PGM-FI Control System — Troubleshooting Flowchart — MAP Sensor (cont'd)
6-27flowchartMAP sensor troubleshooting flowchart continuation. NOTE: one branch references '(page 6-149)' as printed (possible manual typo for 6-19) — transcribed verbatim.
1
(From page 6-26)
2
Is there approx. 5 V ?
YES
Measure voltage between WHT (+) terminal and GRN/WHT (-) terminal.
Measure voltage between WHT (+) terminal and GRN/WHT (-) terminal.
Is there approx. 5 V ?
NO
3
Measure voltage between YEL/RED (+) terminal and body ground.
4
Is there approx. 5 V ?
YES
Repair open in GRN/WHT wire between ECU (C14) and MAP sensor.
NO
5
Turn the ignition switch OFF.
6
Connect the PGM-FI test harness between the ECU and connector (page 6-19).
7
Measure voltage between C15 (+) terminal and C14 (-) terminal with the ignition switch on.
8
Is there approx. 5 V ?
NO
Substitute a known-good ECU and recheck. If prescribed voltage is now available, replace the original ECU.
YES
9
Repair open in YEL/RED wire between ECU (C15) and MAP sensor.