Seat System: Overview Mercury Sable V

Normal Operation

The driver seat control switch is powered by battery voltage to the driver seat control switch, circuit SBB32 (VT/RD), and is supplied ground on driver circuit GD147 (BK/VT). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor or power recliner motor to move the seat or backrest. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor or power recliner motor, which moves the seat or backrest in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). There is an additional motor in the power recliner mechanism to move the seat backrest forward and rearward. If a new motor needs to be installed, it is necessary to install an entire power seat track or power recliner mechanism.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Seat control switch

The driver seat control switch is powered by battery voltage to the driver seat control switch, circuit SBB32 (VT/RD), and is supplied ground on driver circuit GD147 (BK/VT). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new motor needs to be installed, it is necessary to install an entire power seat track.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Seat control switch

The passenger seat control switch is powered by battery voltage to the passenger seat control switch, circuit SBB21 (GY/RD), and is supplied ground on passenger circuit GD148 (GK/YE). When pressed, the seat control switch supplies that voltage and ground to the power seat track motor or power recliner motor to move the seat or backrest. When pressed in the opposite direction, the seat control switch reverses the polarity to the power seat track motor or power recliner motor, which moves the seat or backrest in the opposite direction. There is one power seat track motor which moves the seat cushion horizontally (forward/rearward) and an additional motor in the power recliner mechanism to move the seat backrest forward and rearward. If a new motor needs to be installed, it is necessary to install an entire power seat track or power recliner mechanism.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Seat control switch

The passenger seat control switch is powered by battery voltage to the passenger seat control switch, circuit SBB21 (GY/RD), and is supplied ground on passenger circuit GD148 (GK/YE). When pressed, the seat control switch supplies that voltage and ground to the power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to the power seat track motor, which moves the seat in the opposite direction. There is one power seat track motor which moves the seat horizontally (forward/rearward). If a new motor needs to be installed, it is necessary to install an entire power seat track.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Seat control switch
4. Power seat motor (seat track)

The driver seat control switch is powered by battery voltage on driver circuit SBB32 (VT/RD) and is supplied ground on circuit GD147 (BK/VT). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor or power recliner motor to move the seat or backrest. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor or power recliner motor, which moves the seat or backrest in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). There is an additional motor in the power recliner mechanism to move the seat backrest forward and rearward. If a new motor needs to be installed, it is necessary to install an entire power seat track or power recliner mechanism.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Seat control switch
3. Power seat motor (seat track)
4. Power recliner mechanism

The driver seat control switch is powered by battery voltage on driver circuit SBB32 (VT/RD) and is supplied ground on circuit GD147 (BK/VT). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new motor needs to be installed, it is necessary to install an entire power seat track.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Seat control switch
3. Power seat motor (seat track)

The passenger seat control switch is powered by battery voltage on circuit SBB21 (GY/RD) and is supplied ground on circuit GD148 (BK/YE). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There is a power seat track motor that moves the seat horizontally (forward/reverse) and a motor in the power recliner mechanism that moves the seat backrest forward or rearward.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Seat control switch
3. Power seat motor (seat track)

The power seat should move quietly during operation. Some noise is acceptable.

This pinpoint test is intended to diagnose the following

1. Seat track alignment
2. Seat track obstruction
3. Seat track

The power seat movement should be smooth and the seat cushion should not rock during or after operation.

This pinpoint test is intended to diagnose the following

1. Seat track fastening hardware
2. Seat track

The driver power seat should travel fully horizontal (forward/rearward) and vertical (front up/down and rear up/down). The passenger power seat should travel fully horizontal (forward/rearward).

This pinpoint test is intended to diagnose the following

1. Seat track obstruction
2. Seat track

The driver seat control switch is powered by battery voltage on circuit SBP12 (GN/RD) and is supplied ground on circuit GD147 (BK/VT). When pressed, the seat control switch supplies the voltage and ground to the applicable driver seat module (DSM) inputs. The DSM then supplies voltage and ground to the appropriate power seat track motor or power recline motor based on the inputs received from the seat control switch. When pressed in the opposite direction, the seat control switch reverses the polarity to the DSM inputs, and the DSM likewise reverses polarity of the appropriate power seat track motor or power recliner motor circuits causing the seat or backrest to move in the opposite direction. There are 3 power seat track motors that combine to move the seat horizontally (forward/rearward) and vertically (front up/down and rear up/down). The seat backrest power recliner mechanism uses a single motor to move the seat backrest forward and rearward.

Battery voltage is also supplied to DSM on circuit SBB32 (VT/RD) and SBP12 (GN/RD). Ground is supplied to the DSM on circuit GD147 (BK/VT).

Each motor, in the memory power seat track and power recliner mechanism contains a Hall-effect position sensor. The DSM supplies a shared signal feed circuit to each position sensor. Each position sensor sends a signal pulse back to the DSM used to monitor the position of the power seat and seat backrest. The DSM uses this information to return the seat to a stored pre-programmed position when pressing the memory SET switch or a remote entry transmitter. For information on programming memory positions or recalling a stored memory position, refer to Memory Position Programming .

The following pinpoint test diagnoses a memory seat that does not operate in one or more directions when using the seat control switch. If the seat does move in all directions using the seat control switch or operates in 1-second intervals, Go to Pinpoint Test L .

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Seat control switch
4. Missing status information (controller area network [CAN] communication bus messages): Ignition switch status Gear selector position
5. Seat track
6. Power recliner mechanism
7. DSM

The driver seat control switch is powered by battery voltage on circuit SBP12 (GN/RD) and is supplied ground on circuit GD147 (BK/VT). When pressed, the seat control switch supplies the voltage and ground to the applicable driver seat module (DSM) inputs. The DSM then supplies voltage and ground to the appropriate power seat track motor or power recline motor based on the inputs received from the seat control switch. When pressed in the opposite direction, the seat control switch reverses the polarity to the DSM inputs, and the DSM likewise reverses polarity of the appropriate power seat track motor or power recliner motor circuits causing the seat or backrest to move in the opposite direction. There are 3 power seat track motors that combine to move the seat horizontally (forward/rearward) and vertically (front up/down and rear up/down). The seat backrest power recliner mechanism uses a single motor to move the seat backrest forward and rearward.

