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Home >> GMC >> 1997 >> Forward Control 4.3 W, L35, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls - Tests W/Codes - 6.5L Diesel (P Series)) >> Diagnostic Trouble Codes >> DTC P1217 - Fuel Solenoid Response Time Too Long >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different variant/trim than selected.
  1. Perform Powertrain ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK. See the BASIC TESTING article. Then go to next step.
  2. Check if DTC P0370 is set. If DTC P0370 is set, go to DTC P0370. If DTC P0370 is not set, go to next step.
  3. Start and warm engine to normal operating temperature. Using scan tool, observe injection pump closure time. If scan tool displays injection pump closure time greater than 2.4 milliseconds, go to next step. If scan tool displays injection pump closure time less than 2.4 millisecond, go to step 5).
  4. Turn on all accessories. Engine idling. Using DVOM connected to ground, check voltage at FUEL SOL fuse (fuel solenoid driver ignition feed circuit) in underhood relay center. If voltage is 11-16 volts, go to step 7). If not, go to step 6).
  5. DTC is intermittent. If no additional DTCs are set, see DIAGNOSTIC AIDS. If any additional DTCs are set, go to applicable DTC test.
  6. Check fuel solenoid driver ignition feed circuit for poor connections or aftermarket add-ons. Repair as necessary. After repairs, go to step 8).
  7. Replace fuel injection pump. If fuel injection pump is replaced, new pump must be timed. See the ADJUSTMENTS article. After replacing injection pump, go to next step.
  8. Using scan tool, select DTC, CLEAR INFO. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter DTC P1217. Operate vehicle within the conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step 2).
  9. Using scan tool, select CAPTURE INFO, REVIEW INFO. If any undiagnosed DTC(s) are displayed, go to applicable DTC test.
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