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Home >> Mazda >> 2007 >> B2300 Standard >> Repair and Diagnosis >> Restraints >> Seat Belts >> Symptom Troubleshooting (Air Bag & Seat Belt) >> Pinpoint Test 6: DTC B2292 - Restraint System Safety Belt PRETENSIONER Fault >> Possible Causes

Possible Causes

A safety belt buckle pretensioner status fault can be caused by:

NOTE:
  • Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the Pinpoint Test.
DTC B2292 - RESTRAINT SYSTEM SAFETY BELT PRETENSIONER FAULT - PINPOINT TEST REFERENCE

PINPOINT TEST 6 DTC B2292 - RESTRAINT SYSTEM SAFETY BELT PRETENSIONER FAULT
STEP INSPECTION ACTION
1 CHECK FOR CONTINUOUS OR ON-DEMAND DTCs
WARNING:
  • Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools could result in injury and possible violation of vehicle safety standards.
WARNING:
  • Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
WARNING:
  • The safety belt pretensioner is a pyrotechnic device. Always wear safety glasses when repairing an air bag equipped vehicle and when handling a safety belt buckle pretensioner or safety belt retractor pretensioner. Never probe a pretensioner electrical connector. Doing so could result in pretensioner or air bag deployment and could result in personal injury.
NOTE:
  • If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be de-powered.
NOTE:
  • After diagnosing or repairing an SRS, the restraint system diagnostic tools must be removed before operating the vehicle over the road.
NOTE:
  • The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
  • Enter the following diagnostic mode on the IDS or equivalent tester: On-Demand Self-Test/Retrieve and Record Continuous Memory DTCs
  • Enter the following diagnostic mode on the IDS or equivalent tester: View and Record DTC B2292 Fault PIDs
  • Was on-demand DTC B2292 retrieved? 
Yes This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self-test.
Using the fault PIDs recorded, GO to the appropriate pinpoint test step.
For driver safety belt pretensioner with a low resistance fault, Go to next step.
For driver safety belt pretensioner with an open circuit fault, Go to next step.
For driver safety belt pretensioner with a short to battery fault, Go to step 6.
For driver safety belt pretensioner with a short to ground fault, Go to step 8.
For passenger safety belt pretensioner with a low resistance fault, Go to step 11.
For passenger safety belt pretensioner with an open circuit fault, Go to step 11.
For passenger safety belt pretensioner with a short to battery fault, Go to step 15.
For passenger safety belt pretensioner with a short to ground fault, Go to step 17.
No This is an intermittent fault. The fault condition is not present at this time. Go to step 21.
2 CHECK THE DRIVER SAFETY BELT BUCKLE PRETENSIONER CIRCUITS RESISTANCE
  • Enter the following diagnostic mode on the IDS or equivalent tester: View and Record DTC B2292 Fault PIDs
  • Enter the following diagnostic mode on the IDS or equivalent tester: Select Driver Pretensioner Resistance PID
  • Is the resistance greater than 3.2 or less than 1.4 ohms? 
Yes If the PID is greater than 3.2 ohms, Go to step 4. If the PID is less than 1.4 ohms, Go to next step.
No INSTALL a new RCM. See RESTRAINTS CONTROL MODULE (RCM) , . Go to step 22.
3 CHECK THE DRIVER SAFETY BELT BUCKLE PRETENSIONER CIRCUIT (L/O) AND CIRCUIT (BR/G) FOR LOW RESISTANCE
  • Key in OFF position.
  • Depower the system. See DEPOWERING AND REPOWERING , .
  • Disconnect: Driver Seat Harness connector C-328
  • Disconnect: RCM connectors 0810-101b and 0810-101a
  • Measure the resistance between driver seat harness connector C-328 pin 5, circuit (BR/G), and C-328 pin 6, circuit (L/O), harness side.
  • Is the resistance greater than 1,000,000 ohms? 
Yes REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, INSTALL a new driver safety belt buckle pretensioner. See SAFETY BELT BUCKLE AND PRETENSIONER - BUCKET AND 40 PERCENT BENCH , . Go to step 22.
No REPAIR circuit (L/O) and circuit (BR/G). Go to step 22.
4 CHECK CIRCUIT (L/O) FOR AN OPEN
  • Depower the system. See DEPOWERING AND REPOWERING , .