Battery voltage is also supplied to DSM on circuit SBB32 (VT/RD) and SBP12 (GN/RD). Ground is supplied to the DSM on circuit GD147 (BK/VT).

Each motor, in the memory power seat track and power recliner mechanism contains a Hall-effect position sensor. The DSM supplies a shared signal feed circuit to each position sensor. Each position sensor sends a signal pulse back to the DSM used to monitor the position of the power seat and seat backrest. The DSM uses this information to return the seat to a stored pre-programmed position when pressing the memory SET switch or a remote entry transmitter. For information on programming memory position or recalling a stored memory position, refer to Memory Position Programming .

The following pinpoint test diagnoses a memory seat that does not operate correctly using the memory SET switch or operates in 1-second intervals. If the memory seat does not move in all directions using the seat control switch, Go to Pinpoint Test K .

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Remote keyless entry (RKE) transmitter
4. Memory SET switch
5. Missing status information (controller area network [CAN] communication bus messages): Ignition switch status Gear selector position
6. Seat track
7. Power recliner mechanism
8. DSM

The heated seat module receives ignition voltage feed on circuit CBP35 (YE/GY), battery voltage feed on circuit SBB22 (BN/RD) and is supplied ground on circuit GD148 (BK/YE). When ignition switched power is supplied and the driver heated seat button on the HVAC module is pressed, a momentary ground signal is sent to the heated seat module to command the system on or off. Upon receiving a signal, the heated seat module will decrease one setting (the sequence is high, low, off, high, etc.). The heated seat module is designed to remain on, heating the seat and maintaining temperature until switched off or a 10-minute time-out period occurs.

This pinpoint test is intended to diagnose the following

1. Fuse(s)
2. Wiring, terminals or connectors
3. Backrest or cushion heater mat
4. Heated seat module
5. HVAC module

The heated seat module receives ignition voltage on circuit CBP35 (YE/GY), battery voltage on circuit SBB22 (BN/RD) and is supplied ground on circuit GD148 (BK/YE). With the ignition ON and the driver heated seat button pressed, a momentary ground signal is sent from the HVAC module to the heated seat module on circuit CHS29 (WH/BU) to request the system on or off. The heated seat will decrease one setting with each button press (the sequence is high, low, off, high, etc.). The heated seat module supplies voltage to the cushion and backrest heater mats on heater circuit CHS02 (YE/BU). Ground to the heater mats is provided on circuit GD147 (BK/VT). The cushion and backrest heater mats are connected in series and operate together. The heated seat module regulates seat temperature by monitoring resistance of a thermistor type thermostat (part of the cushion heater mat) connected on circuits VHS26 (VT) and RHS05 (YE/VT). The heated seat module is designed to remain on, heating the seat and maintaining temperature until switched off.

The heated seat module monitors the heater output and thermistor circuits for fault detection but does not report DTCs and is not connected to the communication bus circuits. If an open circuit or short to ground occurs, the output is disabled to the heater mats and the heated seat indicators turn off. When a fault is detected, the heated seat module only disables the affected seat. While disabled, the heated seat indicators will flash once with each button press and the heated seat cannot be operated until the system is repaired. The ignition must be cycled OFF to reset the heated seat module from the detected fault.

This pinpoint test is intended to diagnose the following

1. Fuse(s)
2. Wiring, terminals or connectors
3. Backrest or cushion heater mat
4. Heated seat module
5. HVAC module

The heated seat module receives ignition voltage on circuit CBP35 (YE/GY), battery voltage on circuit SBB22 (BN/RD) and is supplied ground on circuit GD148 (BK/YE). With the ignition ON and the passenger heated seat button is pressed, a momentary ground signal is sent from the HVAC module to the heated seat module on circuit CHS30 (GY/YE) to request the system on or off. The heated seat will decrease one setting with each button press (the sequence is high, low, off, high, etc.). The heated seat module supplies voltage to the cushion and backrest heater mats on heater circuit CHS07 (GY/BU). Ground to the heater mats is provided on circuit GD148 (BK/YE). The cushion and backrest heater mats are connected in series and operate together. The heated seat module regulates seat temperature by monitoring resistance of a thermistor type thermostat (part of the cushion heater mat) connected on circuits VHS27 (WH/OG) and RHS05 (YE/VT). The heated seat module is designed to remain on, heating the seat and maintaining temperature until switched off.

The heated seat module monitors the heater output and thermistor circuits for fault detection but does not report DTCs and is not connected to the communication bus circuits. If an open circuit or short to ground occurs, the output is disabled to the heater mats and the heated seat indicators turn off. When a fault is detected, the heated seat module only disables the affected seat. While disabled, the heated seat indicators will flash once with each button press and the heated seat cannot be operated until the system is repaired. The ignition must be cycled OFF to reset the heated seat module from the detected fault.

This pinpoint test is intended to diagnose the following

1. Fuse(s)
2. Wiring, terminals or connectors
3. Backrest or cushion heater mat
4. Heated seat module
5. HVAC module

Upon receiving a signal from the HVAC module, the heated seat module will decrease one setting (the sequence is high, low, off, high, etc.). Circuits CHS04 (YE/GY) and CHS13 (VT/BN) between the heated seat module and HVAC module supply the control signals for the indicators to operate. When a heated seat is set to high, both LED indicators above the heated seat control button will illuminate. When a heated seat is set to low, only the left LED indicator will illuminate. When a heated seat is set to off, neither LED will be illuminated.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Heated seat module
3. HVAC module

Upon receiving a signal from the HVAC module, the heated seat module will decrease one setting (the sequence is high, low, off, high, etc.). Circuits CHS09 (GY) and CHS14 (GN) between the heated seat module and HVAC module supply the control signals for the indicators to operate. When a heated seat is set to high, both LED indicators above the heated seat control button will illuminate. When a heated seat is set to low, only the left LED indicator will illuminate. When a heated seat is set to off, neither LED will be illuminated.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Heated seat module
3. HVAC module

Each second row power-fold seat receives battery voltage from the smart junction box (SJB) circuit SBP18 (YE/RD) (hot at all times) and is connected to ground. The power-fold seat motors contain internal switching that operate the motor until it moves to the reset position and turns off. The demand lighting/battery saver voltage output circuit CLN09 (YE/GN) from the SJB provides the control signal voltage to each seat control switch. The seat control switches are momentary contact switches when pressed and held for at least one second supply switched voltage to the power-fold seat motor control circuit CPS56 (GN/BN) or CPS57 (GY/BN) to initiate a pull and release cycle. The power-fold seat motor retracts a release cable connected to the same mechanical release lever in the seat latch mechanism as the manual release pull strap. When the power-fold seat motor is cycled, the pull strap retraction and release/reset will be noticeable.

