B1410 – Passenger’s (front) air bag module (squib) system (short- circuited between terminals of the squib circuit) MMC Colt

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OPERATION

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

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

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DIAGNOSIS CODE SET CONDITIONS

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PROBABLE CAUSES

Improper engaged connector or defective short spring*

Short circuit between the passenger’s (front) air bag module (squib) circuit terminals

Damaged connector(s)

Malfunction of the SRS-ECU

Malfunction of the passenger’s air bag cut off switch

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DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.

Q. Is the CAN bus line found to be normal?

STEP 2. Check whether the diagnosis code is reset.

Q. Is the diagnosis code set?

STEP 3. Check the passenger’s air bag cut off switch.

Q. Is the diagnosis code set?

STEP 4. Check SRS-ECU connector B-109 and passenger’s (front) air bag module connector B-10 (M.U.T.-III diagnosis code).

Q. Is diagnosis code B1410 set?

STEP 5. Check the passenger’s (front) air bag module (M.U.T.-III diagnosis code).

Q. Is diagnosis code B1410 set?

STEP 6. Resistance measurement at the SRS-ECU connector B-109.

Q. Is the check result normal?

STEP 7. Check whether the diagnosis code is reset.

Q. Is diagnosis code B1410 set?