B1660

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1660/43: Passenger Airbag ON/OFF Indicator Circuit Malfunction

DTC B1660/43 - Passenger Airbag ON/OFF Indicator Circuit Malfunction

DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor and the passenger airbag ON/OFF indicator.
The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag, front passenger side knee airbag, front seat side airbag RH and front seat outer belt RH.
DTC B1660/43 is recorded when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

(a) Turn the engine switch on (IG).
(b) Check the passenger airbag ON/OFF indicator operation.
HINT: Refer to the normal condition of the passenger airbag ON/OFF indicator Diagnosis System.

Result

B -- CHECK CONNECTION OF CONNECTORS
A -- Continue to next step.

2. CHECK CONNECTION OF CONNECTORS
(a) Turn the engine 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 and the multi-display.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

3. CHECK CONNECTORS
(a) Disconnect the connectors from the center airbag sensor and the multi-display.
(b) Check that the connectors (on the center airbag sensor side and multi-display side) are not damaged.
OK:
The connectors are not deformed or damaged.
NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the connector to the multi-display.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Turn the engine switch on (IG).
(d) Check the passenger airbag ON/OFF indicator operation.
OK:
The passenger airbag ON/OFF indicator does not come on.
NG -- CHECK INSTRUMENT PANEL WIRE
OK -- Continue to next step.

5. CHECK CENTER AIRBAG SENSOR

(a) Connect the connector to the center airbag sensor.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Turn the engine switch on (IG), and wait for at least 60 seconds.
(d) Clear the DTCs DTC Check / Clear.
(e) Turn the engine switch off.
(f) Turn the engine switch on (IG), and wait for at least 60 seconds.
(g) Check for DTCs DTC Check / Clear.
OK:
DTC B1660/43 is not output.
HINT: Codes other than DTC B1660/43 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
6. CHECK INSTRUMENT PANEL WIRE

(a) Turn the engine switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the multi-display.
(d) Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.
NOTE:
Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
(e) Measure the resistance of the wire harness side connector.
Standard resistance:

(f) Disconnect the service wire from connector B.
(g) Measure the resistance of the wire harness side connector.
Standard resistance:

(h) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(i) Turn the engine switch on (IG).
(j) Measure the voltage of the wire harness side connectors.
Standard voltage:

OK -- REPLACE MULTI-DISPLAY ASSEMBLY
NG -- REPLACE INSTRUMENT PANEL WIRE
7. CHECK CONNECTION OF CONNECTORS
(a) Turn the engine 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 and the multi-display.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

8. CHECK CONNECTORS
(a) Disconnect the connectors from the center airbag sensor and the multi-display.
(b) Check that the connectors (on the center airbag sensor side and multi-display side) are not damaged.
OK:
The connectors are not deformed or damaged.
NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

9. CHECK INSTRUMENT PANEL WIRE

(f) Disconnect the service wire from connector B.
(g) Measure the resistance of the wire harness side connectors.
Standard resistance:

NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

10. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)

(a) Connect the connectors to the center airbag sensor.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Turn the engine switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NG -- REPLACE HARNESS AND CONNECTOR (PASSENGER AIRBAG ON/OFF INDICATOR - BATTERY) OR BATTERY
OK -- Continue to next step.

11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Turn the engine switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Connect the connector to the multi-display.
(d) Disconnect the connectors from the center airbag sensor.
(e) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(f) Turn the engine switch on (IG).
(g) Check the indicator according to the value(s) in the table below.
Result:

NG -- REPLACE MULTI-DISPLAY ASSEMBLY
OK -- Continue to next step.

12. CHECK CENTER AIRBAG SENSOR

(a) Turn the engine switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Connect the connectors to the center airbag sensor.
(d) Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
(e) Turn the engine switch on (IG), and wait for at least 60 seconds.
(f) Clear the DTCs DTC Check / Clear.
(g) Turn the engine switch off.
(h) Turn the engine switch on (IG), and wait for at least 60 seconds.
(i) Check for DTCs DTC Check / Clear.
OK:
DTC B1660/43 is not output.
HINT: Codes other than DTC B1660/43 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