This pinpoint test is intended to diagnose the following

1. Fuse(s)
2. Wiring, terminals or connectors
3. Power-fold switch
4. Power-fold seat actuator

Each second row power-fold seat receives battery voltage from the smart junction box (SJB) circuit SBP18 (YE/RD) (hot at all times) and is connected to ground. The power-fold seat motors contain internal switching that operate the motor until it moves to the reset position and turns off. The demand lighting/battery saver voltage output circuit from the SJB provides the control signal voltage to each seat control switch. The seat control switches are momentary contact switches when pressed and held for at least one second supply switched voltage to the power-fold seat motor control circuit to initiate a pull and release cycle. The power-fold seat motor retracts a release cable connected to the same mechanical release lever in the seat latch mechanism as the manual release pull strap. When the power-fold seat motor is cycled, the pull strap retraction and release/reset will be noticeable.

This pinpoint test is intended to diagnose the following

1. Fuse(s)
2. Wiring, terminals or connectors
3. Latch(es)
4. Release cable(s)
5. Latch release pull strap
6. Power-fold seat actuator
7. SJB

The heated seat module receives battery voltage on circuit SBB05 (GY/RD) and ignition voltage on circuit CBP35 (YE/GY), and is supplied ground on circuit GD133 (BK). When the left rear heated seat control switch is pressed with the ignition switch in RUN or START, a ground is supplied on circuit CHS46 (YE/GN) to command the system on or off in high heat mode or circuit CHS47 (VT/GN) to command the system on or off in low heat mode. When the right rear heated seat control switch is pressed with the ignition switch in RUN or START, a ground is supplied on circuit CHS50 (BU/GY) to command the system on or off in high heat mode or circuit CHS51 (YE/GY) to command the system on or off in low heat mode. When commanded on, voltage is supplied to the heated seat switch from the heated seat module on either circuit CHS48 (YE) (left rear) or CHS52 (BU) (right rear) (high heat mode); or circuit CHS49 (VT) (left rear) or CHS53 (WH/BN) (right rear) (low heat mode) illuminating the switch indicator. The heated seat module also supplies voltage to the cushion and backrest heater mats on circuit CHS39 (GN/BU) (left rear) or CHS43 (GY/BU) (right rear) and ground to the heater mats on circuit GD147 (BK/VT) (left rear) or GD148 (BK/YE) (right rear). The cushion and backrest heater mats are connected in series and operate together. Temperature is maintained by the heated seat module using a sensor contained within the cushion heater mat. The heated seat module monitors the temperature sensors on circuit VHS42 (GN) (left rear) or VHS45 (GY/BN) (right rear) for adjusting the current flow to the heater mats and uses a ground supplied on circuit RHS41 (GN/BN). The heated seat module is designed to remain on, heating the seat and maintaining temperature until switched off or the ignition power is switched OFF.

This pinpoint test is intended to diagnose the following

1. Fuse(s)
2. Wiring, terminals or connectors
3. Heated seat module

Scheme 1

Scheme 2

Scheme 3

1. T1 CHECK THE VOLTAGE TO THE HEATED SEAT MODULE Disconnect: Heated Seat Module C3162 Key in ON position. Measure the voltage between heated seat module C3162-2, circuit CBP35 (YE/GY), harness side and ground; and between heated seat module C3162-1, circuit SBB05 (GY/RD), harness side and ground. Are the voltages greater than 10 volts? YES : Go to T2 . NO : VERIFY battery junction box (BJB) fuse 5 (20A) and SJB fuse 35 (10A) are OK. If OK, REPAIR the affected circuit. TEST the system for normal operation.
2. T2 CHECK THE HEATED SEAT MODULE GROUND Key in OFF position. Measure the resistance between heated seat module C3162-7, circuit GD133 (BK), harness side and ground. Is the resistance less than 5 ohms? YES : Go to T3 . NO : REPAIR the circuit. TEST the system for normal operation.
3. T3 CHECK THE SENSOR RETURN CIRCUIT FOR SHORT TO VOLTAGE Key in ON position. Measure the voltage between heated seat module C3162-13, circuit RHS41 (GN/BN), harness side and ground. Is voltage greater than 0.2 volt? YES : REPAIR the circuit. TEST the system for normal operation. NO : Go to T4 .
4. T4 CHECK THE SENSOR RETURN CIRCUIT FOR SHORT TO GROUND Key in OFF position. Measure the resistance between heated seat module C3162-13, circuit RHS41 (GN/BN), harness side and ground. Is the resistance greater than 10,000 ohms? YES : Go to T5 . NO : REPAIR the circuit. TEST the system for normal operation.
5. T5 CHECK THE SENSOR RETURN CIRCUIT FOR AN OPEN Disconnect: Right Rear Heated Seat C3169 Measure the resistance between heated seat module C3162-13, circuit RHS41 (GN/BN), harness side and right rear heated seat C3169-3, circuit RHS41 (GN/BN), harness side. Is the resistance less than 5 ohms? YES : INSTALL a new heated seat module. REFER to «Heated Seat Module - Rear»(ref-293480-S37238763322008080700000) . TEST the system for normal operation. NO : REPAIR the circuit. TEST the system for normal operation.

