Bcm - Ignition Mux Switch Input Open - Dodge ZB 2005 Service Manual

IGNITION, POWER, ACCESSORY
Symptom:

BCM - IGNITION MUX SWITCH INPUT OPEN

When Monitored and Set Condition:
BCM - IGNITION MUX SWITCH INPUT OPEN
When Monitored: Continuously.
Set Condition: When the BCM detects the ignition switch MUX circuit voltage is above
4.7 volts for at least 2 seconds.
IGNITION SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
IGNITION SWITCH SENSE CIRCUIT OPEN
IGNITION SWITCH SENSE RETURN CIRCUIT OPEN
IGNITION SWITCH
BODY CONTROL MODULE
TEST
1 Turn the ignition off.
Disconnect the Ignition Switch harness connector.
Disconnect the BCM C4 harness connector.
Measure the voltage between the Ignition Switch Sense circuit and ground.
Is the voltage above 5.00 volts?
Yes → Repair the Ignition Switch Sense circuit for a short to voltage.
No
2 Turn the ignition off.
Disconnect the Ignition Switch harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Ignition Switch Sense circuit between the BCM C4
connector and the Ignition Switch connector.
Is the resistance above 5.0 ohms?
Yes → Repair the Ignition Switch Sense circuit for an open.
No
3 Turn the ignition off.
Disconnect the Ignition Switch harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Ignition Switch Sense Return circuit between the BCM
C4 connector and the Ignition Switch connector.
Is the resistance above 5.0 ohms?
Yes → Repair the Sense Return circuit for an open.
No
POSSIBLE CAUSES
ACTION
Perform BODY VERIFICATION TEST - VER 1.
→ Go To 2
Perform BODY VERIFICATION TEST - VER 1.
→ Go To 3
Perform BODY VERIFICATION TEST - VER 1.
→ Go To 4
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APPLICABILITY
All
All
All