TC-153A Battery Temp Sensor Voltage Too Low/Too High
Diagnostic Chart:
Diagnostic Chart:
REPAIRING - BATTERY TEMP SENSOR VOLTAGE TOO LOW/BATTERY TEMP SENSOR VOLTAGE TOO HIGH
Perform DTC TEST Before Proceeding
Name of code:Battery Temp Sensor Voltage Either Too High Or Too Low
When monitored: With the ignition key on.
Set condition: The PCM senses the voltage from the BTS to be either below 0.1 volts or above 4.9 volts for 3 seconds.
Theory of operation: The battery temp sensor (BTS) voltage is used by the PCM to determine what the charging system goal should be. The PCM uses that goal to determine the charging output level. The battery temp sensor is also used to disable EGR operation and OBDII monitors at cold ambients. The battery temp sensor is internal to the PCM.
Possible causes:
PCM failure
INACTIVE TROUBLE CODE CONDITION
You have just attempted to simulate the condition that initially set the trouble code message. The following additional checks may assist you in identifying a possible intermittent problem:
- Visually inspect related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
- Visually inspect the related harnesses. Look for chafed, pierced, or partially broken wire.
- Refer to any hotlines or technical service bulletins that may apply.