The inflatable restraint I/P module disable switch circuit consists of an I/P module disable switch, I/P module disable switch indicator, I/P module disable switch signal circuit, and I/P module suppression indicator control circuit. When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. The SDM monitors the voltage levels at the I/P module disable switch signal and the I/P module suppression indicator control circuits of the SDM to determine the position of the I/P module disable switch. If a malfunction is detected, a DTC will be stored.
Ignition 1 voltage is within the normal operating voltage range.
The voltage at I/P module disable switch signal is low with the I/P module disable switch indicator ON and the voltage at I/P module suppression indicator control is high for 500 milliseconds.
• | The I/P module disable switch is defaulted to a calibrated state. |
• | The SDM commands ON the AIR BAG indicator via Class 2 serial data. |
• | The SDM toggles the I/P module disable switch AIR BAG indicator ON and OFF every 5 seconds. |
• | The condition responsible for setting the DTC no longer exists. |
• | You issue a scan tool CLEAR DTCs command. |
• | A history DTC will clear once 255 malfunction free ignition cycles have occurred. |
The following can cause an intermittent condition:
A short between the I/P module disable switch signal and the I/P module suppression indicator control circuits. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
The numbers below refer to the step numbers on the diagnostic table.
Observes the state of the I/P module disable switch, normal state being ON.
Tests for a malfunctioning I/P module disable switch.
Tests for a malfunctioning SDM.
Tests for a short in the I/P module disable switch signal circuit.
Tests for a short in the I/P module suppression indicator control circuit.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: SIR Schematics Connector End View Reference: SIR Connector End Views | |||
1 | Did you perform the Diagnostic System Check - SIR? | Go to Step 2 | |
2 |
Did you find and correct the condition? | Go to Step 11 | Go to Step 3 |
Does the scan tool indicate that the I/P module disable switch-active switch-is DISABLED? | Go to Step 4 | Go to Step 5 | |
Does the I/P module disable switch-active switch-data parameter change state? | Go to Diagnostic Aids | Go to Step 5 | |
Does the scan tool indicate that the I/P module disable switch-active switch-is DISABLED? | Go to Step 10 | Go to Step 6 | |
Test the I/P module disable switch signal circuit for a short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 | |
Test the I/P module suppression indicator control circuit for a short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 | |
8 |
Did you find and correct the condition? | Go to Step 11 | Go to Step 9 |
9 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Did you complete the replacement? | Go to Step 11 | -- |
10 | Replace the I/P module disable switch. Refer to Inflatable Restraint Instrument Panel Module Disable Switch Replacement . Did you complete the replacement? | Go to Step 11 | -- |
11 |
Does the DTC reset? | Go to Step 2 | System OK |