LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1114 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Test - Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Test B: DTC B1342 - ECU is Faulted (OCS) >> Pinpoint Test B: DTC B1342 - Ecu Is Faulted (OCS)

Pinpoint Test B: DTC B1342 - Ecu Is Faulted (OCS)

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
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 and cause serious personal injury or death.
WARNING: Never probe the electrical connectors on air bag, safety canopy 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.
WARNING: Never probe the electrical connectors on safety belt buckle/retractor pretensioners or adaptive load limiting retractors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors, which increases the risk of serious personal injury or death.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the Pinpoint Test.
  1. B1 CHECK FOR CONTINUOUS AND ON-DEMAND DTCs 
    • Enter the following diagnostic mode on the diagnostic tool: OCSM Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: OCSM DataLogger/View and Record All B1342 Fault PIDs
    • Do any OCSM on-demand B1342 fault PIDs indicate a fault? 
    1. YES  : This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. Go to  B2.
    2. NO  : This is an intermittent fault when present as a continuous memory DTC only (DTC not retrieved on demand). The fault condition is not present at this time. Go to  B8.
  2. B2 CHECK THE SEAT WIRING AND CONNECTORS 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Carry out a thorough visual inspection of the OCS system wiring, terminals and connectors and the related seat wiring harness and body wiring harness terminals and connectors.
    • Were any wire problems noted? 
    1. YES  : REPAIR the seat connectors and wiring as necessary. Refer to SYSTEM WIRING DIAGRAMS , Connector Repair Procedures for schematic and connector information. Go to  B9.
    2. NO  : Using the fault PIDs recorded in step B1, go to the appropriate pinpoint test step.

      For OCS power supply internal fault (1342_30_OD), go to  B3.

      For OCS micro-controller internal fault (1342_28_OD), OCS satellite ASIC fault (1342_29_OD) or OCS memory fault (1342_27_OD), INSTALL a new OCSM. REFER to Occupant Classification Module - Manual Seat Track  or Occupant Classification Module - Power Seat Track . Go to  B9.

