Diagnosis code 82: Side Air bag Module (LH) (Squib) System Fault 2 (Open in the Squib Circuit)

OPERATION

The SRS-ECU judges how severe a collision is by detecting signals from the left and right side impact sensors. If the impact is over a predetermined level, the SRS-ECU outputs an ignition signal. At this time, if the side air bag safing G-sensor is on, the SRS side air bag will inflate.

The ignition signal is input to the side air bag module to inflate the side air bag.

DIAGNOSIS CODE SET CONDITIONS

This diagnosis code is set if there is abnormal resistance between the input terminals of the side air bag module (LH) (squib).

PROBABLE CAUSES

Open circuit in the side air bag module (squib) (LH) circuit

Improper connector contact

Malfunction of the SRS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the side air bag module (LH) (Check whether the diagnosis code is reset).

Disconnect the negative battery terminal.

Disconnect the side air bag module (LH) connector D-08.

Connect special tool dummy resistor (MB991865) to special tool resistor harness (MB991866).

CAUTION

Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened.

Insert special tool (MB991866) into the D-08 harness side connector by backprobing.

Connect the negative battery terminal.

Erase diagnosis code memory, and then check the diagnosis code.

Q: Is diagnosis code 82 set?

YES: Go to Step 2

.
NO: Replace the seat back assembly of the front seat (LH) (Refer to GROUP 52A - Front Seat

). Then go to Step 3

STEP 2. Check the harness for open circuit between the SRS-ECU connector C-114 (terminal No.21 and 22) and the side air bag module (LH) connector D-08 (terminal No.1 and 2).

Disconnect SRS-ECU connector C-114.

Disconnect side air bag module (LH) connector D-08.

CAUTION

Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened.

Check for continuity between the following terminals.

SRS-ECU connector C-114 (terminal No.21) and the side air bag module (LH) connector D-08 (terminal No.1)

SRS-ECU connector C-114 (terminal No.22) and the side air bag module (LH) connector D-08 (terminal No.2)

OK: Less than 2 Ω

Q: Are the check results normal?

YES: Erase the diagnosis code memory, and check the diagnosis code. If diagnosis code 82 sets, replace the SRS-ECU (Refer to

). Then go to Step 3

.
NO: Repair the harness wires between SRS-ECU connector C-114 and side air bag module (LH) connector D-08. Then go to Step 3

STEP 3. Check whether the diagnosis code is reset.

Q: Is diagnosis code 82 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 GROUP 00 - How to Use Troubleshooting/Inspection Service Points


Diagnosis code 82: Side Air bag Module (LH) (Squib) System Fault 2 (Open in the Squib Circuit)

OPERATION The SRS-ECU judges how severe a collision is by detecting signals from the left and right side impact sensors. If the impact is over a predetermined level, the SRS-ECU outputs an ignition signal. At this time, if the side air bag safing G-sensor is on, the SRS side air bag will inflate. The ignition signal is input to the side air bag module to inflate the side air bag.
DIAGNOSIS CODE SET CONDITIONS This diagnosis code is set if there is abnormal resistance between the input terminals of the side air bag module (LH) (squib).
PROBABLE CAUSES Open circuit in the side air bag module (squib) (LH) circuit Improper connector contact Malfunction of the SRS-ECU
	DIAGNOSIS PROCEDURE

	STEP 1. Check the side air bag module (LH) (Check whether the diagnosis code is reset). Disconnect the negative battery terminal. Disconnect the side air bag module (LH) connector D-08.
	Connect special tool dummy resistor (MB991865) to special tool resistor harness (MB991866). CAUTION Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened. Insert special tool (MB991866) into the D-08 harness side connector by backprobing. Connect the negative battery terminal. Erase diagnosis code memory, and then check the diagnosis code. Q: Is diagnosis code 82 set? YES: Go to Step 2. NO: Replace the seat back assembly of the front seat (LH) (Refer to GROUP 52A - Front Seat ). Then go to Step 3.
	STEP 2. Check the harness for open circuit between the SRS-ECU connector C-114 (terminal No.21 and 22) and the side air bag module (LH) connector D-08 (terminal No.1 and 2). Disconnect SRS-ECU connector C-114. Disconnect side air bag module (LH) connector D-08.
	CAUTION Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened. Check for continuity between the following terminals. SRS-ECU connector C-114 (terminal No.21) and the side air bag module (LH) connector D-08 (terminal No.1) SRS-ECU connector C-114 (terminal No.22) and the side air bag module (LH) connector D-08 (terminal No.2) OK: Less than 2 Ω Q: Are the check results normal? YES: Erase the diagnosis code memory, and check the diagnosis code. If diagnosis code 82 sets, replace the SRS-ECU (Refer to ). Then go to Step 3 . NO: Repair the harness wires between SRS-ECU connector C-114 and side air bag module (LH) connector D-08. Then go to Step 3.
	STEP 3. Check whether the diagnosis code is reset. Q: Is diagnosis code 82 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 GROUP 00 - How to Use Troubleshooting/Inspection Service Points .