Chrysler PT Cruiser. Manual — part 136
TEST
ACTION
APPLICABILITY
13
Turn the ignition off.
Disconnect the MAF Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Sensor Reference Voltage A circuit
at the MAF harness connector.
Is the resistance below 1000 ohms?
All
Yes
→ Repair the Sensor Reference Voltage A circuit for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Go To 14
14
Turn the ignition off.
Disconnect the MAF Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage of the Sensor Reference Voltage A circuit in the ECM harness
connector.
Is the voltage above 1.0 volt?
All
Yes
→ Repair the Sensor Reference Voltage A circuit for a short to
voltage.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
15
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running and at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→ Repair as necessary.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Test Complete.
24
DRIVEABILITY - DIESEL
P0100-MASS AIR FLOW SENSOR SIGNAL VOLTAGE TOO HIGH —
Continued
Symptom List:
P0105-BAROMETRIC PRESSURE CIRCUIT SIGNAL VOLTAGE TOO
HIGH
P0105-BAROMETRIC PRESSURE CIRCUIT SIGNAL VOLTAGE TOO
LOW
P0606-ECM ERROR GATE ARRAY - COMMUNICATION
P0606-ECM ERROR GATE ARRAY - QUANTITY STOP
P0606-ECM ERROR RECOVERY HAS OCCURRED
P0606-ECM ERROR REDUNDANT OVERRUN MONITORING
P1601-CAPACITOR VOLTAGE 1 VOLTAGE TOO HIGH
P1601-CAPACITOR VOLTAGE 1 VOLTAGE TOO LOW
P1606-AFTER RUN SHUT OFF ERROR-INJECTION POWERSTAGE
P1606-AFTER RUN SHUT OFF ERROR-ZERO QUANTITY
P1608-A/D CONVERTER ERROR APP SENSOR GROUND FAILURE
P1608-A/D CONVERTER ERROR INTERNAL FAILURE
P1608-A/D CONVERTER ERROR VOLTAGE FAILURE
P1610-VOLTAGE REGULATOR SIGNAL VOLTAGE TOO HIGH
P1610-VOLTAGE REGULATOR SIGNAL VOLTAGE TOO LOW
P1680-EEPROM PLAUSIBILITY CHECKSUM ERROR
P1680-EEPROM PLAUSIBILITY CODE WORD INCORRECT OR
MISSING
P1680-EEPROM PLAUSIBILITY COMMUNICATION ERROR
P1680-EEPROM PLAUSIBILITY VARIATION NUMBER ERROR
P1680-EEPROM PLAUSIBILITY VIN CHECKSUM ERROR
P1680-EEPROM PLAUSIBILITY WRITE ERROR
P1685-SKIM SYSTEM INVALID SECRET KEY IN EEPROM
P1685-SKIM SYSTEM WRITE ACCESS TO EEPROM FAILURE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0105-BAROMETRIC PRES-
SURE CIRCUIT SIGNAL VOLTAGE TOO HIGH.
When Monitored and Set Condition:
P0105-BAROMETRIC PRESSURE CIRCUIT SIGNAL VOLTAGE TOO HIGH
When Monitored:
With the ignition on.
Set Condition:
The Barometric Pressure Sensor Signal is above 4.86 volts for 2.0 seconds.
P0105-BAROMETRIC PRESSURE CIRCUIT SIGNAL VOLTAGE TOO LOW
When Monitored:
With the ignition on.
Set Condition:
The Barometric Pressure Sensor Signal is below 0.22 volt for 2.0 seconds.
25
DRIVEABILITY - DIESEL
P0606-ECM ERROR GATE ARRAY - COMMUNICATION
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal failure.
P0606-ECM ERROR GATE ARRAY - QUANTITY STOP
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal failure.
P0606-ECM ERROR RECOVERY HAS OCCURRED
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal failure.
P0606-ECM ERROR REDUNDANT OVERRUN MONITORING
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal failure.
P1601-CAPACITOR VOLTAGE 1 VOLTAGE TOO HIGH
When Monitored:
With the engine running. During every 180° of engine rotation.
Set Condition:
The ECM determines that the capacitor voltage is greater than 100 volts.
P1601-CAPACITOR VOLTAGE 1 VOLTAGE TOO LOW
When Monitored:
With the engine running. During every 180° of engine rotation.
Set Condition:
The ECM determines that the capacitor voltage is less than 91 volts.
P1606-AFTER RUN SHUT OFF ERROR-INJECTION POWERSTAGE
When Monitored:
At ignition off.
Set Condition:
The ECM detects the engine speed has not fallen below 650 RPM within
0.5 seconds after ignition off.
P1606-AFTER RUN SHUT OFF ERROR-ZERO QUANTITY
When Monitored:
At ignition off.
Set Condition:
The ECM detects the engine speed has not fallen below 650 RPM within
0.5 seconds after ignition off.
P1680-EEPROM PLAUSIBILITY CHECKSUM ERROR
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal failure.
26
DRIVEABILITY - DIESEL
P0105-BAROMETRIC PRESSURE CIRCUIT SIGNAL VOLTAGE TOO
HIGH —
Continued
P1680-EEPROM PLAUSIBILITY CODE WORD INCORRECT OR MISSING
When Monitored:
With the ignition on.
Set Condition:
The ECM detects the codeword test routine not yet performed (for injector
classification).
P1680-EEPROM PLAUSIBILITY COMMUNICATION ERROR
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal failure.
P1680-EEPROM PLAUSIBILITY VARIATION NUMBER ERROR
When Monitored:
With the ignition on.
Set Condition:
The ECM detects incorrect software programming.
P1680-EEPROM PLAUSIBILITY VIN CHECKSUM ERROR
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal failure.
P1680-EEPROM PLAUSIBILITY WRITE ERROR
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal failure.
P1685-SKIM SYSTEM INVALID SECRET KEY IN EEPROM
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal mismatch of the secret key code when
performing an internal EEPROM check.
P1685-SKIM SYSTEM WRITE ACCESS TO EEPROM FAILURE
When Monitored:
With the ignition on.
Set Condition:
The ECM detects an internal EEPROM fault.
POSSIBLE CAUSES
ENGINE CONTROL MODULE
INTERMITTENT CONDITION
27
DRIVEABILITY - DIESEL
P0105-BAROMETRIC PRESSURE CIRCUIT SIGNAL VOLTAGE TOO
HIGH —
Continued
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