Home ReviewsRefund
Home/Chevrolet/Tahoe/Chevrolet Tahoe I (1995-1999)/Repair manual/Testing & Diagnostics/DTC P0370 - TIMING REFERENCE HIGH RESOLUTION
Contents Wiring diagrams Section: Testing & Diagnostics All sections

DTC P0370 - TIMING REFERENCE HIGH RESOLUTION Chevrolet Tahoe I

Testing & Diagnostics ~111 words

Note. For circuit reference (Схема №11) For connector and terminal identification, see CONNECTOR IDENTIFICATION.

Circuit Description

Optical sensor provides a high resolution signal to PCM by counting pulses on sensor disk located in injection pump. High resolution is an important input by PCM for fuel control and timing. Test monitors number of high resolution pulses that have been missed (not detected). Number of pulses detected since last pump cam pulse is compared to number of pulses that should have occurred.

DTC will set when the following conditions are present

  1. A number of high resolution pulses (internal to PCM) per every 8 cam reference pulses.

More articles — Engine Controls - Tests W/codes - 6.5L