Chrysler PT Cruiser. Manual — part 32
Symptom:
POWER SUPPLY VOLTAGE LOW
When Monitored and Set Condition:
POWER SUPPLY VOLTAGE LOW
When Monitored:
The ACM continuously monitors the Ignition Run - Start and Run Only
circuits to guarantee that the Side Impact Sensors will have sufficient voltage to function
properly.
Set Condition:
Once both ignition feeds into the ACM are determined to be below 7.4
volts, with at least one above 5.5 volts. The code will remain set until at least one ignition
circuit is above 8.0 volts.
POSSIBLE CAUSES
RUN OR RUN - START ACTIVE TROUBLE CODES
RUN AND RUN - START CIRCUITS VOLTAGE LOW
ACM, LOW SUPPLY VOLTAGE
STORED CODE OR INTERMITTENT CONDITION
ACTIVE CODE PRESENT
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
Ensure the battery is fully charged.
NOTE: For the purpose of this test, the AECM and ORC modules will be
referred to as an ACM.
Repair all Ignition Run and Run-Start circuit DTCs before performing this test.
SELECT ACTIVE OR STORED DTC:
All
ACM - ACTIVE DTC
ACM - STORED DTC
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
2
With the DRBIII
t, read the active DTCs.
NOTE: A Diagnostic trouble code will set if the voltage on the Ignition Run
or Run - Start circuits is less than 5.5 volts
Verify that all Ignition Run and Run - Start circuits DTCs have been repaired before
performing the ACTIVE Power Supply Voltage Low DTC.
Any active Run or Run - Start codes?
All
Yes
→ Refer to symptom list for problems related to Fused Ignition
Switch Output Run and Run - Start circuits.
Perform __AIRBAG VERIFICATION TEST - VER 1.
No
→ Go To 3
115
AIRBAG
TEST
ACTION
APPLICABILITY
3
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Disconnect the Airbag Control Module connector(s).
NOTE: Check connectors - Clean and repair as necessary.
WARNING: IF THE AIRBAG CONTROL MODULE IS DROPPED AT ANY
TIME, IT MUST BE REPLACED. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND PERSONAL INJURY OR DEATH.
Connect the appropriate Load Tool ACM Adaptor to the Airbag Control Module
connector.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION ON, THEN RECONNECT THE BATTERY.
Using a 12-volt test light connected to ground, check the Run and Run - Start circuits
at the ACM adaptor.
The test light must illuminate brightly. Compare the brightness to that of a direct
connection to the battery.
Does the test light illuminate brightly on both circuits?
All
Yes
→ Go To 4
No
→ Repair the open or high resistance in the Fused Ignition Switch
Output Run and Run - Start circuits.
Perform __AIRBAG VERIFICATION TEST - VER 1.
4
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
WARNING: IF THE AIRBAG CONTROL MODULE IS DROPPED AT ANY
TIME, IT MUST BE REPLACED. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND PERSONAL INJURY OR DEATH.
If there are no possible causes remaining, view repair.
All
Repair
Replace the Airbag Control Module in accordance with Service
Instructions.
Perform __AIRBAG VERIFICATION TEST - VER 1.
116
AIRBAG
POWER SUPPLY VOLTAGE LOW —
Continued
TEST
ACTION
APPLICABILITY
5
With the DRBIII
t, record and erase all DTC’s from all Airbag modules.
If equipped with Passenger Airbag On - Off switch, read the DTC’s in all switch
positions.
If any ACTIVE codes are present they must be resolved before diagnosing any stored
codes.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Look for chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed
out, spread, corroded, or contaminated terminals.
The following additional checks may assist you in identifying a possible intermittent
problem.
Reconnect any disconnected components and harness connector.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION ON, THEN RECONNECT THE BATTERY.
With the DRBIII
t monitor active codes as you work through the following steps.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, MAINTAIN A SAFE
DISTANCE FROM ALL AIRBAGS WHILE PERFORMING THE FOLLOWING
STEPS.
Wiggle the wiring harness and connectors of the related airbag circuit or component.
If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop
to stop.
IF only stored codes return continue the test until the problem area has been isolated
In the previous steps you have attempted to recreate the conditions responsible for
setting active DTC in question.
Are any ACTIVE DTCs present?
All
Yes
→ Select appropriate symptom from Symptom List.
No
→ No problem found at this time. Erase all codes before returning
vehicle to customer.
117
AIRBAG
POWER SUPPLY VOLTAGE LOW —
Continued
Symptom:
RIGHT CURTAIN OR SEAT SQUIB CIRCUIT OPEN
When Monitored and Set Condition:
RIGHT CURTAIN OR SEAT SQUIB CIRCUIT OPEN
When Monitored:
With the ignition on, the ACM monitors the resistance of the Right
Seat Squib circuits.
Set Condition:
When the ACM detects an open circuit or high resistance on the Right
Seat Squib circuits.
POSSIBLE CAUSES
RIGHT CURTAIN OR SEAT SQUIB CIRCUIT OPEN
RIGHT CURTAIN OR SEAT SQUIB LINE 1 OR LINE 2 CIRCUIT OPEN
ACM, RIGHT CURTAIN OR SEAT SQUIB CIRCUIT OPEN
STORED CODE OR INTERMITTENT CONDITION
ACTIVE CODE PRESENT
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
NOTE: Ensure the battery is fully charged.
NOTE: For the purpose of this test, the AECM and ORC modules will be
referred to as an ACM.
SELECT ACTIVE or STORED DTC:
All
ACM - ACTIVE DTC
IACM - STORED DTC
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
118
AIRBAG
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