Dodge Caliber. Manual - part 791

P0507-IDLE SPEED PERFORMANCE HIGHER THAN EXCEPTED

For a complete wiring diagram Refer to Section 8W.

Theory of Operation

The objective of the Idle Speed Rationality monitor is to evaluate the ability of the idle speed control system to
achieve and maintain a steady idle, by monitoring engine RPM during idle. If engine RPM is not within a calibrated
deadband of target idle speed, a timer is started. If the timer reaches a maximum threshold without any sign of the
RPM trending towards control, a soft failure is generated.

•

When Monitored:
With the engine idling in drive (for CVT vehicles) with the brake applied, MAF < 250 mg/tdc, air temp > -17.8°
C (0° F) enable after coolant temp > 70° C (158° F), canister purge < 100% duty cycle, and no VSS, MAF/
MAP, ECT, TPS, ETC, CKP Sensor, fuel system, or injector DTCs present.

•

Set Condition:
If the idle speed is 175 RPM or more above the target idle speed for 30 seconds. Two Trip Fault. Three good
trips to turn off the MIL.

Possible Causes

AIR INDUCTION SYSTEM LEAKS OR RESTRICTIONS

PCV SYSTEM LEAKS OR RESTRICTIONS

VACUUM LEAKS

THROTTLE BODY

POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).

Diagnostic Test

ACTIVE DTC

NOTE: It is possible for ETC DTCs to be set at the same time as this DTC. Proceed with this test only if the
other DTCs that are present are ETC related, but clear them before proceeding. If any other DTCs are set,
they must be diagnosed and repaired before continuing this test.
Ignition on, engine not running.

With a scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

>> Go to 2

>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -

DIAGNOSIS AND TESTING)

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

AIR INDUCTION SYSTEM LEAKS OR RESTRICTIONS

Inspect the air induction system for the following problems:

Restrictions - dirty air cleaner, foreign material trapped in the air intake tube, etc.

Leaks - air intake tube connection, air cleaner housing, etc.

Were any problems found?

Yes

>> Repair or replace as necessary.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

>> Go to 3

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PCV SYSTEM

Inspect the PCV system for the following problems:

Restrictions - sticking valve, collapsed hoses or tubes, obstructed passages or ports, etc.

Leaks - cracked or damaged hoses or tubes, hose or tube connections disconnected at PCV valve or throttle body,
PCV valve stuck open, etc.

Were any problems found?

Yes

>> Repair as necessary.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

>> Go to 4

ENGINE VACUUM LEAKS

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands
near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in
personal injury or death.
Start the engine.

Inspect the engine for external vacuum leaks.

Inspect the engine for internal leaks.

Were any problems found?

Yes

>> Repair as necessary.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

>> Go to 5

THROTTLE BODY OPERATION

Using a straight edge, verify that the throttle plate is not bent. If the throttle plate is bent, the throttle body must be
replaced.

Start the engine.

While the engine is running, lightly tap on ETC Motor, and listen for the idle to change.

Were any problems found?

Yes

>> Repair as necessary.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

>> Go to 6

POWERTRAIN CONTROL MODULE (PCM)

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the throttle body and the
PCM.

Look for any chafed, pierced, pinched, or partially broken wires.

Look for broken, bent, pushed out or corroded terminals.

Refer to any Technical Service Bulletins that may apply.

Were any problems found?

Yes

>> Repair as necessary.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

>> Replace and program the Powertrain Control Module per Service Information.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

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ENGINE ELECTRICAL DIAGNOSTICS - GPEC

P0513-INVALID SKIM KEY

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Ignition on.

•

Set Condition:
The PCM detects an invalid ignition key. One Trip Fault.

Possible Causes

INCORRECT VIN PROGRAMMED IN THE PCM

NO COMMUNICATION WITH SKREEM/WCM

NO VIN PROGRAMMED IN THE PCM

IGNITION KEY

POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).

Diagnostic Test

ACTIVE DTC

Ignition on, engine not running.

With a scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

>> Go to 2

>> Go to 6

NO COMMUNICATION WITH SKREEM/WCM

NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The
screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting
any of the network components allows access to the source of the problem.
With the scan tool, attempt to communicate with the SKREEM/WCM.

Can the scan tool communicate with the SKREEM/WCM?

Yes

>> Go to 3

>> Refer to Section 8 - Electrical VEHICLE THEFT SECURITY - ELECTRICAL DIAGNOSTICS and perform

the appropriate Diagnostic Procedure.

Perform the SKREEM/WCM VERIFICATION Test.

SKREEM/WCM TROUBLE CODES SET

With the scan tool, check for SKREEM/WCM DTCs.

Are any DTCs present in the SKREEM/WCM?

Yes

>> Refer to Section 8 - Electrical VEHICLE THEFT SECURITY - ELECTRICAL DIAGNOSTICS and perform

the appropriate Diagnostic Procedure.

Perform the SKREEM/WCM VERIFICATION Test.

>> Go to 4

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VIN PROGRAMMED INTO PCM

With the scan tool, display the VIN that is programmed in the PCM.

Has a VIN been programmed into the PCM?

Yes

>> Go to 5

>> Program the correct VIN into the PCM and retest.

Perform the SKREEM/WCM VERIFICATION Test.

POWERTRAIN CONTROL MODULE (PCM)

Turn the ignition off.

Replace and program the SKREEM/WCM in accordance with the Service Information.

Ignition on, engine not running.

With the scan tool, erase all SKREEM/WCM and PCM DTCs.

Attempt to start the engine.

With a scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

>> NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or termi-

nal push out. Repair as necessary. Replace and program the Powertrain Control Module in accordance
with the Service Information.

Perform the SKREEM/WCM VERIFICATION Test.

>> Test Complete.

IGNITION KEY

NOTE: This DTC could have been set if the SKREEM/WCM harness connector was disconnected, or if the
SKREEM/WCM was replaced recently.

NOTE: All of the ignition keys for this vehicle must be tested to verify proper operation.
Ignition on, engine not running.

Verify that the correct VIN is programmed into the PCM and SKREEM/WCM.

Turn the ignition off.

Using each vehicle key, turn the ignition on and start the engine.

With a scan tool, View DTCs for each key.

Is the status Active for this DTC?

Yes

>> Replace the ignition key.

Perform the SKREEM/WCM VERIFICATION Test.

>> Test Complete.

NOTE: If this DTC cannot be reset, it could have been an actual theft attempt.

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