  • Disconnect: Driver Seat Harness connector C-328
  • Disconnect: RCM connectors 0810-10 1b and 0810-101a
  • Measure the resistance between RCM connector 0810-101a pin 31, circuit (L/O), harness side and driver seat harness connector C-328 pin 6, circuit (L/O), harness side.
  • Is the resistance less than 0.5 ohm? 
Yes Go to next step.
No REPAIR circuit (L/O). Go to step 22.
5 CHECK CIRCUIT (BR/G) FOR AN OPEN
  • Measure the resistance between RCM connector 0810-101a pin 32, circuit (BR/G), harness side and driver seat harness connector C-328 pin 5, circuit (BR/G), harness side.
  • Is the resistance less than 0.5 ohm? 
Yes REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, INSTALL a new driver safety belt buckle pretensioner. See SAFETY BELT BUCKLE AND PRETENSIONER - BUCKET AND 40 PERCENT BENCH , . Go to step 22.
No REPAIR circuit (BR/G). Go to step 22.
6 CHECK CIRCUIT (L/O) FOR A SHORT TO VOLTAGE
  • Key in OFF position.
  • Depower the system. See DEPOWERING AND REPOWERING , .
  • Disconnect: Driver Seat Harness connector C-328
  • Disconnect: RCM connectors 0810-10 1b and 0810-101a
  • Repower the system. Do not prove out the system at this time. See DEPOWERING AND REPOWERING , .
  • Key in ON position.
  • Measure the voltage between driver seat harness connector C-328 pin 6, circuit (L/O), harness side and ground.
  • Is the voltage less than 0.2 volt? 
Yes Go to next step.
No REPAIR circuit (L/O). Go to step 22.
7 CHECK CIRCUIT (BR/G) FOR A SHORT TO VOLTAGE
  • Measure the voltage between driver seat harness connector C-328 pin 5, circuit (BR/G), harness side and ground.
  • Is the voltage less than 0.2 volt? 
Yes REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, Go to step 20.
No REPAIR circuit (BR/G). Go to step 22.
8 CHECK THE DRIVER SAFETY BELT BUCKLE PRETENSIONER
NOTE:
  • The ignition key must be cycled when carrying out this step. Otherwise the fault PID may not report correctly.
  • Key in OFF position.
  • Depower the system. See DEPOWERING AND REPOWERING , .
  • Disconnect: Driver Seat Harness connector C-328
  • Repower the system. Do not prove out the system at this time. See DEPOWERING AND REPOWERING , .
  • Enter the following diagnostic mode on the IDS or equivalent tester: On-Demand Self-Test/Retrieve and Record Continuous Memory DTCs
  • Enter the following diagnostic mode on the IDS or equivalent tester: View and Record DTC B2292 Fault PIDs
NOTE:
  • When retrieving DTC B2292 with the driver buckle pretensioner disconnected, a fault PID for an open circuit is expected to be retrieved.
  • Was the fault PID for driver pretensioner with a short to ground retrieved? 
Yes Go to next step.
No REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, INSTALL a new driver safety belt buckle pretensioner. See SAFETY BELT BUCKLE AND PRETENSIONER - BUCKET AND 40 PERCENT BENCH , . Go to step 22.
9 CHECK CIRCUIT (L/O) FOR A SHORT TO GROUND
  • Key in OFF position.
  • Depower the system. See DEPOWERING AND REPOWERING , .
  • Disconnect: RCM connectors 0810-10 1b and 0810-101a
  • Measure the resistance between driver seat harness connector C-328 pin 6, circuit (L/O), harness side and ground.
  • Is the resistance greater than 1,000,000 ohms? 
Yes Go to next step.
No REPAIR circuit (L/O). Go to step 22.
10 CHECK CIRCUIT (BR/G) FOR A SHORT TO GROUND
  • Measure the resistance between driver seat harness connector C-328 pin 5, circuit (BR/G), harness side and ground.
  • Is the resistance greater than 1,000,000 ohms? 
Yes REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, Go to step 20.
No REPAIR circuit (BR/G). Go to step 22.
11 CHECK PASSENGER SAFETY BELT BUCKLE PRETENSIONER CIRCUITS RESISTANCE
  • Enter the following diagnostic mode on the IDS or equivalent tester-View and Record DTC B2292 Fault PIDs
  • Enter the following diagnostic mode on the IDS or equivalent tester: Select Passenger Pretensioner Resistance PID
  • Is the resistance greater than 3.2 or less than 1.4 ohms? 
Yes If the PID is greater than 3.2 ohms, Go to step 13.
If the PID is less than 1.4 ohms, Go to next step.
No INSTALL a new RCM. See RESTRAINTS CONTROL MODULE (RCM) , . Go to step 22.
12 CHECK THE PASSENGER SAFETY BELT BUCKLE PRETENSIONER CIRCUIT (BR) AND CIRCUIT (W/O) FOR LOW RESISTANCE
  • Key in OFF position.
  • Depower the system. See DEPOWERING AND REPOWERING ,
  • Passenger Seat Harness connector C-339
  • Disconnect: RCM connectors 0810-10 1b and 0810-101a
  • Measure the resistance between passenger seat harness connector C-339 pin 5, circuit (W/O), and C-339 pin 6, circuit (BR), harness side.
  • Is the resistance greater than 1,000,000 ohms? 
Yes REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, INSTALL a new passenger safety belt buckle pretensioner. See SAFETY BELT BUCKLE AND PRETENSIONER - 60 PERCENT BENCH , . Goto step 22.
No REPAIR circuit (W/O) and circuit (BR). Go to step 22.
13 CHECK CIRCUIT (BR) FOR AN OPEN Depower the system. See DEPOWERING AND REPOWERING , .
  • Key in OFF position.
  • Disconnect: Passenger Seat Harness connector C-339
  • Disconnect: RCM connectors 0810-101b and 0810-101a
  • Measure the resistance between RCM connector 0810-101a pin 33, circuit (BR), harness side and passenger seat harness connector C-339 pin 6, circuit (BR), harness side.
  • Is the resistance less than 0.5 ohm? 
Yes Go to next step.
No REPAIR circuit (BR). Go to step 22.
14 CHECK CIRCUIT (W/O) FOR AN OPEN
  • Measure the resistance between RCM connector 0810-101a pin 34, circuit (W/O), harness side and passenger seat harness connector C-339 pin 5, circuit (W/O), harness side.
  • Is the resistance less than 0.5 ohm? 
Yes REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, INSTALL a new passenger safety belt buckle pretensioner. See SAFETY BELT BUCKLE AND PRETENSIONER - 60 PERCENT BENCH , . Go to step 22.
No REPAIR circuit (W/O). Go to step 22.
15 CHECK CIRCUIT (BR) FOR A SHORT TO VOLTAGE
  • Key in OFF position.
  • Depower the system. See DEPOWERING AND REPOWERING , .
  • Disconnect: Passenger Seat Harness connector C-339
  • Disconnect: RCM connectors 0810-10 1b and 0810-101a
  • Repower the system. Do not prove out the system at this time. See DEPOWERING AND REPOWERING , .
  • Key in ON position.
  • Measure the voltage between passenger seat harness connector C-339 pin 6, circuit (BR), harness side and ground.
  • Is the voltage less than 0.2 volt? 
Yes Go to next step.
No REPAIR circuit (BR). Go to step 22.
16 CHECK CIRCUIT (W/O) FOR A SHORT TO VOLTAGE
  • Measure the voltage between passenger seat harness connector C-339 pin 5, circuit (W/O), harness side and ground.
  • Is the voltage less than 0.2 volt? 
Yes REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, Go to step 20.
No REPAIR circuit (W/O). Go to step 22.
17 CHECK THE PASSENGER SAFETY BELT BUCKLE PRETENSIONER
NOTE:
  • The ignition key must be cycled when carrying out this step. Otherwise the fault may not report correctly.
  • Key in OFF position.
  • Depower the system. See DEPOWERING AND REPOWERING ,
  • Disconnect: Passenger Seat Harness connector C-339
  • Repower the system. Do not  prove out the system at this time. See DEPOWERING AND REPOWERING ,
  • Key in ON position.
  • Enter the following diagnostic mode on the IDS or equivalent tester: On-Demand Self-Test/Retrieve and Record Continuous Memory DTCs
  • Enter the following diagnostic mode on the IDS or equivalent tester: View and Record DTC B2292 Fault PIDs
NOTE:
  • When retrieving DTC B2292 with the passenger buckle pretensioner disconnected, a fault PID for an open circuit is expected to be retrieved.
  • Was on-demand fault PID for passenger pretensioner with a short to ground retrieved? 
Yes Go to next step.
No REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, INSTALL a new passenger safety belt buckle pretensioner. See SAFETY BELT BUCKLE AND PRETENSIONER - 60 PERCENT BENCH , . Go to step 22.
18 CHECK CIRCUIT (BR) FOR A SHORT TO GROUND
  • Key in OFF position.
  • De power the system. See DEPOWERING AND REPOWERING ,
  • Disconnect: RCM connectors 0810-101b and 0810-101a
  • Measure the resistance between passenger seat harness connector C-339 pin 6, circuit (BR), harness side and ground.
  • Is the resistance greater than 1,000,000 ohms? 
Yes Go to next step.
No REPAIR circuit (BR). Go to step 22.
19 CHECK CIRCUIT (W/O) FOR A SHORT TO GROUND
  • Measure the resistance between passenger seat harness connector C-339 pin 5, circuit (W/O), harness side and ground.
  • Is the resistance greater than 1,000,000 ohms? 
Yes REMOVE and INSPECT the seat harness for damage. If a concern is found, REPAIR the harness as needed. If no problem is found in the harness, Go to next step.
No REPAIR circuit (W/O). Go to step 22.
20 CONFIRM THE RCM FAULT
NOTE:
  • Make sure all restraint system diagnostic tools, sensor electrical connectors and the RCM electrical connector are connected before carrying out the on-demand self-test. If not, erroneous DTCs will be recorded.
  • Key in OFF position.
  • Depower the system. See DEPOWERING AND REPOWERING , .
  • Connect: Seat Harness connector C-328 (Driver) or C-339 (Passenger)
  • Connect RCM connectors 0810-101b and 0810-101 a
  • Repower the system. Do not prove out the system at this time. See DEPOWERING AND REPOWERING ,
  • Enter the following diagnostic mode on the IDS or equivalent tester: On-Demand Self-Test/Retrieve and Record Continuous Memory DTCs
  • Enter the following diagnostic mode on the IDS or equivalent tester: View and Record DTC B2292 Fault PIDs
  • Was on-demand DTC B2292 retrieved? 
Yes INSTALL a new RCM. See RESTRAINTS CONTROL MODULE (RCM) , . Go to step 22.
No CHECK for causes of the intermittent fault on the pretensioner circuits. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. Go to step 22.
21 CHECK FOR AN INTERMITTENT FAULT
  • Key in OFF position.
  • Enter the following diagnostic mode on the IDS or equivalent tester: On-Demand Self-Test/Retrieve and Record Continuous Memory DTCs
  • Enter the following diagnostic mode on the IDS or equivalent tester: View and Record DTC B2292 Fault PIDs
  • Was on-demand DTC B2292 retrieved? 
Yes This is a hard fault. The fault condition is now present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self-test.
CHECK for causes of the intermittent fault at or near the affected safety belt pretensioner electrical connector. REPAIR any intermittent concern found.
If an intermittent concern was found and repaired, Go to next step.
If an intermittent concern was not found and repaired, USE the fault PIDs recorded and GO to the appropriate pinpoint test step.
For driver safety belt buckle pretensioner with a low resistance fault, Go to step 2.
For driver safety belt buckle pretensioner with an open circuit fault, Go to step 2.
For driver safety belt buckle pretensioner with a short to battery fault, Go to step 6.
For driver safety belt buckle pretensioner with a short to ground fault, Go to step 8.
For passenger safety belt buckle pretensioner with a low resistance fault, Go to step 11.
For passenger safety belt buckle pretensioner with an open circuit fault, Go to step 11.
For passenger safety belt buckle pretensioner with a short to battery fault, Go to step 15.
For passenger safety belt buckle pretensioner with a short to ground fault, Go to step 17.
No CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. Go to next step.
22 CHECK FOR ADDITIONAL DTCs
  • Refer to the continuous memory DTCs recorded during Step 1.
  • Were any continuous memory DTCs retrieved during Step 1 ? 
Yes Do not clear any DTCs until all DTCs have been resolved. See DIAGNOSTIC TROUBLE CODE (DTC) INDEX - RESTRAINTS CONTROL MODULE (RCM) , for pinpoint test direction.
No RECONNECT the system. If previously directed to deactivate the system, REACTIVATE the system. See SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION , . REPOWER the system. See DEPOWERING AND REPOWERING , . PROVE OUT the system. CLEAR all RCM and OCS module DTCs.