The heated seat module receives battery voltage on circuit CBP35 (YE/GY) and ignition voltage on circuit SBB05 (GY/RD), and is supplied ground on circuit GD133 (BK). When the left rear heated seat control switch is pressed with the ignition switch in RUN or START, a ground is supplied on circuit CHS46 (YE/GN) to command the system on or off in high heat mode or circuit CHS47 (VT/GN) to command the system on or off in low heat mode. When commanded on, voltage is supplied to the heated seat switch from the heated seat module on either circuit CHS48 (YE) (high heat mode) or circuit CHS49 (VT) (low heat mode) illuminating the switch indicator. The heated seat module also supplies voltage to the cushion and backrest heater mats on circuit CHS39 (GN/BU) and ground to the heater mats on circuit GD147 (BK/VT). The cushion and backrest heater mats are connected in series and operate together. Temperature is maintained by the heated seat module using a sensor contained within the cushion heater mat. The heated seat module monitors the temperature sensor on circuit VHS42 (GN) for adjusting the current flow to the heater mats and uses a ground supplied on circuit RHS41 (GN/BN). The heated seat module is designed to remain on, heating the seat and maintaining temperature until switched off or the ignition power is switched OFF.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Heated seat switch
3. Heater mat
4. Heated seat module

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Scheme 14

Scheme 15

Scheme 16

Scheme 17

Scheme 18

Scheme 19

1. U1 CHECK CIRCUIT SBB05 (GY/RD) FOR VOLTAGE TO THE HEATED SEAT MODULE Disconnect: Heated Seat Module C3162 Measure the voltage between heated seat module C3162-1, circuit SBB05 (GY/RD) harness side and ground. Is the voltage greater than 10 volts? YES : Go to U2 . NO : VERIFY battery junction box (BJB) fuse 5 (20A) is OK. If the fuse is OK, REPAIR the circuit. TEST the system for normal operation.
2. U2 CHECK CIRCUIT CHS39 (GN/BU) FOR AN OPEN OR SHORT TO GROUND Disconnect: Left Rear Cushion Heater Mat C3167 Measure the resistance between left rear seat cushion heater mat C3167-1, circuit CHS39 (GN/BU), harness side and ground; and between C3167-1, circuit CHS39 (GN/BU), harness side and heated seat module C3162-9, circuit CHS39 (GN/BU), harness side. Is the resistance greater than 10,000 ohms between the left rear seat cushion heater mat and ground; and less than 5 ohms between the left rear seat cushion heater mat and the heated seat module? YES : Go to U3 . NO : REPAIR the circuit. TEST the system for normal operation.
3. U3 CHECK CIRCUIT VHS42 (GN) FOR AN OPEN OR SHORT TO GROUND Measure the resistance between left rear seat cushion heater mat C3167-2, circuit VHS42 (GN), harness side and ground; and between C3167-2, circuit VHS42 (GN), harness side and heated seat module C3162-10, circuit VHS42 (GN) harness side. Is the resistance greater than 10,000 ohms between the left rear seat cushion heater mat and ground and less than 5 ohms between the left rear seat cushion heater mat and the heated seat module? YES : Go to U4 . NO : REPAIR the circuit. TEST the system for normal operation.
4. U4 CHECK CIRCUIT RHS41 (GN/BN) FOR AN OPEN OR SHORT TO GROUND Measure the resistance between left rear seat cushion heater mat C3167-3, circuit RHS41 (GN/BN), harness side and ground; and between C3167-3, circuit RHS41 (GN/BN), harness side and heated seat module C3162-13, circuit RHS41 (GN/BN) harness side. Is the resistance greater than 10,000 ohms between the left rear seat cushion heater mat and ground and less than 5 ohms between the left rear seat cushion heater mat and the heated seat module? YES : Go to U5 . NO : REPAIR the circuit. TEST the system for normal operation.
5. U5 CHECK CIRCUITS CHS39 (GN/BU), VHS42 (GN) AND RHS41 (GN/BN) FOR SHORT TO VOLTAGE Key in ON position. Measure the voltage between the following left rear seat cushion heater mat C3167 pins, harness side and ground: Connector - Pin Circuit C3167-1 CHS39 (GN/BU) C3167-2 VHS42 (GN) C3167-3 RHS41 (GN/BN) Are the voltages less than 0.2 volt? YES : Go to U6 . NO : REPAIR the affected circuit. TEST the system for normal operation.
6. U6 CHECK THE BACKREST HEATER MAT GROUND CIRCUIT GD147 (BK/VT) FOR AN OPEN Key in OFF position. Disconnect: Left Rear Seat Backrest Heater Mat C3168 Measure the resistance between left rear seat backrest heater mat C3168-1, circuit GD147 (BK/VT), harness side and ground. Is the resistance less than 5 ohms? YES : Go to U7 . NO : REPAIR the circuit. TEST the system for normal operation.
7. U7 CHECK CUSHION HEATER MAT AND SENSOR FOR SHORT TO VOLTAGE Key in ON position. Measure the voltage between left rear seat cushion heater mat C3167 pin 1, component side and ground; and between left rear seat cushion heater mat C3167 pin 2, component side and ground. Are the voltages less than 0.2 volt? YES : Go to U8 . NO : INSTALL a new cushion heater mat. TEST the system for normal operation.
8. U8 CHECK THE CUSHION HEATER MAT FOR AN OPEN OR SHORT TO GROUND Key in OFF position. Measure the resistance between left rear seat cushion heater mat C3167 pin 1, component side and ground; and between left rear seat cushion heater mat C3167 pin 1 and pin 4, component side. Is the resistance greater than 10,000 ohms between the left rear seat cushion heater mat and ground; and between 1.6 and 2.2 ohms between the left rear seat cushion heater mat pins 1 and 4? YES : Go to U9 . NO : INSTALL a new cushion heater mat. TEST the system for normal operation.
9. U9 CHECK THE BACKREST HEATER MAT FOR AN OPEN OR SHORT TO GROUND Measure the resistance between left rear seat backrest heater mat connector pin 2, component side and ground; and between left rear seat backrest heater mat connector pin 2 and pin 1, component side. Is the resistance greater than 10,000 ohms between the left rear seat backrest heater mat and ground; and between 1.6 and 2.2 ohms between the left rear seat backrest heater mat pins? YES : Go to U10 . NO : INSTALL a new backrest heater mat. TEST the system for normal operation.
10. U10 CHECK CIRCUIT BETWEEN BACKREST AND CUSHION HEATER MAT FOR AN OPEN AND SHORT TO GROUND Measure the resistance between left rear seat cushion heater mat C3167-4, circuit CHS40 (GY/VT), harness side and left rear seat backrest heater mat C3168-2, circuit CHS40 (GY/VT), harness side; and between left rear seat cushion heater mat C3167-4, circuit CHS40 (GY/VT), harness side and ground. Is the resistance less than 5 ohms? YES : Go to U11 . NO : REPAIR the circuit. TEST the system for normal operation.
11. U11 CHECK THE CUSHION HEATER MAT TEMPERATURE SENSOR FOR AN OPEN OR SHORT TO GROUND Measure the resistance between left rear seat cushion heater mat C3167 pin 2 and pin 3, component side; and between left rear seat cushion heater mat C3167 pin 2, component side and ground. Is the resistance less than 300,000 ohms and greater than 50 ohms between left rear seat cushion heater mat pins; and greater than 10,000 ohms between left rear seat cushion heater mat and ground? YES : Go to U12 . NO : INSTALL a new cushion heater mat. TEST the system for normal operation.
12. U12 CHECK CIRCUITS CHS46 (YE/GN) AND CHS47 (VT/GN) FOR A SHORT TO VOLTAGE Disconnect: Left Rear Heated Seat Switch C3340 Key in ON position. Measure the voltage between heated seat module C3162-11, circuit CHS46 (YE/GN), harness side and ground; and between heated seat module C3162-12, circuit CHS47 (VT/GN), harness side and ground. Are the voltages less than 0.2 volt? YES : Go to U13 . NO : REPAIR the circuit. TEST the system for normal operation.
13. U13 CHECK CIRCUITS CHS46 (YE/GN) AND CHS47 (VT/GN) FOR A SHORT TO GROUND Key in OFF position. Measure the resistance between heated seat module C3162-11, circuit CHS46 (YE/GN), harness side and ground; and between heated seat module C3162-12, circuit CHS47 (VT/GN), harness side and ground. Are the resistances greater than 10,000 ohms? YES : Go to U14 . NO : REPAIR the circuit. TEST the system for normal operation.
14. U14 CHECK BETWEEN CIRCUITS CHS46 (YE/GN) AND CHS47 (VT/GN) FOR A SHORT Measure the resistance between heated seat module C3162-11, circuit CHS46 (YE/GN), harness side and heated seat module C3162-12, circuit CHS47 (VT/GN), harness side. Are the resistances greater than 10,000 ohms? YES : Go to U15 . NO : REPAIR the shorted circuits. TEST the system for normal operation.
15. U15 CHECK CIRCUITS CHS46 (YE/GN) AND CHS47 (VT/GN) FOR AN OPEN Measure the resistance between heated seat module C3162-11, circuit CHS46 (YE/GN), harness side and left rear heated seat switch C3340-6, circuit CHS46 (YE/GN), harness side; and between heated seat module C3162-12, circuit CHS47 (VT/GN), harness side and left rear heated seat switch C3340-2, circuit CHS47 (VT/GN), harness side. Are the resistances less than 5 ohms? YES : Go to U16 . NO : REPAIR the circuit. TEST the system for normal operation.
16. U16 CHECK HEATED SEAT SWITCH GROUND CIRCUIT GD133 (BK) Measure the resistance between left rear heated seat switch C3340-1, circuit GD133 (BK), harness side and ground. Is the resistance less than 5 ohms? YES : Go to U17 . NO : REPAIR the circuit. TEST the system for normal operation.
17. U17 CHECK THE REAR HEATED SEAT OPERATION USING ANOTHER SWITCH Connect the right rear heated seat switch to the left rear heated seat switch connector. Key in ON position. Check the left rear heated seat operation. Does the left rear heated seat operate correctly using the other switch? YES : INSTALL a new heated seat switch. REFER to «Heated Seat Switch - Rear»(ref-293480-S21395177072008080700000) . TEST the system for normal operation. NO : INSTALL a new heated seat module. REFER to «Heated Seat Module - Rear»(ref-293480-S37238763322008080700000) . TEST the system for normal operation.

