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INSTRUMENT CLUSTER
Symptom:
NAV SWITCH INPUT CIRCUIT SHORT
When Monitored and Set Condition:
NAV SWITCH INPUT CIRCUIT SHORT
When Monitored: The MIC power-up diagnostics will test the NAV Button A/D port for
either an open circuit, short to power or ground, or a stuck button exists.
Set Condition: The Instrument Cluster detects excessive current on the NAV Mux Signal
circuit. The MIC will suspend operation of the NAV System until the fault is cleared.
INSTRUMENT PANEL SWITCH POD FAULT
NAV MUX SIGNAL CIRCUIT SHORT TO RETURN CIRCUIT
NAV MUX SIGNAL CIRCUIT SHORT TO GROUND
INSTRUMENT CLUSTER
TEST
1
With the DRBIII , erase DTCs.
Turn the ignition off.
Disconnect the Instrument Cluster Panel Pod harness connector.
Turn the ignition on, with the DRBIII , read DTCs.
Does the DRBIII display NAV Switch Input Open ?
Yes → Replace the Instrument Panel Switch Pod in accordance with the
→ Go To 2
No
2
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Disconnect the Instrument Panel Switch Pod harness connector.
Measure the resistance between the NAV Mux Signal circuit and the EVIC/NAV Mux
Return circuit.
Is the resistance below 100.0 ohms?
Yes → Repair the NAV Mux Signal circuit for a short to the EVIC/NAV
→ Go To 3
No
POSSIBLE CAUSES
ACTION
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Mux Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
638
APPLICABILITY
All
All
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