B1152

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1152/28: Passenger Airbag ON/OFF Indicator Circuit Malfunction

DTC B1152/28 - Passenger Airbag ON/OFF Indicator Circuit Malfunction

DESCRIPTION

The passenger airbag ON/OFF indicator light circuit consists of the center airbag sensor assembly and passenger airbag ON/OFF indicator. This circuit indicates the operation condition of the front passenger airbag assembly, the front seat airbag assembly RH and front seat belt pretensioner RH.
DTC B1152/28 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 ignition switch to the ON position.
(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 ignition switch to the LOCK position.
(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 telltale light assembly.
OK:
The connectors are connected.
NG -- CONNECT CONNECTORS
OK -- Continue to next step.
3. CHECK CONNECTORS
(a) Disconnect the connectors from the center airbag sensor assembly and the telltale light assembly.
(b) Check that the connectors (on the center airbag sensor assembly side and the telltale light assembly side) are not damaged.
OK:
The connectors are not deformed or damaged.
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the connector to the telltale light assembly.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Turn the ignition switch to the ON position.
(d) Check the passenger airbag ON/OFF indicator operation.
OK:
The passenger airbag ON/OFF indicator ("ON" and "OFF") does not come on.
NG -- CHECK INSTRUMENT PANEL WIRE (OPEN)
OK -- Continue to next step.
5. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Connect the connector to the center airbag sensor assembly.
(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(f) Clear the DTCs stored in memory DTC Check / Clear.
(g) Turn the ignition switch to the LOCK position.
(h) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(i) Check the DTCs DTC Check / Clear.
OK:
DTC B1152/28 is not output.
HINT: Codes other than code B1152/28 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 (OPEN)

(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connector from the telltale light assembly.
(d) Using a service wire, connect A28-1 (P-AB) and A28-25 (PAON) of connector "B".
(e) 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.
7. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the SST from connector "B".
(b) 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.
8. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

(a) 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.
9. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPLACE TELLTALE LIGHT ASSEMBLY
10. CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch to the LOCK position.
(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 telltale light assembly.
OK:
The connectors are connected.
NG -- CONNECT CONNECTORS
OK -- Continue to next step.
11. CHECK CONNECTORS
(a) Disconnect the connectors from the center airbag sensor assembly and the telltale light assembly.
(b) Check that the connectors (on the center airbag sensor assembly side and the telltale light assembly side) are not damaged.
OK:
The connectors are not deformed or damaged.
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
12. CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Using a service wire, connect A28-1 (P-AB) and A28-25 (PAON) of connector "B".
(b) 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.
13. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the service wire from connector "B".
(b) 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.
14. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

(a) 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.
15. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
16. CHECK TELLTALE LIGHT ASSEMBLY (POWER SOURCE)

(a) Turn the ignition switch to the ON position.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard:

NG -- REPAIR OR REPLACE WIRE HARNESS (TELLTALE LIGHT ASSEMBLY - BATTERY) OR BATTERY
OK -- Continue to next step.
17. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

NG -- REPLACE TELLTALE LIGHT ASSEMBLY
OK -- Continue to next step.
18. CHECK CENTER AIRBAG SENSOR ASSEMBLY