The heated seat module receives battery voltage on circuit CBP35 (YE/GY) and ignition voltage on circuit SBB05 (GY/RD), and is supplied ground on circuit GD133 (BK). When the right rear heated seat control switch is pressed with the ignition switch in RUN or START, a ground is supplied on circuit CHS50 (BU/GY) to command the system on or off in high heat mode or circuit CHS51 (YE/GY) to command the system on or off in low heat mode. When commanded on, voltage is supplied to the heated seat switch from the heated seat module on either circuit CHS52 (BU) (high heat mode) or circuit CHS53 (WH/BN) (low heat mode) illuminating the switch indicator. The heated seat module also supplies voltage to the cushion and backrest heater mats on circuit CHS43 (GY/BU) and ground to the heater mats on circuit GD148 (BK/YE). The cushion and backrest heater mats are connected in series and operate together. Temperature is maintained by the heated seat module using a sensor contained within the cushion heater mat. The heated seat module monitors the temperature sensor on circuit VHS45 (GY/BN) for adjusting the current flow to the heater mats and uses a ground supplied on circuit RHS41 (GN/BN). The heated seat module is designed to remain on, heating the seat and maintaining temperature until switched off or the ignition power is switched OFF.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Heated seat switch
3. Heater mat
4. Heated seat module

