CONTROL MODULE POWER SUPPLY AND GROUND LINE
1. Check Main Relay.
a. Turn the Ignition Switch to "OFF".
b. Remove Main Relay.
c. Connect Battery to Main Relay terminals No. 1 and No. 2.
d. Measure resistance between Main Relay terminals.
[CHECK]: Terminals:
No. 3 - No. 5/10 Ohms or less.
No. 4 - No. 6/10 Ohms or less.
[YES]: Go to step 2.
[NO]: Replace Main Relay.
2. Check power supply circuit of Engine Control Module (ECM).
a. Install Main Relay .
b. Disconnect connectors from ECM.
c. Turn Ignition Switch to "ON".
d. Measure power supply voltage between ECM connector terminals.
[CHECK]: Connector & terminal:
(B84) No. 15 - No. 96/10 Volts or more.
(B84) No. 16 - No. 96/10 Volts or more.
(B84) No. 42 - No. 96/10 Volts or more.
[YES]: Go to step 3.
[NO]: Repair harness of power supply circuit.
3. Check ground circuit of ECM.
a. Turn Ignition Switch to "OFF".
b. Measure resistance at harness connector between ECM and body.
[CHECK]: Connector & terminal:
(B84) No. 25 - Body/1O Ohms or less.
(B84) No. 45 - Body/1O Ohms or less.
(B84) No. 46 - Body/1O Ohms or less.
(B84) No. 69 - Body/1O Ohms or less.
(B84) No. 70 - Body/1O Ohms or less.
(B84) No. 71 - Body/1O Ohms or less.
(B84) No. 72 - Body/1O Ohms or less.
(B84) No. 95 - Body/1O Ohms or less.
(B84) No. 96 - Body/1O Ohms or less.
[YES]: Check Ignition control system.
[NO]: Repair harness between ECM connector and body.