PGM-FI Control System — Troubleshooting Flow Chart — IMA Sensor [Without CATA] (cont'd)
6-51flowchartApplies to engines without catalytic converter (Without CATA).
1
(From page 6-50)
2
Turn the ignition switch ON.
3
Measure voltage between YEL/WHT (+) terminal and GRN/WHT (-) terminal on the wire harness.
4
Is there approx. 5V?
YES
Turn the ignition switch OFF.
Turn the ignition switch OFF.
Connect the PGM-FI test harness between the ECU and connector (page 6-19).
Turn the ignition switch ON.
Measure voltage between B20 (+) terminal and C12 (-) terminal.
Is voltage 0.5-4.5V?
NO
5
Measure voltage between YEL/WHT (+) terminal and body ground.
6
Is there approx. 5V?
YES
Repair open in GRN/WHT wire between ECU (C12) and IMA sensor.
NO
7
Turn the ignition switch OFF.
8
Connect the PGM-FI test harness between the ECU and connector (page 6-19).
9
Turn the ignition switch ON.
10
Measure voltage between C13 (+) terminal and C12 (-) terminal.
11
Is there approx. 5V?
NO
Substitute a known-good ECU and recheck. If prescribed voltage is now available, replace the original ECU.
YES
12
Repair open in YEL/WHT wire between ECU (C13) and IMA sensor.