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) CHECK FOR AN ACTIVE DTC
Turn the ignition on.

With the scan tool, record and erase DTCs

Wait 30 seconds.

With the scan tool, read DTCs.

Is the DTC active?

Yes
1. Go To 2).
No
1. The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1) .
2) CHECK THE (G20) IGNITION SWITCH SENSE CIRCUIT FOR A SHORT TO VOLTAGE

Fig 1: Measuring Voltage On Ignition Switch Sense Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Ignition Switch harness connector.

Connect a jumper wire between Ignition Switch harness connector cavities 3 and 5.

NOTE: This will provide power to the vehicle systems with the ignition switch disconnected.

Measure the voltage on the (G20) Ignition Switch Sense circuit.

Is the voltage above 5.4 volts?

Yes
1. Go To 3).
No
1. Go To 4).
3) CHECK THE (G20) IGNITION SWITCH SENSE CIRCUIT FOR A SHORT TO VOLTAGE

Fig 2: Measuring Voltage Of Ignition Switch Sense Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Remove the jumper wire between Ignition Switch harness connector cavities 3 and 5.

Disconnect the Instrument Cluster C2 harness connector.

Measure the voltage of the (G20) Ignition Switch Sense Circuit.

Is the voltage above 5.4 volts?

Yes
1. Repair the (G20) Ignition Switch Sense circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1) .
No
1. Replace the Instrument Cluster in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1) .
4) CHECK OPERATION OF IGNITION SWITCH

Fig 3: Checking Operation Of Ignition Switch
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Ignition Switch harness connector.

Connect a jumper wire between Ignition Switch harness connector cavities 3 and 5.

NOTE: This will provide power to the vehicle systems with the ignition switch disconnected.

Connect a jumper wire between Ignition Switch harness connector cavities 1 and 2.

With the scan tool, erase Instrument Cluster DTCs.

Wait 30 seconds.

With the scan tool, read Instrument Cluster DTCs.

Does the scan tool display-B2108-IGNITION SWITCH SENSE INPUT CIRCUIT LOW?

Yes
1. Replace the Ignition Switch in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1) .
No
1. Go To 5).
5) CHECK THE (G900) IGNITION SWITCH SENSE RETURN CIRCUIT FOR AN OPEN.

Fig 4: Measuring Resistance Of Ignition Switch Sense Return Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Remove the jumper wire between Ignition Switch harness connector cavities 3 and 5.

Disconnect the Instrument Cluster C2 harness connector.

Measure the resistance of the (G900) Ignition Switch Sense Return circuit between the Instrument Cluster C2 harness connector and the Ignition Switch Harness connector.

Is the resistance greater than 5 ohms?

Yes
1. Repair the (G900) Ignition Switch Sense Return circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1) .
No
1. Replace the Instrument Cluster in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1) .