Heated Seat System - Electrical Diagnostics: Other Dodge Nitro I

Monitor Conditions

1. When Monitored: Ignition on, during the heated seat operation.

Set Conditions

1. Set Condition: This code is set immediately after the Heated Seat Module detects the control circuit shorted to ground.

Possible Causes

Scheme 3

Scheme 4

Scheme 5

Scheme 6

1. VERIFY THAT DTC B1092-FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW IS ACTIVE With the scan tool, record and erase CCN DTC's Operate the Heated Seat Switch in both positions several times. With the scan tool, read DTC's. Does the DTC B1092 - FRONT LEFT SEAT HEATER CONTROL CIRCUIT LOW reset? Yes Go To 2 . No The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
2. DISCONNECT LEFT CUSHION HEATER 2-WAY CONNECTOR AND READ DTC'S Disconnect the Left Seat Cushion Heater 2- way connector. NOTE: Check connectors - Clean and repair as necessary. With the scan tool, erase DTC's Operate the Heated Seat Switch in both positions several times. With the scan tool, read DTC's. Does the scan tool display the same DTC? Yes Go To 5 . No Go To 3 .
3. CHECK THE (P187) LEFT SEAT HEATER B(+) DRIVER FOR A SHORT TO GROUND AT THE SEAT Measure between the (P187) Left Seat Heater B(+) Driver circuit at the Left Seat Heater connector (component side) and the seat frame for a short to ground. Is the resistance below 1000 ohms? No Go To 4 . Yes Repair/replace the pigtail/heating element as necessary for a short to ground condition. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. CHECK THE LEFT HEATER ELEMENT SEAT CUSHION AND SEAT BACK RESISTANCE Gain access to the seat cushion and seat back heater connectors. Check the resistance of each of the heater elements by measuring between the (P187) Left Seat Heater B(+) Driver and the Ground circuit at the seat cushion and seat back heater connectors. For the seat cushion element the resistance value is 3 to 5.5 ohms. For the seat back element the resistance value is 4 to 6 ohms. Is the resistance correct for each heater element? Yes Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent short to ground. No Replace the heater element as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
5. Check the (P187) Left Seat Heater B(+) Driver circuit for a short to ground Ensure the Left Seat Cushion Heater 2- way connector is still disconnected. Disconnect the Heated Seat Module connector. NOTE: Check connectors - Clean and repair as necessary. Measure the (P187) Left Seat Heater B(+) Driver circuit cavity D at the HSM connector to ground. Is the resistance below 5.0 ohms? Yes Repair the (P187) Left Seat Heater B(+) Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Heated Seat Module. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. When Monitored: Ignition on, during the heated seat operation.

1. Set Condition: This code is set immediately after the Heated Seat Module detects an open in the seat heater B(+) driver circuit.

Scheme 7

Scheme 8

Scheme 9

1. VERIFY THAT DTC B1094-FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN IS ACTIVE With the scan tool, record and erase CCN DTC's Operate the Heated Seat Switch in both positions several times. With the scan tool, read DTC's. Does the DTC B1094 FRONT LEFT SEAT HEATER CONTROL CIRCUIT OPEN reset? Yes Go To 2 . No The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
2. CHECK FOR AN OPEN SEAT HEATER ELEMENT CIRCUIT Disconnect the Left Seat Cushion Heater 2- way connector. NOTE: Check connectors - Clean and repair as necessary. Measure the total resistance of the cushion and seat back heater elements at the Left Seat Cushion 2- way connector (component side). Is the total resistance 2.5 to 3.5 ohms + or -.5 ohms? Yes Go To 4 . No Go To 3 .
3. CHECK THE LEFT SEAT HEATER ELEMENT RESISTANCE Gain access to and disconnect the seat cushion and seat back heater connectors. NOTE: Check connectors - Clean and repair as necessary. Measure each of the heater elements by measuring between the (P187) Left Seat Heater B(+) Driver and the Ground circuit at the seat cushion and seat back heater connectors. For the seat cushion element the resistance value is 3 to 5.5 ohms. For the seat back element the resistance value is 4 to 6 ohms. Is the resistance correct for each heater element? Yes Check for an open in the pigtail harness and repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the heater element as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. CHECK THE LEFT SEAT HEATER GROUND CIRCUIT Using a 12-volt test light connected to 12-volts, check the (Z914) Ground circuit at the Left Seat Cushion Heater 2- way connector (harness side). Does the test light illuminate brightly? Yes Go To 5 . No Repair the (Z914) Ground circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
5. CHECK THE (P187) LEFT SEAT HEATER B(+) DRIVER CIRCUIT FOR AN OPEN Disconnect the Heated Seat Module connector. NOTE: Check connectors - Clean and repair as necessary. Measure the (P187) Left Seat Heater B(+) Driver circuit cavity D from the HSM connector to the Left Seat Cushion Heater 2- way connector (harness side). Is the resistance below 5.0 ohms? Yes Replace the Heated Seat Module. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (P187) Left Seat Heater B(+) Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 10

