DTC 56: "N" Range Light System: Diagnosis

Required Special Tool: 

• MB991502: Scan Tool (MUT-II)

1. STEP 1. Check the "N" range light bulb. 
   1. Turn the ignition switch to the "ON" position.
   2. Move the selector lever to "N" position.
      • The "N" range light in the combination meter illuminates.
   3. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Does the "N" range light illuminate? 

   YES  : Go to  Step 6.

   NO:  Go to Step 2.

2. STEP 2. Check the "N" range light bulb. 
   1. Remove the combination meter. Refer to Instrument Panel Systems - COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR .
   2. Check the "N" range light bulb.

   Q: Is the bulb in good condition? 

   YES  : Go to Step 3.

   NO:  Replace the "N" range light bulb.

3. STEP 3. Check combination meter connector C-101 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are the connector and terminals in good condition? 

   YES  : Go to Step 4.

   NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

   Fig 1: Locating Combination Meter Connector Terminal C-101

   Courtesy of CHRYSLER CORP.
4. STEP 4. Measure the resistance at combination meter connector C-101. 
   1. Disconnect connector C-101 and measure at the harness side.
      Fig 2: Locating Combination Meter Connector Terminal C-101

      Courtesy of CHRYSLER CORP.
   2. Measure the resistance between terminal 11 and ground.
      • The measured resistance should be less than 2 ohms.

   Q: Is the measured resistance less than 2 ohms? 

   YES  : Go to  Step 6.

   NO:  Go to Step 5.

   Fig 3: Measuring Resistance Between Terminal 11 And Ground

   Courtesy of CHRYSLER CORP.
5. STEP 5. Check the harness for open circuit or damage between combination meter connector C-101 terminal 11 and body ground. 

   Q: Is the harness wire in good condition? 

   YES  : Go to Step 8.

   NO:  Repair or replace the harness wire.

   Fig 4: Locating Combination Meter Connector Terminal C-101

   Courtesy of CHRYSLER CORP.
6. STEP 6. Check transmission range switch connector B-111, combination meter connector C-101, intermediate connector C-24 and PCM connector C-123 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
   Fig 5: Identifying Transmission Range Switch Connector Terminal B-111

   Courtesy of CHRYSLER CORP.
   Fig 6: Locating Combination Meter Connector Terminal C-101

   Courtesy of CHRYSLER CORP.
   Fig 7: Identifying Intermediate Connector Terminal C-24

   Courtesy of CHRYSLER CORP.

   Q: Are the connectors and terminals in good condition? 

   YES  : Go to Step 7.

   NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

   Fig 8: Locating PCM Connector Terminal C-123

   Courtesy of CHRYSLER CORP.
7. STEP 7. Check the harness for open circuit, short circuit to ground and damage between combination meter connector C-101 terminal 15 and PCM connector C-123 terminal 121. 

   Q: Is the harness wire in good condition? 

   YES  : Go to Step 8.

   NO:  Repair or replace the harness wire.

   Fig 9: Locating Combination Meter Connector Terminal C-101

   Courtesy of CHRYSLER CORP.
   Fig 10: Locating PCM Connector Terminal C-123

   Courtesy of CHRYSLER CORP.
8. STEP 8. Using scan tool MB991502, read the A/T diagnostic trouble code. 
   CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
   1. Connect scan tool MB991502 to the data link connector.
   2. Turn the ignition switch to the "ON" position.
   3. Read the A/T DTC.
   4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is DTC 56 set? 

   YES  : Replace the PCM.

   NO:  The procedure is complete.

   Fig 11: Connecting Scan Tool To Data Link Connector

   Courtesy of CHRYSLER CORP.