The inflatable restraint instrument panel (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.
This diagnostic procedure supports the following DTC:
DTC B0090 Active Switch Voltage Out of Range
Ignition 1 voltage is within the normal operating voltage range.
The voltage at I/P module disable switch signal and I/P module suppression indicator control is low or high with the I/P module disable switch indicator OFF for 500 milliseconds.
• | The I/P module disable switch is defaulted to a calibration state. |
• | The SDM commands ON the AIR BAG indicator via class 2 serial data. |
• | 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 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:
This step tests for an open or high resistance in the I/P module disable switch power feed circuit.
This step tests for an open or high resistance in the I/P module disable switch ground circuit.
This step tests for an open or high resistance in the I/P module disable switch signal circuit.
This step tests for a short in the I/P module disable switch signal circuit.
This step tests for a short in the I/P module suppression indicator control circuit.
This step tests for an open or high resistance in the I/P module suppression indicator control circuit.
Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
Schematic Reference: SIR Schematics Connector End View Reference: SIR Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the I/P module disable switch ON indicator illuminate in the I/P module disable switch? | -- | Go to Step 7 | Go to Step 3 |
3 |
Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 4 |
4 |
Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 5 |
Test the I/P module disable switch power feed circuit for an open or high resistance. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 6 | |
Test the I/P module disable switch ground circuit for an open or high resistance. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 7 | |
7 |
Does the I/P module disable switch (active switch) show the specified state? | Enabled | Go to Step 9 | Go to Step 8 |
Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 9 | |
Test the I/P module disable switch signal circuit for a short. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 10 | |
Test the I/P module suppression indicator control circuit for a short. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 11 | |
Test the I/P module suppression indicator control circuit for an open or high resistance. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 12 | |
12 | Replace the I/P module disable switch. Refer to Inflatable Restraint Instrument Panel Module Disable Switch Replacement . Did you complete the repair? | -- | Go to Step 13 | -- |
13 |
Does the DTC reset? | -- | Go to Step 2 | System OK |