PGM-FI Control System — Troubleshooting Flowchart — MAP Sensor (cont'd)
6-31flowchartMAP sensor troubleshooting flowchart, final continuation page.
1
(From page 6-30)
2
Start engine.
3
Is there vacuum?
NO
-Remove restriction from throttle body. -Replace throttle body.
YES
4
Stop engine.
5
Connect the PGM-FI test harness between the ECU and connector (page 6-19).
6
Turn the ignition switch ON.
7
Measure voltage between C11 (+) terminal and C14 (-) terminal.
8
Is there approx. 3 V ?
NO
Inspect for an open in WHT wire between the MAP sensor and ECU. If wire is OK, replace the MAP sensor.
YES
Substitute a known-good ECU and recheck. If symptom/indication goes away, replace the original ECU.