Pinpoint Test Z: DTCs B1317, B1318, U3003:16 and U3003:17
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)
Pinpoint Test Z: DTCs B1317, B1318, U3003:16 and U3003:17
Refer to Wiring Diagram Set 46, Supplemental Restraint System for schematic and connector information Electrical Diagrams.
NOTE: DTCs B1317, B1318, B1676, U3003:16 and U3003:17 can be set if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.
Normal Operation - Restraints Control Module (RCM)
The Restraints Control Module (RCM) continuously monitors the input voltage for correct operation. If the RCM (Restraints Control Module) detects input voltage below 9.5 volts, it stores DTC U3003:16 in memory. If the RCM (Restraints Control Module) detects input voltage above 20 volts, it stores DTC U3003:17 in memory. If the RCM (Restraints Control Module) sets DTC U3003:16 or U3003:17, it sends a message to the Instrument Panel Cluster (IPC) to illuminate the air bag warning indicator.
Normal Operation - Occupant Classification System Module (OCSM)
The Occupant Classification System Module (OCSM) continuously monitors the input voltage for correct operation. If the OCSM (Occupant Classification System Module) detects input voltage below 8 volts, it stores DTC B1318 in memory. If the OCSM (Occupant Classification System Module) detects input voltage above 17.2 volts, it stores DTC B1317 in memory. If the OCSM (Occupant Classification System Module) sets DTC B1317 or B1318, it sends a fault message to the RCM (Restraints Control Module). The RCM (Restraints Control Module) then sends a message to the IPC (Instrument Panel Cluster) module to illuminate the air bag warning indicator.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- RCM (Restraints Control Module)
- OCSM (Occupant Classification System Module)
PINPOINT TEST Z : DTCs B1317, B1318, U3003:16 and U3003:17
WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy(R) and cause serious personal injury or death.
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.
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.
NOTE: 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: Only disconnect or reconnect Supplemental Restraint System (SRS) components 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.
Z1 RETRIEVE ALL CMDTCs (Continuous Memory Diagnostic Trouble Codes) IN ALL MODULES
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- ALL CMDTC (Continuous Memory).
Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND P0562, P0563, P0620, P0625, P0626 or P065B retrieved from the PCM?
Yes
REFER to Charging System to diagnose the charging system.
No
GO to Z2.
Z2 TEST BATTERY CONDITION
- Ignition OFF.
- Carry out the battery condition test Pinpoint Tests.
Did battery pass the condition test?
Yes
If the battery passed the condition test but required a recharge, REFER to Charging System to diagnose the charging system. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). TEST the system for normal operation.
If the battery passed the condition test and did not require a recharge, GO to Z3.
No
INSTALL a new battery. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). TEST the SRS (Supplemental Restraint System) for normal operation.
Z3 CHECK CHARGING SYSTEM VOLTAGE
NOTE: Do not allow the engine speed to exceed 2,000 rpm while performing this step or the generator may self excite and result in default charging system output voltage. If engine speed exceeds 2,000 rpm, shut the vehicle OFF and restart the engine before performing this step.
- Measure the voltage of the battery:
- For DTC B1317 or U3003:17, turn off all accessories and run the engine at 1,500 rpm for a minimum of 2 minutes while measuring battery voltage.
- For DTC B1318 or U3003:16, turn on headlights and HVAC fan on high and run engine at 1,500 rpm for a minimum of 2 minutes while measuring battery voltage.
Is the voltage between 13 and 15.2 volts?
Yes
For DTC B1318 or U3003:16, GO to Z4.
For DTC B1317 or U3003:17, GO to Z6.
No
REFER to Charging System to diagnose the charging system. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). TEST the SRS (Supplemental Restraint System) for normal operation.
Z4 CHECK FOR OPEN IGNITION CIRCUIT TO THE MODULE
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect the module with the concern:
- For the RCM (Restraints Control Module), disconnect C310A and C310B.
- For the Occupant Classification System Module (OCSM), disconnect C3159.
- For the RCM (Restraints Control Module), measure the resistance between RCM (Restraints Control Module) C310A-13, circuit CBP20 (YE/VT), harness side and Central Junction Box (CJB) fuse 20.
- For the OCSM (Occupant Classification System Module), measure the resistance between OCSM (Occupant Classification System Module) C3159-1, circuit CBP04 (VT), harness side and CJB (Central Junction Box) fuse 4.
Is the resistance less than 1 ohm?
Yes
GO to Z5.
No
REPAIR the affected circuit.
Refer to Wiring Diagram Set 5, Connector Repair Procedures for schematic and connector information Electrical Diagrams. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). TEST the SRS (Supplemental Restraint System) for normal operation.
Z5 CHECK FOR OPEN GROUND TO THE MODULE
- For the RCM (Restraints Control Module) :
- Measure the resistance between the RCM (Restraints Control Module) case and a good ground.
- Measure the resistance between RCM (Restraints Control Module) C310A-14, circuit GD174 (BK/WH), harness side and ground.
- For the OCSM (Occupant Classification System Module), measure the resistance between OCSM (Occupant Classification System Module) C3159-14, circuit GD145 (BK/BU), harness side and ground.
Is the resistance less than 1 ohm?
Yes
GO to Z6.
No
For the RCM (Restraints Control Module), VERIFY there is no corrosion between the RCM (Restraints Control Module) case and mounting and VERIFY the fasteners are clean and tightened to specification with no corrosion or REPAIR circuit GD174 (BK/WH).
For the OCSM (Occupant Classification System Module), REPAIR circuit GD145 (BK/BU).
Refer to Wiring Diagram Set 5, Connector Repair Procedures for schematic and connector information Electrical Diagrams.
CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). TEST the SRS (Supplemental Restraint System) for normal operation.
Z6 CHECK FOR MODULE OPERATION
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect the module with the concern:
- For the RCM (Restraints Control Module), disconnect C310A and C310B.
- For the OCSM (Occupant Classification System Module), disconnect C3159.
- Check for the following:
- corrosion.
- damaged pins.
- pushed-out pins.
- Connect the RCM (Restraints Control Module) C310A and C310B or OCSM (Occupant Classification System Module) C3159 and make sure the connector seats correctly.
- Repower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new module. REFER to Restraints Control Module (RCM) Programmable Module Installation (PMI) or Occupant Classification Sensor. Service and Repair
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). TEST the SRS (Supplemental Restraint System) for normal operation.
Pinpoint Test - Occupant Classification System Module (OCSM)