Note. For circuit reference (Схема №20)
Circuit Description
The Powertrain Control Module (PCM) monitors the 5 volt reference signal when the Ignition is ON. If the PCM senses the 5 volt reference signal circuit is above 5.12 volts or below 4.88 volts, then DTC P1635 will set. DTC P1635 is a type A code.
Conditions required for setting this DTC are
- Ignition voltage is greater than 6.3 volts.
- Engine is running.
- The above mentioned conditions are met and one of the following two conditions are met for 5 seconds within a 10 second test sample: PCM senses the 5 volt reference signal circuit is above 5.12 volts or PCM senses the 5 volt reference signal circuit is be- low 4.88 volts.
Diagnostic Aids
Check for poor connections, or a damaged harness, inspect the harness connectors for: backed-out terminals, improper mating or damaged terminals. Also, check for open circuits, shorts to ground, and shorts to voltage.