Scheme 20

Scheme 21

Scheme 22

Scheme 23

Scheme 24

Scheme 25

Scheme 26

1. V1 CHECK CIRCUIT SBB05 (GY/RD) FOR VOLTAGE TO THE HEATED SEAT MODULE Disconnect: Heated Seat Module C3162 Measure the voltage between heated seat module C3162-17, circuit SBB05 (GY/RD) harness side and ground. Is the voltage greater than 10 volts? YES : Go to V2 . NO : VERIFY battery junction box (BJB) fuse 5 (20A) is OK. If the fuse is OK, REPAIR the circuit. TEST the system for normal operation.
2. V2 CHECK CIRCUIT CHS43 (GY/BU) FOR AN OPEN OR SHORT TO GROUND Disconnect: Right Rear Cushion Heater Mat C3169 Measure the resistance between right rear seat cushion heater mat C3169-1, circuit CHS43 (GY/BU), harness side and ground; and between C3169-1, circuit CHS43 (GY/BU), harness side and heated seat module C3162-8, circuit CHS43 (GY/BU), harness side. Is the resistance greater than 10,000 ohms between the right rear seat cushion heater mat and ground; and less than 5 ohms between the right rear seat cushion heater mat and the heated seat module? YES : Go to V3 . NO : REPAIR the circuit. TEST the system for normal operation.
3. V3 CHECK CIRCUIT VHS45 (GY/BN) FOR AN OPEN OR SHORT TO GROUND Measure the resistance between right rear seat cushion heater mat C3169-2, circuit VHS45 (GY/BN), harness side and ground; and between C3169-2, circuit VHS45 (GY/BN), harness side and heated seat module C3162-16, circuit VHS45 (GY/BN) harness side. Is the resistance greater than 10,000 ohms between the right rear seat cushion heater mat and ground; and less than 5 ohms between the right rear seat cushion heater mat and the heated seat module? YES : Go to V4 . NO : REPAIR the circuit. TEST the system for normal operation.
4. V4 CHECK CIRCUIT RHS41 (GN/BN) FOR AN OPEN OR SHORT TO GROUND Measure the resistance between right rear seat cushion heater mat C3169-3, circuit RHS41 (GN/BN), harness side and ground; and between C3169-3, circuit RHS41 (GN/BN), harness side and heated seat module C3162-13, circuit RHS41 (GN/BN) harness side. Is the resistance greater than 10,000 ohms between the right rear seat cushion heater mat and ground; and less than 5 ohms between the right rear seat cushion heater mat and the heated seat module? YES : Go to V5 . NO : REPAIR the circuit. TEST the system for normal operation.
5. V5 CHECK CIRCUITS CHS43 (GY/BU), VHS45 (GY/BN) AND RHS41 (GN/BN) FOR SHORT TO VOLTAGE Key in ON position. Measure the voltage between the following left rear seat cushion heater mat C3169 pins, harness side and ground: Connector - Pin Circuit C3169-1 CHS43 (GY/BU) C3169-2 VHS45 (GY/BN) C3169-3 RHS41 (GN/BN) Are the voltages less than 0.2 volt? YES : Go to V6 . NO : REPAIR the affected circuit. TEST the system for normal operation.
6. V6 CHECK THE BACKREST HEATER MAT GROUND CIRCUIT GD148 (BK/YE) FOR AN OPEN Key in OFF position. Disconnect: Right Rear Seat Backrest Heater Mat C3170 Measure the resistance between right rear seat cushion backrest heater mat C3170-1, circuit GD148 (BK/YE), harness side and ground. Is the resistance less than 5 ohms? YES : Go to V7 . NO : REPAIR the circuit. TEST the system for normal operation.
7. V7 CHECK THE CUSHION HEATER MAT AND SENSOR FOR SHORT TO VOLTAGE Key in ON position. Measure the voltage between right rear seat cushion heater mat C3169 pin 1, component side and ground; and between right rear seat cushion heater mat C3169 pin 2, component side and ground. Are the voltages less than 0.2 volt? YES : Go to V8 . NO : INSTALL a new cushion heater mat. TEST the system for normal operation.
8. V8 CHECK THE CUSHION HEATER MAT FOR AN OPEN OR SHORT TO GROUND Key in OFF position. Measure the resistance between right rear seat cushion heater mat C3169 pin 1, component side and ground; and between right rear seat cushion heater mat C3169 pin 1 and pin 4, component side. Is the resistance greater than 10,000 ohms between the right rear seat cushion heater mat and ground; and between 1.6 and 2.2 ohms between the right rear seat cushion heater mat pins 1 and 4? YES : Go to V9 . NO : INSTALL a new cushion heater mat. TEST the system for normal operation.
9. V9 CHECK BACKREST HEATER MAT FOR AN OPEN OR SHORT TO GROUND Measure the resistance between right rear seat backrest heater mat connector pin 2, component side and ground; and between right rear seat backrest heater mat connector pin 2 and pin 1, component side. Is the resistance greater than 10,000 ohms between the right rear seat backrest heater mat and ground; and between 1.6 and 2.2 ohms between the right rear seat backrest heater mat pins? YES : Go to V10 . NO : INSTALL a new backrest heater mat. TEST the system for normal operation.
10. V10 CHECK CIRCUIT BETWEEN BACKREST AND CUSHION HEATER MAT FOR AN OPEN AND SHORT TO GROUND Measure the resistance between right rear seat cushion heater mat C3169-4, circuit CHS44 (GN/VT), harness side and right rear seat backrest heater mat C3170-2, circuit CHS44 (GN/VT), harness side; and between right rear seat cushion heater mat C3169-4, circuit CHS44 (GN/VT), harness side and ground. Is the resistance less than 5 ohms? YES : Go to V11 . NO : REPAIR the circuit. TEST the system for normal operation.
11. V11 CHECK THE CUSHION HEATER MAT TEMPERATURE SENSOR FOR AN OPEN OR SHORT TO GROUND Measure the resistance between right rear seat cushion heater mat C3169 pin 2 and pin 3, component side; and between right rear seat cushion heater mat C3169 pin 2, component side and ground. Is the resistance less than 300,000 ohms and greater than 50 ohms between right rear seat cushion heater mat pins; and greater than 10,000 ohms between right rear seat cushion heater mat and ground? YES : Go to V12 . NO : INSTALL a new cushion heater mat. TEST the system for normal operation.
12. V12 CHECK CIRCUITS CHS50 (BU/GY) AND CHS51 (YE/GY) FOR A SHORT TO VOLTAGE Disconnect: Right Rear Heated Seat Switch C3341 Key in ON position. Measure the voltage between heated seat module C3162-14, circuit CHS50 (BU/GY), harness side and ground; and between heated seat module C3162-15, circuit CHS51 (YE/GY), harness side and ground. Are the voltages less than 0.2 volt? YES : Go to V13 . NO : REPAIR the circuit. TEST the system for normal operation.
13. V13 CHECK CIRCUITS CHS50 (BU/GY) AND CHS51 (YE/GY) FOR A SHORT TO GROUND Key in OFF position. Measure the resistance between heated seat module C3162-14, circuit CHS50 (BU/GY), harness side and ground; and between heated seat module C3162-15, circuit CHS51 (YE/GY), harness side and ground. Are the resistances greater than 10,000 ohms? YES : Go to V14 . NO : REPAIR the circuit. TEST the system for normal operation.
14. V14 CHECK BETWEEN CIRCUITS CHS50 (BU/GY) AND CHS51 (YE/GY) FOR A SHORT Measure the resistance between heated seat module C3162-14, circuit CHS50 (BU/GY), harness side and heated seat module C3162-15, circuit CHS51 (YE/GY), harness side. Are the resistances greater than 10,000 ohms? YES : Go to V15 . NO : REPAIR the circuits. TEST the system for normal operation.
15. V15 CHECK CIRCUITS CHS50 (BU/GY) AND CHS51 (YE/GY) FOR AN OPEN Measure the resistance between heated seat module C3162-14, circuit CHS50 (BU/GY), harness side and right rear heated seat switch C3341-2, circuit CHS50 (BU/GY), harness side; and between heated seat module C3162-15, circuit CHS51 (YE/GY), harness side and right rear heated seat switch C3341-6, circuit CHS51 (YE/GY), harness side. Are the resistances less than 5 ohms? YES : Go to V16 . NO : REPAIR the circuit. TEST the system for normal operation.
16. V16 CHECK HEATED SEAT SWITCH GROUND CIRCUIT GD133 (BK) Measure the resistance between right rear heated seat switch C3341-1, circuit GD133 (BK), harness side and ground. Is the resistance less than 5 ohms? YES : Go to V17 . NO : REPAIR the circuit. TEST the system for normal operation.
17. V17 CHECK THE RIGHT REAR HEATED SEAT SWITCH Connect the left rear heated seat switch to the right rear heated seat switch connector. Key in ON position. Check the right rear heated seat operation. Does the right rear heated seat operate correctly? YES : INSTALL a new heated seat switch. REFER to «Heated Seat Switch - Rear»(ref-293480-S21395177072008080700000) . TEST the system for normal operation. NO : INSTALL a new heated seat module. REFER to «Heated Seat Module - Rear»(ref-293480-S37238763322008080700000) . TEST the system for normal operation.

