Test U: DTC B1317 Or B1318 - Battery Voltage Low Or High
PINPOINT TEST U: DTC B1317 OR B1318 - BATTERY VOLTAGE LOW OR HIGHNormal Operation
Under normal operation, the electronic manual temperature control (EMTC) or electronic automatic temperature control (EATC) module receives a ground through circuit GD111 (BK/BU). The EMTC or EATC module is supplied constant battery voltage through circuit SBP15 (WH/RD) and ignition switched voltage through circuit CBP37 (WH).
- DTC B1317 Battery Voltage High - The module senses when battery voltage is greater than 16 volts.
- DTC B1318 Battery Voltage Low - The module senses when battery voltage is less than 9 volts.
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- EMTC module
- EATC module
U1:
