Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
Make sure the Stop Lamp Switch is adjusted properly before continuing.

NOTE:
Make sure the Stop Lamp Switch is properly wired, such as (B15) Brake Switch No. 1 and (B16) Brake Switch No. 2 circuit are not switched at the harness connector.
1. Ignition on, engine not running.
2. With the scan tool, select View DTCs.
  Is the DTC Active at this time?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
STOP LAMP SWITCH
1. Measure the resistance between the (Z910) Ground circuit terminal and the (B15) Brake Switch No. 1 Signal terminal in the Stop Lamp Switch.
2. Next, measure the resistance between the (F941) Fused Ignition Switch circuit terminal and the (B16) Brake Switch No. 2 Signal circuit terminal in the Stop Lamp Switch.
3. Apply and release the brake pedal while monitoring the ohmmeter.
  Does the resistance change from below 5.0 Ohms to an open circuit for one or both of the measurements taken?
  
  Yes
  - Go To 3.
  No
  - Verify that there is good pin to terminal contact in the Switch and Control Module connectors. Replace the Stop Lamp Switch if no problems were found in the connectors. Refer to SWITCH, STOP LAMP, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
(B16) BRAKE SWITCH NO. 2 SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Measuring Voltage On (B16) Brake Switch No. 2 Signal Circuit In Stop Lamp Switch Harness Connector
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the C2 PCM harness connector.
2. Ignition on, engine not running.
3. Measure the voltage on the (B16) Brake Switch No. 2 Signal circuit in the Stop Lamp Switch harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (B16) Brake Switch No. 2 Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4.
(B15) BRAKE SWITCH NO. 1 SIGNAL CIRCUIT SHORTED TO GROUND

Fig 2: Measuring Resistance Between Ground And (B15) Brake Switch No. 1 Signal Circuit In Stop Lamp Switch Harness Connector
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (B15) Brake Switch No. 1 Signal circuit in the Stop Lamp Switch harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the short to ground in the (B15) Brake Switch No. 1 Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5.
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Stop Lamp Switch and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Switch and Powertrain Control Module connectors.
4. Perform any Technical Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to PCM - REMOVAL , also see PCM / TCM PROGRAMMING .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .