B1662
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1662/45: Indicator Light Circuit Malfunction
DTC B1662/45 - Indicator Light Circuit Malfunction
DESCRIPTION
The indicator light circuit consists of the center airbag sensor assembly and the combination meter. DTC B1662/45 is set when a malfunction is detected in the indicator light circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTE: In order to prevent unexpected airbag deployment, disconnect the following connectors before inspecting parts such as wire harnesses, if the application of tester probes to the center airbag sensor assembly connector is necessary.
1. Turn the ignition switch to the lock position.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Disconnect the connector from the center airbag sensor assembly.
4. Disconnect the connectors from the steering pad.
5. Disconnect the connectors from the front passenger airbag assembly.
6. Disconnect the connector from the front seat outer belt assembly LH.
7. Disconnect the connector from the front seat outer belt assembly RH.
8. Disconnect the connector from the front seat side airbag assembly LH.
9. Disconnect the connector from the front seat side airbag assembly RH.
10. Disconnect the connector from the curtain shield airbag assembly LH.
11. Disconnect the connector from the curtain shield airbag assembly RH.
PROCEDURE
1. CHECK CONNECTOR (INSTRUMENT PANEL WIRE - CENTER AIRBAG SENSOR ASSEMBLY)
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the instrument panel wire connector from the center airbag sensor assembly.
(d) Check the instrument panel wire connector and terminals (on the center airbag sensor assembly side) and check that the connector is properly connected to the center airbag sensor assembly.
Result:
C -- CONNECT CONNECTOR PROPERLY
B -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
A -- Continue to next step.
2. CHECK CONNECTOR (INSTRUMENT PANEL WIRE - COMBINATION METER)
(a) Disconnect the instrument panel wire connector from the combination meter.
(b) Check the instrument panel wire connector and terminals (on the combination meter side) and check that the connector is properly connected to the combination meter.
Result:
C -- CONNECT CONNECTOR PROPERLY
B -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
A -- Continue to next step.
3. CHECK INSTRUMENT PANEL WIRE
(a) Disconnect the connectors from the center airbag sensor assembly and combination meter assembly.
(b) Check for short to B+ in the circuit.
(1) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(2) Turn the ignition switch to ON.
(3) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
(c) Check for open in the circuit.
(1) Turn the ignition switch off.
(2) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(d) Check for short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
4. CHECK SRS WARNING LIGHT CIRCUIT
(a) Connect the instrument panel wire to the center airbag sensor assembly.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- CHECK CENTER AIRBAG SENSOR ASSEMBLY
OK -- REPLACE COMBINATION METER ASSEMBLY
5. CHECK CENTER AIRBAG SENSOR ASSEMBLY
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the center airbag sensor assembly Removal.
HINT: Perform the inspection using parts from a normal vehicle when possible.
(d) Connect the connectors to the center airbag sensor assembly and the combination meter.
(e) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Clear the DTCs stored in the memory DTC Check / Clear.
(h) Turn the ignition switch off
(i) Turn the ignition switch to ON, and wait for at least 60 seconds.
(j) Check for DTCs DTC Check / Clear.
OK:
DTC B1662/45 is not output.
HINT: DTCs other than B1662/45 may be output at this time, but they are not related to this check.
NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- USE SIMULATION METHOD TO CHECK