Toronado V6-231 3.8L (1986)
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Code E033 or E034 not present
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Coolant temperature above 42.5~C (108~F).
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LV8 reading less than 144 cts.
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Conditions exist over 9.6 seconds.
Test Description:
The following numbered steps correspond with the step numbers on diagnostic charts.
1.
EI60 displays the condition of the EGR diagnostic switch. In park or neutral, the display should read "HI" (open switch).
2.
Under moderate engine load, the display will switch from "HI" to "LO".
3.* Checks the integrity of the 12V feed and ground circuits. If these circuits check OK, the fault is elsewhere in the EVRV/EGR Control circuit.
4.
* A test light connected "A" to "B" will verify the integrity of the ECM wiring and check for proper ECM operation.
5.
If "LO" was displayed at idle, disconnect the EVRV harness. If display remains "LO", the fault is either a short to ground in CKT 357 or the ECM.
6.
If the EI60 display switches from "LO" to "HI" when the EVRV is disconnected, the fault is either in the EVRV/EGR Solenoid, CKT 435 or the
ECM. Probing at terminal "B" will further isolate the
fault. If the test light is on, disconnect ECM A-B connector before checking CKT 435 for a short to ground since the short could be inside the ECM.
Diagnostic Aids:
An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside the insulation, Check
For:
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Poor Connection or Damaged Harness: Inspect ECM harness connectors for backed out terminal "D9", improper mating, broken locks, improperly
formed or damaged terminals, poor terminal to wire connection and damaged harness.
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Intermittent Test: If connections and harness checks out ok, monitor EI60 (EVRV Switch) display while moving related connectors and wiring
harness. If the failure is induced, the "EVRV Switch" display will abruptly change. This will help to isolate the location of the malfunction.
Code E033