B0059

DTC B0059 RF/Passenger Pretensioner Deployment Loop Short to Ground/Voltage Out of Range

Schematic:

CIRCUIT DESCRIPTION
When you first turn ON the ignition, the inflatable restraint Sensing and Diagnostic Module (SDM) performs tests to diagnose critical malfunctions within itself. Then the SDM performs the following continuous diagnostic tests on the deployment loops:
^ Deployment loop voltage out of range test
^ Deployment loop resistance measurement test

If the voltage out of range test detects a short to voltage condition, the resistance measurement test for that deployment loop will not be performed.

CONDITIONS FOR RUNNING THE DTC
Deployment loop voltage out of range - Ignition 1 voltage is within the normal operating voltage range.

Deployment loop resistance measurement test:
^ Ignition 1 voltage is within the normal operating voltage range.
^ Passenger seat belt pretensioner deployment loop is not shorted to voltage.

CONDITIONS FOR SETTING THE DTC
Deployment loop voltage out of range test - Passenger belt high terminal C4 is more than 6 Volts for 300 milliseconds.
Deployment loop resistance measurement test - Passenger belt high terminal C4 is less than 2 Volts AND passenger seat belt pretensioner deployment loop resistance is less than 6 Ohms for 300 milliseconds.

ACTION TAKEN WHEN THE DTC SETS
The SDM commands ON the AIR BAG warning lamp via Class 2 serial data.

CONDITIONS FOR CLEARING THE DTC
^ You can issue a CLEAR CODES command
^ A history DTC will clear once 255 malfunction free ignition cycles have occurred

DIAGNOSTIC AIDS
A short to B+ or a short to ground in the passenger seat belt pretensioner deployment loop can cause an intermittent condition. Inspect the passenger belt high and passenger belt low circuits carefully for cutting and chafing. Wiring pigtail damage requires replacement of the passenger seat belt pretensioner.

TEST DESCRIPTION

Steps 1 - 6:

Steps 7 - 16:

The number(s) below refer to the step number(s) on the diagnostic table.
2. This step checks the passenger seat belt pretensioner yellow 2-way connector.
5. This step checks to see if there is a malfunctioning passenger seat belt pretensioner.
7. This step checks to see if there is a short to ground in the passenger belt high circuit.
9. This step checks to see if there is a short to ground in the passenger belt low circuit.
11. This step checks to see if there is a short to B+ in the passenger belt high circuit.
13. This step determines if there is a short to B+ in the passenger belt low circuit or if there is a malfunctioning SDM.
16. This step clears all SIR and all communication DTCs.