Pinpoint Test W: DTC B1676
Seats
Pinpoint Tests
Pinpoint Test W: DTC B1676
Refer to Wiring Diagram Set 123, Memory Seats for schematic and connector information. Diagrams By Number
Normal Operation
The Driver Seat Module (DSM) is supplied voltage on circuit 490 (RD) and ground on circuit 57 (BK). The DSM monitors the supply voltage and will disable the system if voltage changes outside the normal operating range.
- DTC B1676 Battery Voltage Out of Range - If voltage to the DSM rises above 16.0 volts or falls below 11.5 volts, the DTC is set.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Low/high battery voltage
- Charging system
- DSM
PINPOINT TEST W: DTC B1676
WARNING: Remove restraint system diagnostic tools from the vehicle prior to road testing. If tools are not removed, the supplemental restraint system (SRS) device may not deploy in a crash. Failure to follow this instruction may result in serious personal injury or death in a crash and possibly violate vehicle safety standards.
NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition switch is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE: Verify good battery condition before diagnosing the memory seat system. Poor battery condition may interfere with memory seat operation, even if vehicle starting is possible.
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W1 CHECK FOR DSM DTC B2316
- Enter the following diagnostic mode on the scan tool: Self Test - DSM.
- Enter the following diagnostic mode on the scan tool: Clear all DSM continuous memory DTCs.
- Enter the following diagnostic mode on the scan tool: Self Test - DSM.
- Is DTC B2316 present?
Yes
REFER to the Master DTC Chart in Body Control Systems to diagnose the DSM concern. Diagnostic Trouble Code (DTC) Chart
No
GO to W2.
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W2 CHECK FOR VOLTAGE TO THE DSM
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C315.
- Connect: Restraint System Diagnostic Tool 418-133 to Driver Seat Side Air Bag C315.
- Disconnect: DSM C341b.
- WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
- Connect the battery ground cable.
- Ignition ON.
- Measure the voltage between DSM connector C341b-2, circuit 490 (RD), harness side and ground.
- Is the voltage between 11.5 and 16 volts?
Yes
CLEAR the DTCs. REPEAT the self-test. If DTC B1676 is retrieved again, INSTALL a new DSM and CARRY OUT Programmable Module Installation (PMI). REFER to Body Control Systems. Programming and Relearning
Otherwise, the system is operating correctly at this time.
DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag C315. CONNECT driver seat side air bag C315. REPOWER the SRS. REFER to Air Bag Systems.
No
REFER to Charging System to diagnose the charging system concern.
DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag C315. CONNECT driver seat side air bag C315. REPOWER the SRS. REFER to Air Bag Systems.
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