B1662

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1662/45: Indicator Light Circuit Malfunction
B1662/45 - Indicator Light Circuit Malfunction

DESCRIPTION

The indicator light circuit consists of the center airbag sensor assembly and the combination meter.

When the center airbag sensor assembly detects a malfunction in the SRS airbag system, the SRS warning light comes on to inform the driver.

It also comes on when the source voltage drops, and automatically goes off in approximately 10 seconds after the source voltage returns to normal (DTC is not stored).

The SRS warning light comes on for 6 seconds after the ignition switch is turned on (IG) and goes off in the system is normal.

When an open circuit is detected, such as when the connector between the combination meter and the center airbag sensor assembly is disconnected, the SRS warning light remains on even when approximately 6 seconds elapsed after the ignition switch is turned on (IG).

DTC B1662/45 is recorded when a malfunction is detected in the indicator light circuit.





HINT
When DTC B1662/45 and B1000/31 are output simultaneously, perform the troubleshooting for DTC B1662/45 first.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK BATTERY

(a) Measure the voltage of the battery.

Standard voltage:

11 to 14 V

NG -- REPLACE BATTERY
OK -- Continue to next step.

2. CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Check that the connectors are properly connected to the center airbag sensor assembly and the combination meter.

OK:

The connectors are connected.

NG -- CONNECT CONNECTORS, THEN GO TO STEP 1
OK -- Continue to next step.

3. CHECK COMBINATION METER

(a) Disconnect the connectors from the center airbag sensor assembly.

(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

(c) Turn the ignition switch on (IG), check the operation of the SRS warning light.

OK:

The SRS warning light comes on.

NG -- GO TO COMBINATION METER SYSTEM
OK -- Continue to next step.

4. CHECK INSTRUMENT PANEL WIRE

(a) Disconnect the connector from the combination meter.





(b) Measure the resistance according to the value(s) in the table below.





Standard resistance:





NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY