DTC B0032, B0039, or B0045
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DTC B0032, B0039, or B0045
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Diagnostic trouble code definitions
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DTC B0032 01
Left rear belt pretensioner activation loop shorted to battery
DTC B0032 02
Left rear belt pretensioner activation loop shorted to ground
DTC B0032 04
Left rear belt pretensioner activation loop open
DTC B0032 0D
Left rear belt pretensioner activation loop high resistance
DTC B0032 0E
Left rear belt pretensioner activation loop low resistance
DTC B0039 01
Right rear belt pretensioner activation loop shorted to battery
DTC B0039 02
Right rear belt pretensioner activation loop shorted to ground
DTC B0039 04
Right rear belt pretensioner activation loop open
DTC B0039 0D
Right rear belt pretensioner activation loop high resistance
DTC B0039 0E
Right rear belt pretensioner activation loop low resistance
DTC B0045 01
Center rear belt pretensioner activation loop shorted to battery
DTC B0045 02
Center rear belt pretensioner activation loop shorted to ground
DTC B0045 04
Center rear belt pretensioner activation loop open
DTC B0045 0D
Centre rear belt pretensioner activation loop high resistance
DTC B0045 0E
Centre rear belt pretensioner activation loop low resistance
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Diagnostic Error Information
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Circuit
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Short to ground
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High Resistance
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Open
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Short to voltage
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Signal Performance
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Left rear pretensioner high check
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B0032 02, B0032 0E
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B0032 0D
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B0032 04, B0032 0D
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B0032 01
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-
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Left rear pretensioner low check
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B0032 02, B0032 0E
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B0032 0D
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B0032 04, B0032 0D
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B0032 01
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-
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Right rear pretensioner low check
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B0039 02, B0039 0E
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B0039 0D
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B0039 04
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B0039 01
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-
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Right rear pretensioner high check
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B0039 02, B0039 0E
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B0039 0D
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B0039 04
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B0039 01
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-
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Center rear pretensioner low check
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B0045 02, B0045 0E
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B0045 0D
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B0045 04
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B0045 01
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-
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Center rear pretensioner high check
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B0045 02, B0045 0E
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B0045 0D
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B0045 04
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B0045 01
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-
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Circuit/System Description
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During side or frontal impact with sufficient force the Inflatable restraint sensing and diagnostic module (SDM) will permit voltage through the activation loop to activate the airbag or pretensioner. There are two short pins that make the control circuit when the connector is taken apart. This prevents accidental activation of the airbag or pretensioner during service.
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Conditions for Running the DTC
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Ignition voltage is between 9-16 V.
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Conditions for Setting the DTC
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B0032 01, B0039 01, B0045 01
The pretensioner's control circuit is shorted to voltage for 2 seconds.
B0032 02, B0039 02, B0045 02
The pretensioner's control circuit is shorted to ground for 2 seconds.
B0032 04, B0039 04, B0045 04
The pretensioner's control circuit is open for 2 seconds.
B0032 0D, B0039 0D, B0045 0D
The pretensioner's activation loop's resistance is higher than 4.2 Ω in 2 seconds.
B0032 0E, B0039 0E, B0045 0E
The pretensioner's activation loop's resistance is lower than 1.4 Ω in 2 seconds.
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Activity when a diagnostic trouble code is generated
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Inflatable restraint sensing and diagnostic module (SDM) requests that the driver's instrument to illuminate the AIR BAG indicator.
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Inflatable restraint sensing and diagnostic module (SDM) stores diagnostic trouble codes, however, the system will be activated in a collision situation.
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Conditions for clearing DTCs
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A current DTC clears when the malfunction is no longer present.
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A history diagnostic trouble code is erased when 100 error-free ignition cycles have been performed.
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Note
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The following diagnostic aids apply for both current and history DTCs.
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An incorrectly installed connector position assurance (CPA) or incorrectly positioned connector can cause a short pin to short both the control circuits to each other. Check that the connectors and connector position assurance, if a diagnostic trouble code with suffix 02 or 0E has been set, to make sure that the short circuit pin has not caused the circuits to short. Short pins are used in the positions listed below:
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Driver and passenger seatbelt buckle and pretensioner
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Series wiring harness connector
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Harness side of the Inflatable restraint sensing and diagnostic module (SDM) connector
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Connector pin's fretting corrosion or improperly placed connector can cause an open circuit/high resistance. Check the circuit's connector pin for fretting corrosion or improperly placed connector if a diagnostic trouble code with the suffix 04 or 0D is set. Diagnostic trouble codes regarding the activation loop in seats may be due to harness fatigue or damage because of seat movement. Move the seat to each end position while checking the activation loop parameters with the diagnostic tool.
