PGM-FI Main Relay (cont’d)
Troubleshooting Flowchart
(To page 11-123)
BLK/
WHT
GRN/
YEL/ BLK
PGM-FI
MAIN RELAY
BLK/
YELBLK
YEL/
BLU
BLK/
YEL
BLK/
YEL
BLK
Engine will not start.
Inspection of PGM-FI main
relay.
Disconnect the PGM-FI main
relay connectors.
Check for continuity between
BLK terminal and body
ground.
Does continuity exist?
Measure the voltage between
YEL/BLU terminal and body
ground.
Is there battery voltage?
Turn the ignition switch ON.
Measure the voltage between
BLK/YEL terminal and body
ground.
Is there battery voltage?
Measure the voltage between
BLK/YEL terminal and body
ground.
Is there battery voltage?
Turn the ignition switch START
position with the clutch pedal
depressed.
Repair open in BLK wire between
the PGM-FI main relay and G101
(located at right middle of
engine).
Replace the ACG(S) (20 A)
fuse in the engine compart-
ment fuse/relay box.
Repair open in YEL/BLU wire
between the PGM-FI main
relay and the ACG(S) (20 A)
fuse.
Replace the No. 2 (15 A) fuse
in the under-dash fuse box.
Repair open in BLK/YEL wire
between the PGM-FI main
relay and the No. 2 (15 A)
fuse.
Replace the IG COIL (30 A)
fuse in the engine compart-
ment fuse/relay box.
Repair open in BLK/YEL wire
between the PGM-FI main
relay and the IG COIL (30 A)
fuse.
(From page 11-122)
Connect the test harness be-
tween the ECM and connector.
Disconnect “A” connector from
the ECM only, not the engine
wire harness (see page 11-37).
Measure the voltage between
BLK/WHT terminal and body
ground.
Is there battery voltage?
Check for continuity between
GRN/BLK terminal and A7 ter-
minal.
Does continuity exist?
Reconnect “A” connector to the
ECM. Reconnect the PGM-FI
main relay.
Turn the ignition switch ON.
Measure the voltage between
A23 (-) terminal and the follow-
ing terminals: A25 (+), C1 (+).
Is there battery voltage?
Turn the ignition switch OFF.
Measure the voltage between A7
(+) terminal and A23 (-) terminal
when the ignition switch is first
turned ON.
Is there 1.0 V or less?
(for 2 seconds)
Replace the PGM-FI main relay.
Replace the No. 7 (7.5 A)
fuse in the under-dash fuse
box.
Repair open in BLK/WHT wire
between the PGM-FI main
relay and the No. 7 (7.5 A)
fuse.
Repair open in GRN/BLK wire
between ECM (A7) and PGM-FI
main relay.
Repair open in YEL/BLK wire
between the ECM (A25,
CD and the PGM-FI main
relay.
Replace the PGM-FI main
relay.
Substitute a known-good ECM
and recheck. If prescribed
voltage is now available, replace
the original ECM.
Turn the ignition switch off.