Chrysler Pacifica. Manual — part 181
Symptom:
NAV SWITCH INPUT CIRCUIT OPEN
When Monitored and Set Condition:
NAV SWITCH INPUT CIRCUIT OPEN
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 no feedback on the NAV Switch Sense
circuit. The MIC will suspend operation of the NAV System until the fault is cleared.
POSSIBLE CAUSES
EVIC/NAV MUX RETURN CIRCUIT OPEN
INSTRUMENT PANEL SWITCH POD FAULT
NAV MUX SIGNAL CIRCUIT OPEN
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Disconnect the Instrument Cluster Switch Pod harness connector.
Measure the resistance of the EVIC/NAV Mux Return circuit.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the EVIC/NAV Mux Return circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition off.
Reconnect the Instrument Cluster C1 harness connector.
Disconnect the Instrument Panel Switch Pod harness connector.
Turn the ignition on.
Measure the voltage between the NAV Switch Sense circuit and ground.
Is the voltage below 4.5 volts?
All
Yes
→ Go To 3
No
→ Replace the Instrument Panel Switch Pod in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
721
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Disconnect the Instrument Panel Switch Pod harness connector.
Measure the resistance of the NAV Mux Signal circuit.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the NAV Mux Signal circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
722
INSTRUMENT CLUSTER
NAV SWITCH INPUT CIRCUIT OPEN —
Continued
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.
POSSIBLE CAUSES
INSTRUMENT PANEL SWITCH POD FAULT
NAV MUX SIGNAL CIRCUIT SHORT TO RETURN CIRCUIT
NAV MUX SIGNAL CIRCUIT SHORT TO GROUND
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, erase DTCs.
Turn the ignition off.
Disconnect the Instrument Cluster Panel Pod harness connector.
Turn the ignition on, with the DRBIII
t, read DTCs.
Does the DRBIII
t display 9NAV Switch Input Open9?
All
Yes
→ Replace the Instrument Panel Switch Pod in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
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?
All
Yes
→ Repair the NAV Mux Signal circuit for a short to the EVIC/NAV
Mux Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
723
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Disconnect the Instrument Panel Switch Pod harness connector.
Measure the resistance between ground and the NAV Mux Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the NAV Mux Signal circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
724
INSTRUMENT CLUSTER
NAV SWITCH INPUT CIRCUIT SHORT —
Continued
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