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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 420 (On-Board Diagnostic (Air Bag System - Two-Step Deployment Control System)) >> DTC B1884, B1890: Passenger Air Bag Deactivation (PAD) Indicator Circuit Open Or Short To Body Ground; Passenger Air Bag Deactivation (PAD) Indicator Circuit Short To Power Supply >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - DTC B1884, B1890

STEP INSPECTION ACTION
1 INSPECT OPERATION OF PAD INDICATOR 
  • Turn the ignition switch to the ON position.
  • Does the PAD indicator illuminate?
 Yes Go to the next step.
No Go to Step 6.
2 INSPECT FUSE 
  • Remove the SAS 10 A fuse.
  • Is the fuse normal?
 Yes Install the fuse, then go to the next step.
No Replace the fuse.
3 INSPECT BATTERY 
  • Measure the battery positive voltage.
  • Is the voltage 9 V-16 V? 
 Yes Go to the next step.
No Battery is malfunctioning Inspect the charge/discharge system.
4 INSPECT WIRING HARNESS BETWEEN BATTERY AND PAD INDICATOR 
  • Turn the ignition switch to the ON position.
  • Measure the PAD indicator terminal A voltage.
  • Is the voltage 9 V or more? 
 Yes Go to the next step.
No Repair the wiring harness between the battery and PAD indicator.
5 INSPECT PAD INDICATOR 
  • Ground PAD indicator connector terminal B using a jumper wire.
  • Turn the ignition switch to the ON position.
  • Does the PAD indicator illuminate?
 Yes Go to the next step.
No Replace the air bag wiring harness.
6 INSPECT WIRING HARNESS BETWEEN PAD INDICATOR AND SAS CONTROL MODULE 
WARNING:
  • Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner front buckles, which may seriously injure you. Read the service warnings before handling the air bag system components.

    (See SERVICE WARNINGS .)

    (See SERVICE CAUTIONS .)

  • Turn the ignition switch to the LOCK position.
  • Disconnect the negative battery cable and wait for 1 min or more  .
  • Remove the column cover.
  • Disconnect the clock spring connector.
  • Disconnect the passenger-side air bag module connector.
  • Disconnect the front seat connector.
  • Partially peel back the floor covering.
  • Disconnect the SAS control module connector.
  • Inspect the wiring harness between PAD indicator terminal B and SAS control module terminal 1U for the following:
    • Short to ground
    • Short to power supply
    • Open circuit
  • Is the wiring harness normal?
 Yes [Present malfunction diagnosis] 
[Past malfunction diagnosis] 
  • DTC troubleshooting completed.
No Replace the air bag wiring harness.
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