LEMON Manuals: Even more car manuals for everyone
Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Seat System - Seating) >> Diagnostic Tests >> Seats >> Pinpoint Tests >> Pinpoint Test K: The Heated Seat is Inoperative - Passenger Seat Does Not Heat But the Heated Seat Indicator Illuminates When Pressed >> Pinpoint Test K: The Heated Seat Is Inoperative - Passenger Seat Does Not Heat But The Heated Seat Indicator Illuminates When Pressed

Pinpoint Test K: The Heated Seat Is Inoperative - Passenger Seat Does Not Heat But The Heated Seat Indicator Illuminates When Pressed

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
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.
CAUTION: Do not install a new heater mat on a front passenger seat cushion. If a new cushion heater mat is needed on the front passenger seat, an occupant classification sensor (OCS) service kit equipped with a heater mat must be installed. Failure to follow this instruction may result in incorrect operation of the OCS system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM article for the OCS removal and installation procedure.
NOTE: The air bag warning indicator illuminates when the restraints control module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
  1. K1 CHECK CIRCUIT 2124 (YE/LB) FOR VOLTAGE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Passenger Seat Side Air Bag C337
    • Connect restraint system diagnostic tool 418-133 to passenger seat side air bag C337.
    • Disconnect: Passenger Heated Seat Connector C334
      • 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. Refer to BATTERY, MOUNTING AND CABLES .
    • Key in ON position.
      • Fig 1: Checking Circuit 2124 (YE/LB) For Voltage
      GF0000057Courtesy of FORD MOTOR CO.
    • Measure the voltage between passenger heated seat 334-1 circuit 2124 (YE/LB), harness side and ground.
    • Is the voltage greater than 10 volts when the heated seat switch is depressed and 0 volts when the switch is off? 
    1. YES  : Go to  K6.
    2. NO  : Go to  K2
  2. K2 CHECK THE HEATED SEAT RELAY 
    • Key in OFF position.
    • Swap the passenger heated seat relay with the driver heated seat relay.
    • Key in ON position.
    • Does the seat heat when the heated seat switch is depressed? 
    1. YES  : INSTALL a new heated seat relay. TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    2. NO  : Go to  K3.
  3. K3 CHECK THE HEATED SEAT POWER CIRCUITS 
    • Key in OFF position.
    • Disconnect: Heated Seat Relay (Passenger)
      • Fig 2: Measuring Voltage At Passenger Heated Seat Relay Socket Pin 1, Circuit 1048 (LB/WH) & Ground
      GF0000060Courtesy of FORD MOTOR CO.
    • Measure the voltage at passenger heated seat relay socket pin 1, circuit 1048 (LB/WH), and ground; and between pin 3, circuit 1048 (LB/WH), and ground.
    • Are both voltages greater than 10 volts? 
    1. YES  : Go to  K4.
    2. NO  : REPAIR circuit 1048 (LB/WH). TEST the system for normal operation.
  4. K4 CHECK CIRCUIT 2124 (YE/LB) FOR AN OPEN 
      Fig 3: Measuring Resistance Between Passenger Heated Seat Relay Socket Pin 5, Circuit 2124 (YE/LB)
      GF0000061Courtesy of FORD MOTOR CO.
    • Measure the resistance between passenger heated seat relay socket pin 5, circuit 2124 (YE/LB), and passenger cushion heater mat C334-1 circuit 2124 (YE/LB), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  K5.
    2. NO  : REPAIR the circuit TEST the system for normal operation.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  5. K5 CHECK THE HEATED SEAT REQUEST CIRCUIT 
    • Connect: Passenger Heated Seat Relay
    • Disconnect: HVAC module C294A
      • Fig 4: Measuring Voltage Between EMTC Module C294A-13, Circuit 2119 (DG/VT) & Ground
      GF0000062Courtesy of FORD MOTOR CO.
    • Measure the voltage between HVAC module C294A-13, circuit 2119 (DG/VT), harness side and ground.
    • Is the voltages greater than 10 volts? 
    1. YES  : INSTALL a new HVAC module. REFER to CLIMATE CONTROL .
    2. NO  : REPAIR circuit 2119 (DG/VT). TEST the system for normal operation.
  6. K6 CHECK CIRCUIT 1205 (BK) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Passenger Heated Seat Connector C335
      • Fig 5: Checking Circuit 1205 (BK) For An Open
      GF0014768Courtesy of FORD MOTOR CO.
    • Measure the resistance between passenger seat C335-2 circuit 1205 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  K7.
    2. NO  : REPAIR circuit 1205 (BK). TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  7. K7 CHECK THE CUSHION HEATER MAT FOR AN OPEN 
      Fig 6: Checking Cushion Heater Mat For An Open
      GF0014769Courtesy of FORD MOTOR CO.
    • Measure the resistance between passenger cushion heater mat C334-1 and C334-2 component side.
    • Is the resistance between 0.8 and 1.3 ohms? 
    1. YES  : Go to  K8.
    2. NO  : INSTALL a new passenger cushion heater mat. REFER to Seat Cushion Cover - Front . TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C337. CONNECT driver seat side air bag module C337. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  8. K8 CHECK THE BACKREST HEATER MAT FOR AN OPEN 
    • Disconnect: Passenger Backrest Heater Mat C335
      • Fig 7: Checking Backrest Heater Mat For An Open
      GF0014769Courtesy of FORD MOTOR CO.
    • Measure the resistance between passenger backrest heater mat C335-1 and C335-2 component side.
    • Is the resistance between 0.8 and 1.3 ohms? 
    1. YES  : REPAIR seat harness. TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    2. NO  : INSTALL a new backrest heater mat. REFER to Seat Cushion Cover - Front . TEST the system for normal operation.

      DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

scientia non olet · About LEMON Manuals