• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
IPM - Disable Switch Signal | B0090, B0091 | B0090 | B0090 | B0090, B0091 |
IPM - Suppression Indicator Control | B0090, B0091 | B0090 | B0090 | B0090, B0091 |
IPM - Ignition 1 Voltage | B0090 | B0090 | B0090 | -- |
IPM - Ground | -- | B0090 | B0090 | B0090 |
The inflatable restraint instrument panel module (IPM) disable switch circuit consists of an IPM disable switch, IPM disable switch indicator, IPM disable switch signal circuit, and IPM 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 IPM disable switch signal and the IPM suppression indicator control circuits of the SDM to determine the position of the IPM disable switch. If a malfunction is detected, a DTC will be stored in memory.
Ignition voltage is between 9-16 volts.
The voltage at IPM disable switch signal is low with the IPM disable switch indicator ON and the voltage at IPM suppression indicator control is high for 500 milliseconds.
• | The IPM disable switch is defaulted to a calibrated state. |
• | The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator. |
• | The SDM toggles the IPM disable switch AIR BAG indicator ON and OFF every 5 seconds. |
• | The condition responsible for setting the DTC no longer exists. |
• | A history DTC will clear once 255 malfunction-free ignition cycles have occurred. |
The following can cause an intermittent condition:
A short between the IPM disable switch signal and the IPM suppression indicator control circuits. Refer to Testing for Intermittent Conditions and Poor Connections .
SIR System Description and Operation
Control Module References for scan tool information
⇒ | If greater than the specified range, test the switch signal circuit for a short to voltage. |
⇒ | If greater than the specified range, test the switch signal circuit for a short to voltage. |
⇒ | If less than the specified value, test the switch signal circuit for a short to ground. |
⇒ | If less than the specified value, test the indicator control circuit for a short to ground. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for SDM replacement, setup, and programming |