Diagnostic Test
WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
- 1) ENGINE DTCs PRESENT
With the scan tool, read Engine DTCs.
Are there any Engine brake DTCs present?
Yes
- Refer to appropriate ENGINE ELECTRICAL DIAGNOSTIC or ENGINE SERVICE INFORMATION articles and perform the appropriate test(s).
- Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
- Go To step 2.
- 2) ABS MODULE DTCs PRESENT
With the scan tool, read ABS Module DTCs.
Are there any ABS DTCs present?
Yes
- Refer to the Brake category and perform the appropriate test(s). (Refer to BRAKES - DIAGNOSIS AND TESTING)
- Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
- Go To step 3.
- 3) (B29) BRAKE SWITCH SIGNAL OPEN Fig 1: Measuring Resistance Brake Switch Signal Circuit Between ESM & Stop Lamp Switch Harness Connector
Courtesy of DAIMLERCHRYSLER CORP.
Turn the ignition off to the lock position.
Disconnect the ESM harness connector.
Disconnect the Stop Lamp Switch harness connector.
Measure the resistance of the (B29) Brake Switch Signal circuit between the ESM harness connector and the Stop Lamp Switch harness connector.
Is the resistance above 5.0 ohms?
Yes
- Repair the (B29) Brake Switch Signal for an open.
- Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
- Go To step 4.
- 4) (B29) BRAKE SWITCH SIGNAL SHORT TO VOLTAGE
Turn the ignition on.
Measure the voltage of the (B29) Brake Switch Signal circuit.
Is the voltage above 0.5 volts?
Yes
- Repair the (B29) Brake Switch Signal for a short to voltage.
- Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
- Using the schematics as a guide, check the Electronic Shift Module (ESM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the ESM (Steering Column) per the Service Information.
- Perform NAG1 TRANSMISSION VERIFICATION TEST .