Pressing the left rear heated seat switch once in either the high or low mode will commanded on the left rear heated seat. Voltage is then supplied to the left rear heated seat switch from the heated seat module on either circuit CHS48 (YE) (high heat mode) or circuit CHS49 (VT) (low heat mode) illuminating the switch indicator. Pressing the left rear heated seat switch again in the mode that is currently on will set the left rear heated seat to off and also turn that LED off.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Heated seat switch
3. Heated seat module

Scheme 27

Scheme 28

Scheme 29

Scheme 30

1. W1 CHECK CIRCUITS CHS49 (VT) AND CHS48 (YE) FOR A SHORT TO GROUND Disconnect: Left Rear Heated Seat Switch C3340 Disconnect: Heated Seat Module C3162 Measure the resistance between heated seat module C3162-5, circuit CHS49 (VT), harness side and ground; and between heated seat module C3162-4, circuit CHS48 (YE), harness side and ground. Are the resistances greater than 10,000 ohms? YES : Go to W2 . NO : REPAIR the affected circuit. TEST the system for normal operation.
2. W2 CHECK CIRCUITS CHS49 (VT) AND CHS48 (YE) FOR AN OPEN Measure the resistance between left rear heated seat switch C3340-3, circuit CHS49 (VT), harness side and heated seat module C3162-5, circuit CHS49 (VT), harness side; and between left rear heated seat switch C3340-4, circuit CHS48 (YE), harness side and heated seat module C3162-4, circuit CHS48 (YE), harness side. Are the resistances less than 5 ohms? YES : Go to W3 . NO : REPAIR the affected circuit. TEST the system for normal operation.
3. W3 CHECK THE HEATED SEAT HIGH INDICATOR Connect: Left Rear Heated Seat Switch C3340 Key in ON position. Connect a fused jumper lead between heated seat module C3162-4, circuit CHS48 (YE), harness side and C3162-1, circuit SBB05 (GY/RD), harness side. Does the high indicator LED illuminate on the left rear heated seat switch? YES : Go to W4 . NO : INSTALL a new rear heated seat switch. REFER to «Heated Seat Switch - Rear»(ref-293480-S21395177072008080700000) . TEST the system for normal operation.
4. W4 CHECK THE HEATED SEAT LOW INDICATOR Connect a fused jumper lead between heated seat module C3162-5, circuit CHS49 (VT), harness side and C3162-1, circuit SBB05 (GY/RD), harness side. Does the low indicator LED illuminate on the left rear heated seat switch? YES : INSTALL a new heated seat module. REFER to «Heated Seat Module - Rear»(ref-293480-S37238763322008080700000) . TEST the system for normal operation. NO : INSTALL a new rear heated seat switch. REFER to «Heated Seat Switch - Rear»(ref-293480-S21395177072008080700000) . TEST the system for normal operation.