  3. B3 CHECK THE OCS WEIGHT SENSOR BOLT CIRCUITS FOR A SHORT TO GROUND 
    • Disconnect: OCS Weight Sensor Bolt C3324, C3325, C3330 and C3331
    • Disconnect: OCSM C3159
      • Fig 1: Measuring Resistance Between OCS Weight Sensor Bolt 1 C3324-1 & Bolt 2 C3325-1, CR140 (YE/GN) & CR141 (BN/YE)
      GF0031161Courtesy of FORD MOTOR CO.
    • Measure the resistance between OCS weight sensor bolt 1 C3324-1, circuit CR140 (YE/GN), harness side and ground; between OCS weight sensor bolt 2 C3325-1, circuit CR141 (BN/YE), harness side and ground; between OCS weight sensor bolt 3 C3330-1, circuit CR153 (GN/WH), harness side and ground; and between OCS weight sensor bolt 4 C3331-1, circuit CR154 (VT/OG), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  B4.
    2. NO  : REPAIR circuit CR140 (YE/GN), circuit CR141 (BN/YE), circuit CR153 (GN/WH) or circuit CR154 (VT/OG). Go to  B9.
  4. B4 CHECK FOR SHORT BETWEEN THE OCS WEIGHT SENSOR BOLT CIRCUITS 
      Fig 2: Measuring Resistance Between OCS Weight Sensor Bolt 1 C3324-1 & Bolt 2 C3325-1, CR140 (YE/GN) & CR141 (BN/YE)
      GF0031162Courtesy of FORD MOTOR CO.
    • Measure the resistance between OCS weight sensor bolt 1 C3324-1, circuit CR140 (YE/GN), harness side and C3324-2, circuit RR140 (GN/OG), harness side; between OCS weight sensor bolt 2 C3325-1, circuit CR141 (BN/YE), harness side and C3325-2, circuit RR141 (VT/BN), harness side; between OCS weight sensor bolt 3 C3330-1, circuit CR153 (GN/WH), harness side and C3330-2, circuit RR153 (GY/BU), harness side; and between OCS weight sensor bolt 4 C3331-1, circuit CR154 (VT/OG), harness side and C3331-2, circuit RR154 (VT/WH), harness side.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  B5.
    2. NO  : REPAIR circuit CR140 (YE/GN), circuit RR140 (GN/OG), circuit CR141 (BN/YE), circuit RR141 (VT/BN), circuit CR153 (GN/WH), circuit RR153 (GY/BU), circuit CR154 (VT/OG), circuit RR154 (VT/WH). Go to  B9.
  5. B5 CHECK THE OCS WEIGHT SENSOR BOLT CIRCUITS FOR AN OPEN 
      Fig 3: Measuring Resistance Between OCS Weight Sensor Bolt 1 C3324-1 & Bolt 2 C3325-1, CR140 (YE/GN) & CR141 (BN/YE)
      GF0031163Courtesy of FORD MOTOR CO.
    • Measure the resistance between OCS weight sensor bolt 1 C3324-1, circuit CR140 (YE/GN), harness side and OCSM C3159-2, circuit CR140 (YE/GN), harness side; between OCS weight sensor bolt 2 C3325-1, circuit CR141 (BN/YE), harness side and OCSM C3159-10, circuit CR141 (BN/YE), harness side; between OCS weight sensor bolt 3 C3330-1, circuit CR153 (GN/WH), harness side and OCSM C3159-8, circuit CR153 (GN/WH), harness side; and between OCS weight sensor bolt 4 C3331-1, circuit CR154 (VT/OG), harness side and OCSM C3159-17, circuit CR154 (VT/OG), harness side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  B6.
    2. NO  : REPAIR circuit CR140 (YE/GN), circuit CR141 (BN/YE), circuit CR153 (GN/WH) or circuit CR154 (VT/OG). Go to  B9.
  6. B6 CHECK CIRCUIT CR140 (YE/GN), CIRCUIT CR141 (BN/YE), CIRCUIT CR153 (GN/WH) AND CIRCUIT CR154 (VT/OG) FOR A SHORT TO VOLTAGE 
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
      • Fig 4: Measuring Voltage Between OCS Weight Sensor Bolt 1 C3324-1 & Bolt 2 C3325-1, CR140 (YE/GN) & CR141 (BN/YE)
      GF0031164Courtesy of FORD MOTOR CO.
    • Measure the voltage between OCS weight sensor bolt 1 C3324-1, circuit CR140 (YE/GN), harness side and ground; between OCS weight sensor bolt 2 C3325-1, circuit CR141 (BN/YE), harness side and ground; between OCS weight sensor bolt 3 C3330-1, circuit CR153 (GN/WH), harness side and ground; and between OCS weight sensor bolt 4 C3331-1, circuit CR154 (VT/OG), harness side and ground.
    • Are the voltages less than 0.2 volt? 
    1. YES  : Go to  B7.
    2. NO  : REPAIR circuit CR140 (YE/GN), circuit CR141 (BN/YE), circuit CR153 (GN/WH) or circuit CR154 (VT/OG). Go to  B9.
  7. B7 CONFIRM THE OCS MODULE FAULT 
    NOTE: Make sure all restraint system sensor electrical connectors and the RCM electrical connector are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Connect: OCSM C3159
    • Connect: OCS Weight Sensor Bolt Electrical Connectors
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: OCSM Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: OCS DataLogger/View and Record All B1342 Fault PIDs
    • Do any OCSM on-demand B1342 fault PIDs indicate a fault? 
    1. YES  : INSTALL a new OCSM. REFER to Occupant Classification Module - Manual Seat Track  or Occupant Classification Module - Power Seat Track . Go to  B9.
    2. NO  : In the process of diagnosing the fault, the fault condition has become intermittent. CHECK for causes of the intermittent fault in the areas previously worked in, particularly the pins and terminals of any electrical connector that were disconnected.

      Go to  B8.

  8. B8 CHECK FOR AN INTERMITTENT FAULT 
    • Key in OFF position.
    • Carry out a thorough visual inspection of the OCS system wiring, terminals and connectors and the related seat wiring harness and body wiring harness terminals and connectors.
    • Enter the following diagnostic mode on the diagnostic tool: OCSM Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: OCS DataLogger/View and Record All B1342 Fault PIDs
    • Do any OCSM on-demand B1342 fault PIDs indicate a fault? 
    1. YES  : This is a hard fault. The fault condition is now present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. Go to  B2.
    2. NO  : CHECK for causes of intermittent open or short to ground on circuit CR140 (YE/GN), circuit CR141 (BN/YE), circuit CR153 (GN/WH) or circuit CR154 (VT/OG). ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. ACTIVATE other systems in the same wire harness. REPAIR any intermittent concerns found. Go to  B9.
  9. B9 CHECK FOR ADDITIONAL DTCs 
    • Refer to the continuous memory DTCs recorded during Step B1.
    • Were any continuous memory DTCs retrieved during Step B1? 
    1. YES  : Do not clear any DTCs until all DTCs have been resolved. Go to the Supplemental Restraint System (SRS) Diagnostic Trouble Code (DTC) Chart  for pinpoint test direction.
    2. NO  : RECONNECT the SRS. If previously directed to depower the SRS, REPOWER the SRS REFER to Supplemental Restraint System (SRS) Depowering and Repowering . PROVE OUT the SRS. CLEAR all RCM and OCSM DTCs.
scientia non olet · About LEMON Manuals