Chrysler Town, Dodge Caravan. Manual — part 802
Symptom:
FRONT FOG LAMP SHORTED TO BATTERY
When Monitored and Set Condition:
FRONT FOG LAMP SHORTED TO BATTERY
When Monitored:
Ignition On.
Set Condition:
When a battery fault condition is present.
POSSIBLE CAUSES
INTERMITTENT CONDITION
FOG LAMP RELAY
FRONT CONTROL MODULE
INTELLIGENT POWER MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all IPM DTC’s.
Turn the Fog Lamps on.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Front Fog Lamp Shorted To Battery?
All
Yes
→ Go To 2
No
→ The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced,pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Remove and install a known good relay in place of the Fog Lamp Relay.
Do the Fog Lamps operate normally?
All
Yes
→ Replace the Fog Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off.
Remove the Fog Lamp Relay from the IPM.
Remove the Front Control Module from the IPM.
Measure the voltage of the Fog Lamp Relay Control circuit and ground.
Is the voltage above 1.0 volts?
All
Yes
→ Replace the Intelligent Power Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
444
EXTERIOR LIGHTING
Symptom:
HEADLAMP SWITCH MISMATCH
When Monitored and Set Condition:
HEADLAMP SWITCH MISMATCH
When Monitored:
Ignition ON
Set Condition:
Headlamp switch is in Auto mode and the vehicle is not EC Mirror
equipped.
POSSIBLE CAUSES
VERIFY AUTO HEADLAMP SWITCH
INTERMITTENT WIRING AND CONNECTORS
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, record and erase DTC’s.
Turn the headlamps to the Auto position.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display HEADLAMP SWITCH MISMATCH?
All
Yes
→ Go To 2
No
→ Go To 4
2
Inspect the vehicles side view mirrors.
Is this vehicle equipped with Electro chromatic mirrors?
All
Yes
→ Go To 3
No
→ Replace the Auto Headlamp Switch with a non Auto Headlamp
Switch.
Perform BODY VERIFICATION TEST - VER 1.
3
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Body Control Module in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
4
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
445
EXTERIOR LIGHTING
Symptom:
HEADLAMP SWITCH OPEN
When Monitored and Set Condition:
HEADLAMP SWITCH OPEN
When Monitored:
Ignition ON
Set Condition:
A Sensor voltage is over 4.8 volts for more than .0625 seconds.
POSSIBLE CAUSES
INTERMITTENT WIRING AND CONNECTORS
HEADLAMP SWITCH MUX CIRCUIT OPEN
HEADLAMP SWITCH MUX RETURN CIRCUIT OPEN
HEADLAMP SWITCH OPEN
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, record and erase DTC’s.
Turn the headlamps to the ON position.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display HEADLAMP SWITCH OPEN?
All
Yes
→ Go To 2
No
→ Go To 5
2
Turn the ignition off.
Disconnect the Headlamp Switch harness connector.
Connect a jumper wire between the Headlamp Switch MUX circuit and the
Headlamp Switch MUX Return circuit in the Headlamp Switch harness connector.
Turn the ignition on.
With the DRBIII
t, select Body, Body Controller and read the Headlamp Switch volts.
Does the DRBIII
t Headlamp Switch Sensor voltage read less than 0.5 Volts?
All
Yes
→ Replace the Headlamp Switch in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
446
EXTERIOR LIGHTING
TEST
ACTION
APPLICABILITY
3
Turn the ignition off to the lock position.
Disconnect the Body Control Module C5 harness connector.
Disconnect the Headlamp Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Headlamp Switch MUX circuit from the Body Control
Module connector to the Headlamp Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Headlamp Switch MUX circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off to the lock position.
Disconnect the Body Control Module C5 harness connector.
Disconnect the Headlamp Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Headlamp Switch MUX Return circuit from the Body
Control Module connector to the Headlamp Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Headlamp Switch MUX 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
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
447
EXTERIOR LIGHTING
HEADLAMP SWITCH OPEN —
Continued
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