Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1357

12.

BRAKE LAMP SWITCH - PRIMARY SIGNAL OPEN

Turn the ignition on.

While monitoring the PRIM BRAKE SWITCH status with the scan tool,
connect a jumper wire between the Primary Brake Switch Signal circuit
and the Fused B(+) circuit.

Does the scan tool display change from RELEASED to
PRESSED?

Yes

>> Adjust or replace the Brake Lamp Switch in accordance

with the Service Information.

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

No

>> Go To 13

13.

(L950) PRIMARY BRAKE SWITCH SIGNAL CIRCUIT SHORTED TO VOLTAGE

Turn the ignition off.

Disconnect the ECM harness connectors.

Remove the ASD Relay from the IPM.

Connect a jumper wire between cavity 30 and cavity 87 of the ASD
Relay connector.

Turn the ignition on.

Measure the voltage between the (L950) Primary Brake Switch Signal
circuit and ground.

Is the voltage above 1.0 volt?

Yes

>> Repair the (L950) Primary Brake Switch Signal circuit for a

short to voltage.

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

No

>> Go To 14

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14.

(L950) PRIMARY BRAKE SWITCH SIGNAL CIRCUIT OPEN

Turn the ignition off.

Measure the resistance of the (L950) Primary Brake Switch Signal cir-
cuit.

Is the resistance below 10.0 ohms?

Yes

>> Replace and program the Engine Control Module in accor-

dance with the Service Information.

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

No

>> Repair the (L950) Primary Brake Switch Signal circuit for an

open.

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

LX

ENGINE ELECTRICAL DIAGNOSTICS - DIESEL

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P0513-INVALID SKIM KEY

For a complete wiring diagram Refer to Section 8W

•

When Monitored:
With the ignition on.

•

Set Condition:
The ECM receives and invalid SKIM Key message from the SKREEM.

Possible Causes

INTERMITTENT DTC

UNPROGRAMMED IGNITION KEYS

SKREEM

ENGINE CONTROL MODULE (ECM)

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

Diagnostic Test

1.

CHECK FOR SKREEM COMMUNICATION AND DTCS

Ignition on, engine not running.

With the scan tool, check for proper communication and active DTCs in the SKREEM.

Are any SKREEM communication problems or DTCs present?

Yes

>> Refer to the symptom list for problems related to SKREEM Communication and DTCs before continuing.

No

>> Go To 2

2.

CHECK FOR ACTIVE DTC

Turn the ignition on.

With the scan tool, clear all ECM DTCs.

Turn the ignition on and off several times pausing 10 seconds between key cycles.

With the scan tool, select View DTCs in the ECM.

Is the status Active for this DTC?

Yes

>> Go to 3

No

>> Refer to *CHECKING FOR INTERMITTENT DTC in the symptom list. (Refer to 9 - ENGINE - DIAG-

NOSIS AND TESTING)

3.

REPROGRAM IGNITION KEYS AND RETEST

Turn the ignition on.

With the scan tool, clear all ignition keys out of SKREEM memory.

With the scan tool, reprogram all ignition keys to the SKREEM.

Turn the ignition on and off several times pausing 10 seconds between key cycles.

With the scan tool, select View DTCs in the ECM.

Is the status Active for this DTC?

Yes

>> 4

No

>> Test complete.

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4.

REPLACE THE SKREEM AND RETEST

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

Turn the ignition on.

With the scan tool, clear all ECM DTCs.

Turn the ignition on and off several times pausing 10 seconds between key cycles.

With the scan tool, select View DTCs in the ECM.

Is the status Active for this DTC?

Yes

>> Replace and program the Engine Control Module in accordance the Service Information.

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

No

>> Test complete.

LX

ENGINE ELECTRICAL DIAGNOSTICS - DIESEL

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