Toyota RAV4 1999 Manual page 33

1. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG
SYSTEM. Leave right front air bag sensor connected.
2. Measure resistance between air bag sensor assembly connector C20, terminals No. 9 (circuit SR+,
Black/White wire) and No. 20 (circuit SR-, Brown/White wire). See Fig. 16 . If resistance is 754-886
ohms, go to next step. If resistance is not 754-886 ohms, go to step 6).
3. Measure resistance between ground and air bag sensor assembly connector C20, terminal No. 9 (circuit
SR+, Black/White wire). If resistance is more than one megohm, go to next step. If resistance is less than
one megohm, go to step 9).
4. Connect negative battery cable. Wait 2 seconds. Measure voltage between ground and air bag sensor
assembly connector C20, terminal No. 9 (circuit SR+, Black/White wire). If voltage is less than one volt,
go to next step. If voltage is more than one volt, go to step 11).
5. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds.
Connect air bag sensor assembly connector C20. Connect negative battery cable. Wait at least 20 seconds.
Turn ignition switch to ACC or ON position. Clear DTCs. See CLEARING CODES under DIAGNOSIS
& TESTING. Turn ignition switch to LOCK position. Wait at least 20 seconds. Turn ignition switch to
ACC or ON position. Wait at least 20 seconds. Retrieve codes. See RETRIEVING CODES under
DIAGNOSIS & TESTING. If DTC 15/B1156 or B1157 is displayed, replace air bag sensor assembly. If
DTC 15/B1156 or B1157 is not displayed, system is functioning properly at this time. Check for
intermittent fault. See
6. Disconnect right front air bag sensor connector. See FRONT AIR BAG SENSOR under REMOVAL &
INSTALLATION . Measure resistance across sensor terminals. If resistance is 754-886 ohms, go to next
step. If resistance is not 754-886 ohms, replace right front air bag sensor.
7. Disconnect right front air bag sensor Yellow 2-pin sub-harness connector. Connector is located at right
kick panel. See Fig. 4 . Measure resistance between Black/White and Brown/White wires of air bag
sensor assembly side of right front air bag sensor harness connector. If resistance is more than one
megohm, go to next step. If resistance is less than one megohm, repair or replace front air bag sensor sub-
harness between sensor and kick panel.
8. Connect jumper wire between Black/White and Brown/White wires of front air bag sensor side of sub-
harness connector located at right kick panel. Measure resistance between Black/White and Brown/White
wires of air bag sensor assembly side of front air bag sensor harness connector. If resistance is more than
one ohm, repair or replace sub-wire harness between sensor and kick panel. If resistance is less than one
ohm, repair or replace wire harness or connector between air bag sensor assembly and sub-wire harness.
9. Disconnect right front air bag sensor connector. See FRONT AIR BAG SENSOR under REMOVAL &
INSTALLATION . Measure resistance between ground and air bag sensor assembly connector C20,
terminal No. 9 (circuit SR+, Black/White wire). Measure resistance between ground and air bag sensor
assembly connector C20, terminal No. 20 (circuit SR-, Brown/White wire). If resistance is less than one
megohm, go to next step. If resistance is more than one megohm, replace right front air bag sensor.
10. Disconnect right front air bag sensor Yellow 2-pin sub-harness connector. Connector is located at right
kick panel. See Fig. 4 . Measure resistance between ground and Black/White and Brown/White wires of
front air bag sensor side of sub-harness kick panel connector individually. If resistance is more than one
megohm, repair or replace harness or connector between air bag sensor assembly and sub-harness. If
resistance is less than one megohm, replace sub-harness between sensor and kick panel.
11. Disconnect right front air bag sensor connector. Measure voltage between ground and air bag sensor
assembly connector C20, terminal No. 9 (circuit SR+, Black/White wire). Measure voltage between
ground and air bag sensor assembly connector C20, terminal No. 20 (circuit SR-, Brown/White wire). If
1999 Toyota RAV4
AIR BAG RESTRAINT SYSTEM 1999 Toyota
AIR BAG WARNING LIGHT INTERMITTENT under DIAGNOSTIC TESTS.