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B1370 CADILLAC

B1370 CADILLAC - Device Ignition On and Start Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

B1370 CADILLAC Possible Causes

  • Faulty Ignition Switch
  • Ignition Switch harness is open or shorted
  • Ignition Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How do I fix code B1370 CADILLAC

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

B1370 CADILLAC Tech Notes

DTC B1370 01 Device Ignition 1 ON and START Circuit Short to Battery
DTC B1370 06 Device Ignition 1 ON and START Circuit Short to Ground or Open

Cost of diagnosing the B1370 CADILLAC code

    Labor: 1.0

    The cost of diagnosing the B1370 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

B1370 CADILLAC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1370 CADILLAC Meaning

The vehicle Power Mode Master (PMM) is the Body Control Module (BCM). The ignition switch is a low current switch with multiple discrete ignition switch signals to the PMM for determination of the power mode. The PMM receives the ignition switch signals, and additionally a reference voltage signal from the BCM, through the ignition switch, and back to the BCM. There are redundancies within the PMM system that can allow operation of certain subsystems when there are faults in the ignition switch circuits. Other information such as serial data input from other modules and DTCs is also used to determine what power mode signals and information is transmitted by the PMM. The BCM logic uses all this information to identify the operator's desired power mode and activate specific discrete signals, and serial data messages for the operation of different subsystems as necessary. Other modules which have switched voltage inputs may operate in a default mode if the PMM serial data message does not match what the individual module can detect from its own connections.
The PMM will activate relays and other direct outputs of the PMM as needed according to the calculated power mode. Some relays controlled by the BCM are switched ignition voltage outputs that are pass through circuits within the BCM directly from the ignition switch. If these circuits short to ground, the B+ circuit fuse to the ignition switch will open.
OBDII Code B1370 CADILLAC - Device Ignition On and Start Circuit - Engine-Codes.com

B1370 CADILLAC More Information

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