Diagnostic Aids
When making measurements on a wiring harness, both a visual inspection and a continuity test should be performed. Inspect terminal connector pins for damage and corrosion, when directed to remove a connector.
- Spark timing adjustments are not possible. Timing is controlled by the EDIS module with input from the ECA.
- When checking voltage drop to GROUND, circuit must have a voltage drop of less than one volt.
- Battery voltage (VBAT) is any voltage reading within 2 volts of actual battery voltage.
- Spark timing will vary at idle due to feedback spark strategy used to control idle speed.
- DO NOT connect positive lead of EDIS diagnostic cable to battery or connect cable to VR sensor until directed to.
- SAW and IDM signal detectors in EDIS diagnostic cable will not work unless diagnostic cable battery leads are connected to battery.
- When using DVOM to measure DC voltage always connect positive lead to BOB terminal A (+) and negative lead to A (-).
NOTE:
A 12-volt incandescent (high voltage) test light SHOULD NOT be used to test circuit signals. It will load the circuit and may cause incorrect measurements or faulty EDIS/ECA operations (engine stall).
1.9L EDIS PINPOINT TEST INDEX
| Result | Pinpoint Test & Step | |
|---|---|---|
| No Start | ||
| No Codes | A1 | |
| Continuous Memory Code 14 (PIP Signal At ECA fault) | A3 | |
| "CHECK ENGINE" Light Stays On During Engine Cranking | A1 | |
| Engine Runs | ||
| Continuous Memory Code 18 (IDM To ECA Circuit Fault) | B1 | |
| Continuous Memory Code 45 Or 46 (Coil Fault) | A12 | |
| KOER Code 18 (No System Response To SAW Commands During Self-Test) | C1 | |
| Engine Miss Driveability Complaint (No Codes) | G1 | |
| Engine Miss Driveability Complaint (With Codes) | H1 | |
NOTE:
See Fig 1
-Fig 3
and the 1.9L EDIS SYSTEM PIN VOLTAGE SPECIFICATIONS
for reference when using PINPOINT TEST procedures for the 1.9L EDIS system.
1.9L EDIS SYSTEM PIN VOLTAGE SPECIFICATIONS
| Measure Between Pins | Volts: KOEO (AC/DC) | Volts: KOEC (AC) | Volts: KOER (AC) |
|---|---|---|---|
| VRS+S (J31) & VRS-S (J32) | 0.0 AC | 0.5-2.0 | 4.0-6.0 |
| VRS+E (J35) & VRS-E (J48) | 0.0 AC | 0.5-2.0 | 4.0-6.0 |
| PIP E (J43) & PWRGND (J7) | 0.0 AC | 6.0-8.0 | 6.0-8.0 |
| C1E (J53) & PWRGND (J7) | VBAT DC | 1.0-4.0 | 2.0-7.0 |
| C2E (J55) & PWRGND (J7) | VBAT DC | 1.0-4.0 | 2.0-7.0 |
| C1C (J3) & PWRGND (J7) | VBAT DC | 1.0-4.0 | 2.0-7.0 |
| C2C (J6) & PWRGND (J7) | VBAT DC | 1.0-4.0 | 2.0-7.0 |
| SAW E (J45) & PWRGND (J7) | 0.0 AC | 0.1-2.0 | 3.0-4.0 |
| IDM E (J41) & PWRGND (J7) | 0.0 AC | 0.5-2.0 | 0.3-2.0 |
| VRS+S (J31) & PWRGND (J7) | 1.0-2.0 DC | N/A | N/A |
| VRS-S (J32) & PWRGND (J7) | 1.0-2.0 DC | N/A | N/A |
WARNING:
DO NOT connect ECA to EDIS diagnostic cable. The 60-pin connector on this harness may be connected to a Breakout Box (BOB) only. If ECA is connected to EDIS diagnostic cable it may be damaged. Some tests may require a second BOB (ECA BOB) to be connected to ECA 60-pin connector. When a second BOB is used, ECA should be disconnected at all times. Never connect ECA to BOB when performing EDIS diagnostics DO NOT bring a fluorescent trouble light (drop light) close to vehicle ignition system wiring. If key is on and VR sensor is disconnected, light may cause EDIS module to fire the ignition coil.