If pretensioners, dashboard air bags or seat side air bag is activated in unclear circumstances and/or a diagnostic trouble code with suffix 01 has been set; check both control circuits for short to voltage.
Schematic Reference
SIR Schematics
Components Connector End View, Reference
Component Connector End Views
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Diagnostic Tool Reference
Control module, references
for information about the diagnostic tool
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Circuit/System Verification
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Note
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Refer to
SIR Service Precautions
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Inspect all connector pins for damage or corrosion when the connectors are dismantled. Damage or corrosion requires repair or replacement of the affected components.
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Seatbelt pretensioner
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Dashboard air bag
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Knee airbag
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Side airbag
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Roof airbag
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SDM
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Seatbelt pretensioner wiring harness connector
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Dashboard air bag wiring harness connector
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Side wiring harness connector
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Roof wiring harness connector
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Inflatable restraint sensing and diagnostic module wiring harness connector
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Note
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Connector and connector position assurance (CPA) are connected independently. Both the connector and connector position assurance (CPA) are connected with an audible and/or noticeable click. The connector and connector position assurance (CPA) isolate the short-circuit pins in the connector to allow the activation circuit to work.
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If the fault is intermittent or cannot be repeated, disconnect the connectors and apply Nyogel lubricant 760G. This reduces the high resistance caused by fretting corrosion.
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1.
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Check with the diagnostic tool that the activation loops resistance values are stable between 2.1 and 4.0 Ω without spikes or dropouts when the wiring harness is moved/bend next to each of the following connectors:
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F109 seatbelt pretensioner
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2.
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If less than 2.1 or more than 4.0 Ω
Go to Circuit/System Testing.
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3.
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If spikes or dropouts occur, do the following:
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Check each connectors' pins and wiring harness for damage or fretting corrosion and repair if necessary.
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Apply Nyogel lubricant 760G to each connector pin.
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Ensure that each connector and connector position assurance (CPA) is positioned correctly.
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4.
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If within 2.1 and 4.0 Ω without spikes or dropouts
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1.
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Ignition switch set OFF. diagnostic tool disconnected. It can take up to 2 minutes for all vehicle systems to go to rest. Disconnect the applicable F109 belt buckle connector.
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2.
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Make sure it is more than 25 Ω between the control circuit pin 1 and 2.
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3.1.
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Disconnect X2 wiring harness connector at K36 Inflatable restraint sensing and diagnostic module (SDM).
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3.2.
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Test for infinite resistance between the two control circuits.
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3.3.
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If less than infinite resistance, repair the short between the two circuits.
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3.4.
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If infinite resistance, replace K36 Inflatable restraint sensing and diagnostic module (SDM).
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5.
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Ignition switch set to DRIVE.
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6.
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Test for less than 11 V between the control circuit pins listed below and ground:
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7.1.
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Ignition switch set to OFF. Disconnect X2 wiring harness connector at K36 Inflatable restraint sensing and diagnostic module (SDM). Ignition switch set to DRIVE
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7.2.
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Test for less than 1 V between the control circuit and ground.
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7.3.
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If 1 V or higher, repair the short to voltage on the circuit.
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7.4.
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If less than 1 V, replace K36 Inflatable restraint sensing and diagnostic module (SDM).
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9.
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Ignition switch set to OFF.
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10.
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Test for more than 25 Ω between the control circuit pins listed below and ground:
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11.1.
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Disconnect X2 wiring harness connector at K36 Inflatable restraint sensing and diagnostic module (SDM).
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11.2.
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Test for infinite resistance between the control circuit and ground.
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11.3.
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If less than infinite resistance, repair the circuit to ground on the circuit.
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11.4.
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If infinite resistance, replace K36 Inflatable restraint sensing and diagnostic module (SDM).
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13.
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Connect a 3 A fuse-protected short-circuit cable between the control circuit's terminal 1 and 2. Ignition switch set to DRIVE.
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14.
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Check that the diagnostic tool activation loop resistance is less than 2 Ω.
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15.1.
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Ignition switch set to OFF. Disconnect X2 wiring harness connector from K36 Inflatable restraint sensing and diagnostic module (SDM).
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15.2.
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Check that it is less than 2 Ω in each control circuit end to end.
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15.3.
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If 2 Ω or higher, repair the open circuit/high resistance in the circuit.
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15.4.
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If less than 2 Ω, replace K36 Inflatable restraint sensing and diagnostic module (SDM).
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17.
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Replace the applicable F109 seatbelt buckle pretensioner.
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Perform
Confirmation of diagnostic repair
after the repair.
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Control Module, References
for replacement of Inflatable restraint sensing and diagnostic module (SDM), programming and start up
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