Driver Thermistor Out Of Range Low

Monitored & Set Condition

1. When Monitored: Ignition on, during the heated seat operation.
2. Set Condition: This code is immediately set when the Memory Heated Seat/Mirror Module senses a lesser value than the value stored in EEPROM.

Possible Causes:

• Driver Seat Temp Sensor Input Open
• Driver Seat Temp Sensor Input Short To Ground
• Driver Seat Heater Sensor Open
• Driver Seat Temp Sensor Short To Ground
• Seat Temperature 5-Volt Wire Open
• Driver Seat Temperature 5-Volt Supply Short To Ground
• Memory Heated Seat Mirror Module
• Memory Heated Seat Mirror Module

Testing

1. Turn ignition on. Raise driver seat to highest position to gain access to seat components and connectors. Turn ignition off. Disconnect driver heated seat cushion 4-pin connector. Turn ignition on. Turn driver heated seat switch on. Measure voltage between ground and driver heated seat cushion 4-pin connector terminal "D", driver seat temperature 5-volt supply circuit (Black/Dark Green wire). See Figure . If voltage is 4.5 volts or more, leave driver heated seat cushion 4-pin connector disconnected and go to next step. If voltage is less than 4.5 volts, leave driver heated seat cushion 4-pin connector disconnected and go to step  6 .
2. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C1. Measure resistance of driver seat temperature sensor input circuit (Tan/Light Blue wire) between driver heated seat cushion connector terminal "C" and MHSMM connector C1 terminal No. 4. See Figure and Figure . If resistance is less than 5 ohms, leave driver heated seat cushion 4-pin connector disconnected and go to next step. If resistance is more than 5 ohms, repair open in Tan/Light Blue wire.
3. Measure resistance between ground and driver heated seat cushion connector (component side) terminal "C", driver seat temperature sensor input circuit. See Figure . If resistance is more than 5 ohms, leave driver heated seat cushion 4-pin connector disconnected and go to next step. If resistance is 5 ohms or less, replace driver heated seat cushion. See POWER SEATS article.
4. Disconnect MHSMM connector C1. Measure resistance between ground and driver heated seat cushion connector terminal "C", driver seat temperature sensor input circuit (Tan/Light Blue wire). If resistance is less than 100 ohms, repair short to ground in Tan/Light Blue wire. If resistance is 100 ohms or more, leave driver heated seat cushion 4-pin connector disconnected and go to next step.
5. Measure resistance between driver heated seat cushion connector (component side) terminal "C", driver seat temperature sensor input circuit (Tan/Light Blue wire) and terminal "D", driver seat temperature 5-volt supply circuit (Black/Dark Green wire). If resistance is less than 70 k/ohms, replace MHSMM. See MEMORY HEATED SEAT/MIRROR MODULE  under REMOVAL & INSTALLATION. If resistance is 70 k/ohms or more, replace driver heated seat cushion. See POWER SEATS article.
6. Turn ignition off. Disconnect Memory Heated Seat/Mirror Module (MHSMM) connector C2. Measure resistance between ground and driver heated seat cushion 4-pin connector terminal "D", driver seat temperature 5-volt supply circuit (Black/Dark Green wire). See Figure . If resistance is less than 100 ohms, repair short to ground in Black/Dark Green wire. If resistance is 100 ohms or more, leave driver heated seat cushion 4-pin connector and MHSMM connector C2 disconnected and go to next step.
7. Measure resistance of driver seat temperature 5-volt supply circuit (Black/Dark Green wire) between driver heated seat cushion 4-pin connector terminal "D" and MHSMM connector C2 terminal No. 15. See Figure and Figure . If resistance is less than 5 ohms, replace MHSMM. See MEMORY HEATED SEAT/MIRROR MODULE  under REMOVAL & INSTALLATION. If resistance is 5 ohms or more, repair open in Black/Dark Green wire.