ENGINE AND EMISSION CONTROL SYSTEM
6E1-19
A-4 ECM POWER AND GROUND CIRCUIT CHECK (Page 2 of 2)
STEP
ACTION
YES
NO
5
ECM Power Circuit Check
1) Using service wire, ground terminal E32-319 and
measure voltage between terminal E32-302
(E32-315) and ground at ignition switch ON.
Is it 10 – 14 V?
Check ground circuits
“Bl/B” and “B” for open.
If OK, then substitute a
known-good ECM and re-
check.
Go to Step 6.
6
Is operating sound of main relay heard in Step 1?
Go to Step 7.
“B/Y” or “B/R” wire
open.
7
Main Relay Check
1) Check main relay according to procedure in Step
3.
Is main relay in good condition?
“B/Y” or “B/R” wire open.
Replace main relay.
Fig. for STEP 2
Fig. for STEP 3
1. “FI” fuse
1. ECM coupler
2. Body ground
Fig. for STEP 4
1. Main relay
