPLICABILITY
5
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Turn the ignition on.
Measure the voltage between the Ignition Switch Output circuit and ground.
Is the voltage above 10.5 volts?
All
Yes
→ Go To 6
No
→ Repair the Ignition Switch Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Measure the resistance between ground and the Instrument Cluster Ground circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Instrument Cluster Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
214
INSTRUMENT CLUSTER
*ALL GAUGES INOPERATIVE —
Continued
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