airbag tests
OK ACE, and SHOSKI90, I'll post the tests for 5 flashes then for 10 flashes of the ABS light.
A couple of safety considerations need to be pointed out first.
KEEP ALL PARTS OF YOUR BODY OUT OF IN FRONT OF THE AIRBAG. CARRY IT FACING AWAY FROM YOU, AND FACING UPWARD. SET IT DOWN FACING UPWARD. MAKE SURE YOU GROUND OFF ANY STATIC ELECTRICITY (touch something metal that is grounded or zap the dog) BEFORE TOUCHING THE AIR BAG.
NEVER PROBE THE CONNECTORS ON THE AIRBAG.
The instructions "DISCONNECT" always refers to a connector. NEVER DETACH a component from the vehicle when instructed to "disconnect".
Reconnect means to connect the component you disconnected, for example a sensor.
REACTIVATE SYSTEM means connect everything, including the air bag, and lastly the battery. Check( VERIFY) the air bag lamp means put the key in the KOEO position and see if the lamp stays on for a few seconds (4 to 8 sec) and then goes out, or it flashes a code.
All resistance checks must be made with the negative lead of the ohmmeter at vehicl ground NOT BATTERY GROUND, unless specifically directed otherwise. Three places are recommended; the metal bracket of the starter relay, the ignition lock cylinder on the steering colmn, or a good ground wire from the wire harness under the instrument panel.
NONE of the components are servicable, but rather must be replaced.
The jumper wire that jumpers the clockspring/airbag terminals (on the 90) goes from the wire 614 Gray/orange to 615 Pink (the two outer ends). This jumper wire is necessary to test the system without the airbag in place. The jumper wire is part of the DEACTIVATION process.
Test # 1 With the ignition off "DEACTIVATE" the airbag system as discussed above.
With the jumper wire in place, reinstall the back-up power supply and connect the battery. Put the ignition switch in the run position (KOEO) and verify the AIRBAG light. does it flash 5 times?
YES? we go to the next test.
NO? Dissconnect the batery, the back-up power supply, and replace the airbag. Reconnect and reactivate the airbag system. Verify the airbag lamp. (KOEO) If the light flashes 10 times, REPLACE the Diagnostic Monitor.
AGAIN, ANYTIME YOU REPLACE ANY AIRBAG COMPONENT DEACTIVATE THE SYSTEM. DO NOT SKIP A STEP IN THE DEACTIVATION PROCESS.
step 2 DEACTIVATE the system
DISCONNECT ALL front (crash)sensors (left, right, center)
Verify the airbag lamp (KOEO)
5 flashes go to step 3
10 flashes go to step 4
Airbag lamp does not flash either 5 or 10. Replace Diagnostic Monitor.
Reconnect the system (sensors) and verify the airbag lamp (KOEO)
If the lamp works correctly reactivate the system.
test 3. Check resistance of front sensors
Check for intermittent shorts in circuits 617 and 619
perform all three of the following tests;
Attach an ohmmeter to ground and to the appropriate pin on each front sensor connector
right sensor circuit 617 pin #17 wire color PK/orange stripe (PK/O)
Left sensor circuit 621 pin # 19 PK/O
Center Sensor circuit 619 pin # 18 PK/White stripe
Resistance should be between 1000 and 1300 ohms for each sensor. If it is REPLACE the diagnostic monitor, reconnect (not reactivate-yet) the system and verify the airbag lamp. If OK, REACTIVATE the system. Remember to connect the battery LAST and make sure the back-up power has had time to drain or "bleed off" its "juice" befor installing the airbag.
If ohms are not as specified replace the faulty sensor, verify the airbag light. If the lamp still flashes code 10 install a new diagnostic monitor, reactivate the system, and verify the airbag lamp.
Test 4.
Disconnect the diagnostic monitor and perform the following three tests.
Attach an ohm meter to ground and to the appropriate pin on the diagnostic monitor wiring connector;
pin #17 circuit 617 wire PK/O (pink/orange tracer)
Pin # 18 circuit 619 wire PK/W (pink/white)
pin # 19 circuit 621 W/Y (white/yellow)
Is the resistance less than 1 ohm for any test?
YES - trace the circuit(s) to find contact to ground and service(repair)
reconnect system and verify the airbag lamp If lamp flashes fault code 10 - replace the diagnosyic monitor. Reactivate the system and verify the airbag lamp.
NO - Resistance is 1 ohm or greater - go to next test.
Test 5. Check circuit 615 (Gray/White) between monitor and driver air bag.
Remove jumper wire from the connector (from clockspring to the air bag) and leave open.
Fault code should change either code 4 or code 6
CODE 6 Go to next test (6)
CODE 4 Go to test 7.
TEST 6. Check Clockspring
Short to ground in circuit 615 GRAY/White between driver air bag and diagnostic monitor,
Disconnect clockspring connector to 14401 at base of the steering colmn,
Jumper wire connector circuits 614 (gray/orange) and 615 (gray/white),
Verify air bag lamp. Does lamp flash code 6?
YES Trace and service circuit 615 short to ground between clockspring and diagnostic monitor. If code 10 is present, or no short exists, REPLACE diagnostic monitor.
NO - Lamp goes out Replace clockspring. Reconnect system (not reactivate). If code 10 is present replace monitor and verify airbag lamp.
TEST 7. Short in circuit 614 (gray/orange) or 623 (Purple/white) Check circuit 614.
Disconnect rear safing sensor
With an ohm meter check circuit 614(GY/O) pin 11 and ground
Is resistance less than 1 ohm?
Yes - A short to ground exisists in circuit 614 (GY/O) between safing sensors, air bag, and pin 11 of the diagnostic monitor. Trace short to ground.
Repair as required. RECONNECT and REACTIVATE the system. VERIFY the lamp. IF no short is found, or code 10 is present, replace the diagnostic module.
NO. - go to test 8. (DEACTIVATE THE SYSTEM)
TEST 8 CHECK CIRCUIT 623 (P/W) pin 12
With an ohm meter check circuit 623 (P/W) pin 12 and ground
Is resistance less than 1 ohm?
YES - Trace short to ground in circuit 623 (P/W). Repair as required. Reconnect and reactivate the system. Verify lamp. If code 10 exists replace the diagnostic monitor.
NO - Go to test 9
TEST 9.CHECK REAR SAFING SENSOR
With an ohm meter check circuit 623 (P/W) in sensor connector and ground (with sensor attached to vehicle)
Is resistance less than 1 ohm?
Yes - Replace rear safing sensor. If code 10 exists replace diagnostic monitor, reconnect systems and reactivate. Verify air bag lamp.
NO. - Replace diagnostic monitor Reconnect and reactivate the system and verify air bag lamp.
END of TESTS for FIVE FLASHES.
NEXT TESTS FOR TEN FLASHES, but first I need a cold one. Molsons please!
I'll post the rest of the test later today. (Tomorrow for those of you on the West Coast) rangerj :corn:
Before I go on with the posting of the code 10 diagnostics is there an interest in my doing that? Is this information useful to anyone? If anyone needs this information I'll post it.