1. When Monitored: Ignition on, during the heated seat operation.

1. Set Condition: This code is set immediately after the Heated Seat Module detects the control circuit shorted to ground.

Scheme 11

Scheme 12

Scheme 13

1. VERIFY THAT DTC B1096-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT LOW IS ACTIVE With the scan tool, record and erase CCN DTC's Operate the Heated Seat Switch in both positions several times. With the scan tool, read DTC's. Does the DTC B1096 - FRONT RIGHT SEAT HEATER CONTROL CIRCUIT LOW reset? Yes Go To 2 . No The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
2. DISCONNECT RIGHT CUSHION HEATER 2-WAY CONNECTOR AND READ DTC'S Disconnect the Left Seat Cushion Heater 2- way connector. NOTE: Check connectors - Clean and repair as necessary. With the scan tool, erase DTC's Operate the Heated Seat Switch in both positions several times. With the scan tool, read DTC's. Does the scan tool display the same DTC? Yes Go To 5 . No Go To 3 .
3. CHECK THE (P188) RIGHT SEAT HEATER B(+) DRIVER FOR A SHORT TO GROUND AT THE SEAT Measure between the (P188) Right Seat Heater B(+) Driver circuit at the Right Seat Heater connector (component side) and the seat frame for a short to ground. Is the resistance below 1000 ohms? No Go To 4 . Yes Repair/replace the pigtail/heating element as necessary for a short to ground condition. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. CHECK THE RIGHT HEATER ELEMENT SEAT CUSHION AND SEAT BACK RESISTANCE Gain access to the seat cushion and seat back heater connectors. Check the resistance of each of the heater elements by measuring between the (P188) Right Seat Heater B(+) Driver and the Ground circuit at the seat cushion and seat back heater connectors. For the seat cushion element the resistance value is 3 to 5.5 ohms. For the seat back element the resistance value is 4 to 6 ohms. Is the resistance correct for each heater element? Yes Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent short to ground. No Replace the heater element as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
5. CHECK THE (P188) RIGHT SEAT HEATER B(+) DRIVER CIRCUIT FOR A SHORT TO GROUND Ensure the Right Seat Cushion Heater 2 - way connector is still disconnected. Disconnect the Heated Seat Module connector. NOTE: Check connectors - Clean and repair as necessary. Measure the (P188) Right Seat Heater B(+) Driver circuit cavity K at the HSM connector to ground. Is the resistance below 5.0 ohms? Yes Repair the (P188) Right Seat Heater B(+) Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Heated Seat Module. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. When Monitored: Ignition on, during the heated seat operation.

1. Set Condition: This code is set immediately after the Heated Seat Module detects an open in the seat heater B(+) driver circuit.

