[52B] SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - - TROUBLESHOOTING - DIAGNOSTIC TROUBLE CODE PROCEDURES - Diagnosis code 75: Side Air bag Module (RH) (Squib) System Fault Power Supply Circuit (Short-Circuited to Power Supply) | PRINT PAGE / INDEX / PRIOR / NEXT

Diagnosis code 75: Side Air bag Module (RH) (Squib) System Fault Power Supply Circuit (Short-Circuited to Power Supply)
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 (RH) (squib).
PROBABLE CAUSES Damaged wiring harnesses or connectors Short to the power supply in the side air bag module (RH) (squib) harness Malfunction of the SRS-ECU
| DIAGNOSIS PROCEDURE
| STEP 1. Check the side air bag module (RH) (Check whether the diagnosis code is reset). Disconnect the negative battery terminal. Disconnect the side air bag module (RH) connector D-40.
| 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-40 harness side connector by backprobing. Connect the negative battery terminal. Erase the diagnosis code memory, and check the diagnosis code. Q: Is diagnosis code 75 set? YES: Go to Step 2. NO: Replace the seat back assembly of the front seat (RH) (Refer to GROUP 52A - Front Seat ). Then go to Step 3.
| STEP 2. Check the side air bag module (RH) circuit at the SRS-ECU connector C-114. Disconnect SRS-ECU connector C-114. DANGER To prevents the air bag from deploying unintentionally, disconnect the side air bag module (RH) connector D-40 to short the squib circuit. Disconnect side air bag module (RH) connector D-40. Turn the ignition switch to the "ON" position.
| CAUTION Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened. Measure the voltage between C-114 harness side connector terminals 23 and 24 and body earth. OK: 0 V Q: Is the check result normal? YES: Erase the diagnosis code memory, and check the diagnosis code. If diagnosis code 75 sets, replace the SRS-ECU (Refer to ). Then go to Step 4 . NO: Go to Step 3.
| STEP 3. Check the harness wires for short circuit to power supply between SRS-ECU connector C-114 (terminal No.23 and 24) and side air bag module (RH) connector D-40 (terminal No.1 and 2). Q: Are the harness wires between SRS-ECU connector C-114 (terminal No.23 and 24) and side air bag module (RH) connector D-40 (terminal No.1 and 2) in good condition? YES: Go to Step 4. NO: Repair the harness wires between SRS-ECU connector C-114 and side air bag module (RH) connector D-40. Then go to Step 4.
| STEP 4. Check whether the diagnosis code is reset. Q: Is diagnosis code 75 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 .

[52B] SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - - TROUBLESHOOTING - DIAGNOSTIC TROUBLE CODE PROCEDURES - Diagnosis code 75: Side Air bag Module (RH) (Squib) System Fault Power Supply Circuit (Short-Circuited to Power Supply) | PRINT PAGE / INDEX / PRIOR / NEXT

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