Pinpoint Test A: The Air Bag Warning Indicator is Illuminated Continuously
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)
Pinpoint Test A: The Air Bag Warning Indicator is Illuminated Continuously
Refer to Wiring Diagrams Set 46, Supplemental Restraint System for schematic and connector information. Electrical Diagrams
Normal Operation
During normal operation, the Instrument Cluster (IC) module will illuminate the air bag indicator continuously for 6 seconds. If the Supplemental Restraint System (SRS) is fault free, the air bag warning indicator will turn off and remain off. If a fault is detected in the SRS (Supplemental Restraint System), the air bag warning indicator will illuminate and remain illuminated for the rest of the ignition cycle until the fault is no longer detected. The Restraints Control Module (RCM) communicates to the IC (Instrument Cluster) module via the Medium Speed Controller Area Network (MS-CAN). The IC (Instrument Cluster) module will illuminate the air bag warning indicator based on messaging from the RCM (Restraints Control Module) or if there is no communication between the RCM (Restraints Control Module) and IC (Instrument Cluster) module.
This pinpoint test is intended to diagnose the following:
- IC (Instrument Cluster) module
- RCM (Restraints Control Module)
PINPOINT TEST A : THE AIR BAG WARNING INDICATOR IS ILLUMINATED CONTINUOUSLY
WARNING: Always tighten the fasteners of the restraints control module (RCM) and impact sensor (if equipped) to the specified torque. Failure to do so may result in incorrect restraint system operation, which increases the risk of personal injury or death in a crash.
WARNING: Never probe the electrical connectors on air bag, Safety Canopy(R) or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Inspection and Verification
NOTE: SRS (Supplemental Restraint System) components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS (Supplemental Restraint System).
NOTE: The SRS (Supplemental Restraint System) must be fully operational and free of faults before releasing the vehicle to the customer.
A1 RETRIEVE RCM (Restraints Control Module) DTCs
NOTE: The RCM (Restraints Control Module) does not support the on-demand DTC function. All RCM (Restraints Control Module) diagnosis will be carried out using Continuous Memory Diagnostic Trouble Codes (CMDTCs) and associated status information. Refer to DTC Fault Reporting and Status Information. DTC Fault Reporting and Status Information
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
- Select the DTC and view DTC Status information.
Does the status information for any DTC indicate a fault was present at the time of request?
Yes
GO to the DTC Charts for diagnostic direction. Air Bag Systems / Seat Belt Systems
Do not clear any DTCs until all DTC concerns have been resolved.
No
REFER to Instrument Panel, Gauges and Warning Indicators to diagnose the IC (Instrument Cluster) module concern.
If the RCM (Restraints Control Module) does not communicate with the scan tool, REFER to Information Bus to diagnose no power to the scan tool.
Do not clear any DTCs until all DTC concerns have been resolved.