Toyota 4Runner: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
HINT:
- When DTC B1650/32 is stored as a result of troubleshooting for the airbag system, perform troubleshooting for the occupant classification system as shown in the chart below.
- Use the Techstream to read and clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be read and cleared.
|
DTC Code |
Detection Item |
Trouble Area |
Passenger Airbag ON/OFF Indicator (OFF) |
See page |
|---|---|---|---|---|
|
B1771 |
Passenger Side Buckle Switch Circuit Malfunction |
- Front seat inner belt RH (Front passenger side buckle switch) - Front seat wire RH - Occupant classification ECU |
On |
|
|
B1780 |
Front Occupant Classification Sensor LH Circuit Malfunction |
- Separate type front seat cushion spring RH (Front occupant classification sensor LH) - Front seat wire RH - Occupant classification ECU |
On |
|
|
B1781 |
Front Occupant Classification Sensor RH Circuit Malfunction |
- Separate type front seat cushion spring RH (Front occupant classification sensor RH) - Front seat wire RH - Occupant classification ECU |
On |
|
|
B1782 |
Rear Occupant Classification Sensor LH Circuit Malfunction |
- Separate type front seat cushion spring RH (Rear occupant classification sensor LH) - Front seat wire RH - Occupant classification ECU |
On |
|
|
B1783 |
Rear Occupant Classification Sensor RH Circuit Malfunction |
- Separate type front seat cushion spring RH (Rear occupant classification sensor RH) - Front seat wire RH - Occupant classification ECU |
On |
|
|
B1785 |
Front Occupant Classification Sensor LH Collision Detection |
- Separate type front seat cushion spring RH (Front occupant classification sensor LH) - Occupant classification ECU |
On |
|
|
B1786 |
Front Occupant Classification Sensor RH Collision Detection |
- Separate type front seat cushion spring RH (Front occupant classification sensor RH) - Occupant classification ECU |
On |
|
|
B1787 |
Rear Occupant Classification Sensor LH Collision Detection |
- Separate type front seat cushion spring RH (Rear occupant classification sensor LH) - Occupant classification ECU |
On |
|
|
B1788 |
Rear Occupant Classification Sensor RH Collision Detection |
- Separate type front seat cushion spring RH (Rear occupant classification sensor RH) - Occupant classification ECU |
On |
|
|
B1790 |
Center Airbag Sensor Assembly Communication Circuit Malfunction |
- Floor wire - Front seat wire RH - Occupant classification ECU - Center airbag sensor |
On |
|
|
B1793 |
Occupant Classification Sensor Power Supply Circuit Malfunction |
- Separate type front seat cushion spring RH (Occupant classification sensors) - Front seat wire RH - Occupant classification ECU |
On |
|
|
B1794 |
Open in Occupant Classification ECU Battery Positive Line |
- Harness or connector - Occupant classification ECU |
On |
|
|
B1795 |
Occupant Classification ECU Malfunction |
Occupant classification ECU |
On |
|
|
B1796 |
Sleep Operation Failure of Occupant Classification ECU |
Occupant classification ECU |
On |
|
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Sleep Operation Failure of Occupant Classification ECU (B1796)
DESCRIPTION
During sleep mode, the occupant classification ECU monitors the condition of
each sensor while the ignition switch is off. In this mode, if the occupant classification
ECU detects an ...
Occupant Classification Sensor Power Supply Circuit Malfunction (B1793)
DESCRIPTION
The occupant classification sensor power supply circuit consists of the occupant
classification ECU and occupant classification sensors.
DTC B1793 is stored when a malfunction is detec ...
Other materials about Toyota 4Runner:
Disassembly
DISASSEMBLY
PROCEDURE
1. INSPECT DIFFERENTIAL RING GEAR BACKLASH
(a) Using SST and a dial indicator, measure the ring gear backlash.
SST: 09564-32011
Standard backlash:
0.11 to 0.21 mm (0.00433 to 0.00827 in.)
If the backlash is not as specified, adj ...
Precaution
PRECAUTION
1. IGNITION SWITCH EXPRESSION
HINT:
The type of ignition switch used on this model differs according to the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ign ...
0.0269