Scheme 14

Scheme 15

Scheme 16

1. VERIFY THAT DTC B1098-FRONT RIGHT SEAT HEATER CONTROL CIRCUIT OPEN IS ACTIVE With the scan tool, record and erase CCN DTC's Operate the Heated Seat Switch in both positions several times. With the scan tool, read DTC's. Does the DTC B1098 FRONT RIGHT SEAT HEATER CONTROL CIRCUIT OPEN reset? Yes Go To 2 . No The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
2. CHECK FOR AN OPEN SEAT HEATER ELEMENT Disconnect the Right Seat Cushion Heater 2 - way connector. NOTE: Check connectors - Clean and repair as necessary. Measure the total resistance of the cushion and seat back heater elements at the Right Seat Cushion 2 - way connector (component side). Is the total resistance 2.5 to 3.5 ohms + or -.5 ohms? Yes Go To 4 . No Go To 3 .
3. CHECK THE RIGHT SEAT HEATER ELEMENT RESISTANCE Gain access to and disconnect the seat cushion and seat back heater connectors. NOTE: Check connectors - Clean and repair as necessary. Measure each of the heater elements by measuring between the (P188) Right Seat Heater B(+) Driver and the Ground circuit at the seat cushion and seat back heater connectors. For the seat cushion element the resistance value is 3 to 5.5 ohms. For the seat back element the resistance value is 4 to 6 ohms. Is the resistance correct for each heater element? Yes Check for an open in the pigtail harness and repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the heater element as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. CHECK THE SEAT HEATER GROUND CIRCUIT Using a 12-volt test light connected to 12-volts, check the (Z914) Ground circuit at the Right Seat Cushion Heater 2 - way connector (harness side). Does the test light illuminate brightly? Yes Go To 5 . No Repair the (Z914) Ground circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
5. CHECK THE (P188) RIGHT SEAT HEATER B(+) DRIVER CIRCUIT FOR AN OPEN. Disconnect the Heated Seat Module connector. NOTE: Check connectors - Clean and repair as necessary. Measure the (P188) Right Seat Heater B(+) Driver circuit cavity K from the HSM connector to the Right Seat Cushion Heater 2 - way connector (harness side). Is the resistance below 5.0 ohms? Yes Replace the Heated Seat Module. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (P188) Right Seat Heater B(+) Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 17

1. When Monitored: Continuously

1. Set Condition: When the Heated Seat Switch in the Switch Bank is held in the on position for over 10 seconds, this code will set.

Scheme 18

Scheme 19

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase CCN DTC's Operate the Heated Seat Switch several times. Cycle the ignition from on to off. Turn the ignition on. With the scan tool, read DTC's. Does the scan tool display B10BB LEFT HEATED SEAT SWITCH INPUT CIRCUIT STUCK? Yes Go To 2 . No The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
2. SWITCH SHORTED With the scan tool, erase DTC's. Disconnect the Switch Bank connector. With the scan tool, read DTC's. Does the scan tool display B10BB - LEFT HEATED SEAT SWITCH INPUT CIRCUIT STUCK? No Replace the Switch Bank. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . Yes Go To 3 .
3. (D506) LIN BUS CIRCUIT PARTIAL SHORT TO GROUND Turn the ignition off. Disconnect the Cluster C2 connector. Measure the resistance between ground and the (D506) LIN Bus circuit. Is the resistance below 10000.0 ohms? Yes Repair the (D506) LIN Bus circuit for a partial short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Instrument Cluster in accordance with service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. When Monitored: Continuously

1. Set Condition: When the Heated Seat Switch in the Switch Bank is held in the on position for over 10 seconds, this code will set.

1. When Monitored: During heated seat operation.

1. Set Condition: This code is set immediately if the Heated Seat Module detects voltage under 10 volts on the (P693) Heated Seat Module Supply circuit.

Scheme 20

1. CHECK PCM FOR CHARGING SYSTEM DTC With the scan tool, read Powertrain Control Module DTC's. Are there any Charging System DTC's set in the Powertrain Control Module? Yes Refer to «DIAGNOSIS AND TESTING»(ref-306161-S19046811742008120900000) for Charging System diagnostic procedures. No Go To 2 . Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
2. VERIFY THAT DTC B2181 - HEATED SEAT MODULE POWER SUPPLY LOW IS ACTIVE With the scan tool, record and erase DTC's Turn the ignition switch to the Off position then start the engine and operate the heated seats for one minute. With the scan tool, read DTC's. Does the DTC B2181 - HEATED SEAT MODULE POWER SUPPLY LOW reset? Yes Go To 3 . No The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
3. (P693) HEATED SEAT MODULE SUPPLY CIRCUIT HIGH RESISTANCE Disconnect the Heated Seat Module connector. NOTE: Check connectors - Clean and repair as necessary. Start the engine and let idle. Using a 12-volt test light connected to ground, check the (P693) Heated Seat Module Supply circuit at the HSM connector. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Replace the Heated Seat Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (P693) Heated Seat Module Supply circuit as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. When Monitored: During heated seat operation.

1. Set Condition: This code is set immediately if the Heated Seat Module detects voltage over 16.0 volts on the (F937) Fused Ignition Switch Output (Run) circuit.