Pressing the right rear heated seat switch once in either the high or low mode will commanded on the left rear heated seat. Voltage is then supplied to the left rear heated seat switch from the heated seat module on either circuit CHS52 (BU) (high heat mode) or circuit CHS53 (WH/BN) (low heat mode) illuminating the switch indicator. Pressing the right rear heated seat switch again in the mode that is currently on will set the right rear heated seat to off and also turn that LED off.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Heated seat switch
3. Heated seat module

Scheme 31

Scheme 32

Scheme 33

Scheme 34

1. X1 CHECK CIRCUITS CHS53 (WH/BN) AND CHS52 (BU) FOR A SHORT TO GROUND Disconnect: Right Rear Heated Seat Switch C3341 Disconnect: Heated Seat Module C3162 Measure the resistance between heated seat module C3162-3, circuit CHS53 (WH/BN), harness side and ground; and between heated seat module C3162-6, circuit CHS52 (BU), harness side and ground. Are the resistances greater than 10,000 ohms? YES : Go to X2 . NO : REPAIR the affected circuit. TEST the system for normal operation.
2. X2 CHECK CIRCUITS CHS53 (WH/BN) AND CHS52 (BU) FOR AN OPEN Measure the resistance between right rear heated seat switch C3341-4, circuit CHS53 (WH/BN), harness side and heated seat module C3162-3, circuit CHS53 (WH/BN), harness side; and between right rear heated seat switch C3341-3, circuit CHS52 (BU), harness side and heated seat module C3162-6, circuit CHS52 (BU), harness side. Are the resistances less than 5 ohms? YES : Go to X3 . NO : REPAIR the affected circuit. TEST the system for normal operation.
3. X3 CHECK THE HEATED SEAT HIGH INDICATOR Connect: Right Rear Heated Seat Switch C3341 Key in ON position. Connect a fused jumper lead between heated seat module C3162-6, circuit CHS52 (BU), harness side and C3162-1, circuit SBB05 (GY/RD), harness side. Does the high indicator LED illuminate on the right rear heated seat switch? YES : Go to X4 . NO : INSTALL a new rear heated seat switch. REFER to «Heated Seat Switch - Rear»(ref-293480-S21395177072008080700000) . TEST the system for normal operation.
4. X4 CHECK THE HEATED SEAT LOW INDICATOR Connect a fused jumper lead between heated seat module C3162-3, circuit CHS53 (WH/BN), harness side and C3162-17, circuit SBB05 (GY/RD), harness side. Does the low indicator LED illuminate on the right rear heated seat switch? YES : INSTALL a new heated seat module. REFER to «Heated Seat Module - Rear»(ref-293480-S37238763322008080700000) . TEST the system for normal operation. NO : INSTALL a new rear heated seat switch. REFER to «Heated Seat Switch - Rear»(ref-293480-S21395177072008080700000) . TEST the system for normal operation.

Pressing the left rear heated seat switch once in either the high or low mode will commanded on the left rear heated seat. Voltage is then supplied to the left rear heated seat switch from the heated seat module on either circuit CHS48 (YE) (high heat mode) or circuit CHS49 (VT) (low heat mode) illuminating the switch indicator. Pressing the left rear heated seat switch again in the mode that is currently on will set the left rear heated seat to off and also turn that LED off.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Heated seat module

Pressing the right rear heated seat switch once in either the high or low mode will commanded on the left rear heated seat. Voltage is then supplied to the left rear heated seat switch from the heated seat module on either circuit CHS52 (BU) (high heat mode) or circuit CHS53 (WH/BN) (low heat mode) illuminating the switch indicator. Pressing the right rear heated seat switch again in the mode that is currently on will set the right rear heated seat to off and also turn that LED off.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Heated seat module

The driver seat module (DSM) receives a key out command over the medium-speed controller area network (MS-CAN) communication network and powers the driver seat rearward about 51 mm (2 in).

This pinpoint test is intended to diagnose the following

1. Easy entry/exit feature is not enabled
2. Missing status information (controller area network [CAN] communication bus messages) to the DSM: ignition switch status gear selector position
3. Wiring, terminals or connectors
4. Faulty key-in-ignition warning switch
5. Faulty DSM

The seat recliner contains a safety mechanism to prevent the backrest from being raised upright until the seat latches are latched to the strikers on the floor. When the backrest is folded down, the safety mechanism is engaged by the cable attached to the outboard latch foot and outboard recliner. The safety mechanism is disengaged when the seat latch feet are completely locked around the strikers allowing the backrest to be raised upright.

The safety belt retractor in the backrest uses a stop button in the safety belt webbing to prevent the webbing from retracting too far into the retractor. If the web stop button is damaged or missing and the seat backrest is lowered, the safety belt webbing may retract farther than intended and may also prevent the backrest from being raised fully upright. A service kit is available for web stop button installation.

This pinpoint test is intended to diagnose the following

1. Safety belt web stop button missing
2. Inboard recliner
3. Outboard recliner

Pulling the seat recliner handle releases the backrest for recline positions and to fold down. When the backrest is folded fully down, pulling the recliner handle again to the second stop position releases the seat latch feet from the strikers for the E-Z entry position. The inboard and outboard recliners operate in a synchronized manner and both will lock the backrest when upright. The outboard recliner is released directly by the recliner lever while the inboard recliner is released by a cable attached to the recliner lever.

This pinpoint test is intended to diagnose the following

1. Recliner cable disconnected or damaged
2. Outboard recliner
3. Inboard recliner

Pulling the seat recliner handle releases the backrest for recline positions and to fold down. When the backrest is folded fully down, pulling the recliner handle again to the second stop position releases the seat latch feet from the strikers for the E-Z entry position. The inboard and outboard recliners operate in a synchronized manner and both will lock the backrest when upright. When folding the backrest down, the outboard recliner is released directly by the recliner lever while the inboard recliner is released by a cable attached to the outboard recliner. If the backrest is not folded all the way down, the seat will not release to the E-Z entry position.

The seat recliner contains a safety mechanism to prevent the backrest from being raised upright until the seat latches are latched to the strikers on the floor. When the backrest is folded down, the safety mechanism is engaged by the cable attached to the inboard latch foot and outboard recliner. The safety mechanism is disengaged when the seat latch feet are completely locked around the strikers allowing the backrest to be raised upright.

This pinpoint test is intended to diagnose the following

1. Recliner cable disconnected or damaged
2. Recliner