DTC 86: Side-Airbag Module (LH) (Squib) System Fault Ground Circuit (Short-Circuited to Ground): Diagnosis

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools:

MB991502: Scan Tool (MUT-II)
MB991865: Dummy Resistor
MB991866: Resistor Harness
MB991223 (MB991222): Harness Set (Probe)

STEP 1. Check the side-airbag module (LH).
1. Disconnect the negative battery terminal.
2. Disconnect the side-airbag module (LH) connector D-23.
  
  Fig 1: Identifying Connector D-23
  Courtesy of DAIMLERCHRYSLER CORPORATION
3. Connect special tool MB991865 to special tool MB991866.
  CAUTION: Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened.
4. Insert special tool MB991866 into the D-23 harness side connector by backprobing.
5. Connect the negative battery terminal.
6. Erase the DTC memory, and then recheck the DTC.
  
  Fig 2: Identifying Dummy Resistor
  Courtesy of DAIMLERCHRYSLER CORPORATION
Q: Is DTC 86 set?

YES : Go to Step 2.

NO: Replace the seatback assembly of the front seat (LH) (Refer to FRONT SEAT ASSEMBLY ). Then go to Step 4.
STEP 2. Check the side-airbag module (LH) circuit at the SRS-ECU connector C-145.
1. Disconnect the SRS-ECU connector C-145.
  
  Fig 3: Identifying Connector C-145
  Courtesy of DAIMLERCHRYSLER CORPORATION
  
  WARNING: To prevent the side-airbag from deploying unintentionally, disconnect the side-airbag module (LH) connector D-23 to short the squib circuit.
2. Disconnect the side-airbag module (LH) connector D-23.
  
  Fig 4: Identifying Connector D-23
  Courtesy of DAIMLERCHRYSLER CORPORATION
  
  CAUTION: Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened.
3. Check for continuity between the C-145 harness side connector terminals 21, 22 and body ground.
  It should be open circuit.
Q: Does continuity exist?

YES : Go to Step 3.

NO: Erase the DTC memory, and recheck if any DTC sets. If DTC 86 sets, replace the SRS-ECU (Refer to SRS CONTROL UNIT (SRS-ECU) ). Then go to Step 4.

Fig 5: Checking Continuity Between C-145 Harness Side Connector Terminals 21, 22 And Body Ground
Courtesy of DAIMLERCHRYSLER CORPORATION
STEP 3. Check the harness wires for short circuit to ground between the SRS-ECU connector C-145 (terminal No.21 and 22) and the side-airbag module (LH) connector D-23 (terminal No.1 and 2).
Q: Are the harness wires between the SRS-ECU connector C-145 (terminal No.21 and 22) and the side-airbag module (LH) connector D-23 (terminal No.1 and 2) in good condition?

YES : Go to Step 4.

NO: Repair the harness wires between the SRS-ECU connector C-145 and the side-airbag module (LH) connector D-23. Then go to Step 4.

Fig 6: Identifying Connector C-145
Courtesy of DAIMLERCHRYSLER CORPORATION

Fig 7: Identifying Connector D-23
Courtesy of DAIMLERCHRYSLER CORPORATION
STEP 4. Check the DTC.
Q: Is DTC 86 set?

YES : Return to Step 1.

NO: The procedure is complete (If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to TO COPE WITH INTERMITTENT MALFUNCTION ).