Chrysler Town, Dodge Caravan. Manual — part 842
Symptom:
IGNITION MUX SWITCH INPUT OPEN
When Monitored and Set Condition:
IGNITION MUX SWITCH INPUT OPEN
When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
Set Condition:
The Ignition MUX sense circuit voltage at the BCM goes above 4.9 volts.
POSSIBLE CAUSES
IGNITION SWITCH SENSE CIRCUIT SHORTED TO VOLTAGE
IGNITION SWITCH FAILURE
IGNITION SWITCH SENSE RETURN CIRCUIT OPEN
BODY CONTROL MODULE
IGNITION SWITCH SENSE CIRCUIT OPEN
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Ignition Switch 5-way connector.
Turn the ignition on.
Measure the voltage of the Ignition Switch Sense circuit.
Is the voltage above 5.5 volts?
All
Yes
→ Repair the Ignition Switch Sense circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition off.
Disconnect the Ignition Switch 5-way connector.
Connect a jumper wire between the Ignition Switch Sense circuit and ground.
With the DRBIII
t in Sensors, read the IGNITION SW voltage.
Does the DRBIII
t display IGNITION SW 0.0 volts?
All
Yes
→ Go To 3
No
→ Go To 5
3
Turn the ignition off.
Disconnect the Ignition Switch 5-way connector.
Connect a jumper wire between the Ignition Switch Sense circuit and the Ignition
Switch Sense Return circuit.
With the DRBIII
t in Sensors, read the IGNITION SW voltage.
Does the DRBIII
t display IGNITION SW 0.0 volts?
All
Yes
→ Replace the Ignition Switch in accordance with the service infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
604
IGNITION, POWER, ACCESSORY
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Reconnect the Ignition Switch 5-way connector.
Gain access to the Body Control Module C4 connector.
Backprobe a jumper wire between the Ignition Switch Sense Return circuit and
ground.
With the DRBIII
t in Sensors, read the IGNITION SW voltage.
Does the DRBIII
t display IGNITION SW 0.0 volts?
All
Yes
→ Repair the Ignition Switch Sense Return circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module in accordance with the service
information.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Gain access to the Body Control Module C5 connector.
Backprobe a jumper wire between the Ignition Switch Sense circuit and ground.
With the DRBIII
t in Sensors, read the IGNITION SW voltage.
Does the DRBIII
t display IGNITION SW 0.0 volts?
All
Yes
→ Repair the Ignition Switch Sense circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module in accordance with the service
information.
Perform BODY VERIFICATION TEST - VER 1.
605
IGNITION, POWER, ACCESSORY
IGNITION MUX SWITCH INPUT OPEN —
Continued
Symptom:
IGNITION MUX SWITCH INPUT SHORT
When Monitored and Set Condition:
IGNITION MUX SWITCH INPUT SHORT
When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
Set Condition:
The Ignition MUX Sense circuit voltage at the BCM goes below 0.5 volt for
more than 2 seconds.
POSSIBLE CAUSES
IGNITION SWITCH SHORTED
IGNITION SWITCH SENSE CIRCUIT SHORTED TO GROUND
IGNITION SWITCH SENSE CIRCUIT SHORTED TO IGNITION SWITCH SENSE RETURN CIR-
CUIT
IGNITION SWITCH SENSE RETURN CIRCUIT SHORTED TO GROUND
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Ignition Switch 5-way connector.
With the DRBIII
t in Sensors, read the IGNITION SW voltage.
Does the DRBIII
t display IGNITION SW 0.0 volts?
All
Yes
→ Go To 2
No
→ Replace the Ignition Switch in accordance with the service infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Ignition Switch 5-way connector.
Disconnect the Body Control Module C5 connector.
Measure the resistance between ground and the Ignition Switch Sense circuit in the
BCM C5 connector.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Ignition Switch Sense circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
606
IGNITION, POWER, ACCESSORY
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Gain access to the Body Control Module.
Disconnect the Body Control Module C4 and C5 harness connectors.
Disconnect the Ignition Switch 5-way harness connector.
Measure the resistance between the Ignition Switch Sense circuit and the Ignition
Switch Sense Return circuit.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Ignition Switch Sense circuit for a short to the Ignition
Switch Sense Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the Ignition Switch 5-way connector.
Disconnect the Body Control Module C4 connector.
Measure the resistance between ground and the Ignition Switch Sense Return circuit
in the BCM C4 connector.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Ignition Switch Sense Return circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module in accordance with the service
information.
Perform BODY VERIFICATION TEST - VER 1.
607
IGNITION, POWER, ACCESSORY
IGNITION MUX SWITCH INPUT SHORT —
Continued
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст