Ignition, BENDIX REX 1 (B230F Engine - Federal) Check

Check the ground connections from ignition ECU and power stage to inlet manifold ground to ensure proper connection. If ground connections are good, disconnect one spark plug wire from a spark plug. Attach a test spark plug to the disconnected spark plug wire and ground spark plug, crank engine and monitor spark.
A strong Blue-White spark indicates an engine or fuel system malfunction. If no spark or a weak spark is present, reconnect spark plug wire to spark plug. Disconnect coil wire from distributor cap and install test spark plug. Crank engine and monitor spark. If no spark or weak spark is present, the coil or ignition system primary circuit is defective.
If a strong Blue-White spark is present, check ignition rotor, distributor housing and spark plug wires. Replace components as necessary. If all the previous steps show no defective components, proceed to next step.
Turn ignition off. Reconnect disconnected components. Ensure all connectors are secure and properly connected. With ignition off, remove panel from lower left dashboard and disconnect ignition ECU connector. Remove dust cover from connector. Visually inspect that all pin connection sleeves are at the same height.
Measure voltage at ignition ECU connector terminal No. 5. Voltage reading should be about 12 volts. If voltage is not present, check circuit between ignition ECU and fuse holder.
Turn ignition on. Open diagnostic unit and connect test lead to socket No. 6. Measure voltage at ignition ECU connector terminal No. 1. Voltage should be about 12 volts. Press button on diagnostic unit. Voltage should now read zero volt. Measure voltage at diagnostic unit connector if voltage is not present at control unit or if voltmeter reads 12 volts with button pushed.
Measure voltage at diagnostic unit connector Blue lead. Voltage should be about 12 volts. Measure resistance between diagnostic connector Black lead and ground. Ohmmeter should show continuity.
Turn ignition off. Measure resistance between diagnostic test lead and pin No. 8 (under function selector button). Ohmmeter should read infinity. Press button on diagnostic unit. Ohmmeter should now show continuity.
Using ohmmeter, test for continuity of diagnostic unit LED. Connect leads to pin under LED and to test lead. Continuity should be present in one direction only.
Turn ignition on. Measure voltage at ignition ECU terminal No. 6 (Blue). Voltage should be about 12 volts. Turn ignition off. Measure resistance, in turn, between ignition ECU connection terminals No. 20 (Brown) and 14 (Black). Ohmmeter should show continuity.

Measure resistance between ignition ECU connector terminal No. 2 (Red/Black) and ground. Ohmmeter reading should be as shown in COOLANT TEMPERATURE SENSOR RESISTANCE table. If reading is not correct, test sensor directly to determine if fault is in sensor or wiring.

COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Ohms
-4 (-20)	15,000-16,000
32 (0)	5800-6000
68 (20)	2200-2400
104 (40)	1000-1200
140 (60)	500-600
176 (80)	340-360
212 (100)	180-190

Measure resistance between ignition ECU connector terminal No. 7 (Orange) and ground. Ohmmeter should show continuity. Depress accelerator until throttle switch opens slightly. Resistance should increase to infinity. If reading is not correct, measure throttle switch resistance directly to determine if fault is in switch or wiring. Adjust throttle switch if necessary. See ON-VEHICLE ADJUSTMENTS article.
Remove panel under right side of dash and panel at right side of bulkhead. Remove glove compartment. Turn ignition off. Disconnect fuel injection ECU connector. Check for continiuty betweeen ignition ECU terminal No. 8 (Yellow) and fuel injection ECU terminal No. 25 (yellow). If continuity is not present, check connectors and wiring., If continuity is still not present, internal fault is present in one of the ECUs. Reconnect fuel injection ECU connector and replace glove compartment and panels.
Check P/M (pulse) generator by measuring resistance between ignition ECU terminals No. 10 (Red) and 23 (Blue). Resistance should be 215-265 ohms. Check that shield is connected to ECU terminal No. 11.
Disconnect knock sensor connector and place a jumper wire between terminals. Measure resistance between ignition ECU terminals No. 12 (Black) and 13 (Green). Ohmmeter should show continuity. Check that resistance to ground is infinity. If resistance is too high (infinity), remove jumper wire and test each wiring lead. If leads are intact, replace knock sensor.
Reconnect knock sensor connector. Reassemble and reconnect ignition ECU connector.
Disconnect connectors from ignition coil and power stage. Remove mounting screws and lift off ignition coil from power stage. Measure resistance across low tension side of ignition coil. Resistance should be about .5 ohm.
Measure resistance between high tension terminal and each low tension terminal. Resistance should be about 5000 ohms. If resistance is not as shown, replace ignition coil.
Turn ignition on. Check for battery voltage at Blue wire of 3-pin power stage connector. If voltage is low or does not exist, check supply lead connections at Ignition ECU and ignition coil/power stage. Check that voltage does not become less than 10.5 volts while engine is cranking. Turn ignition off.
Check that ground is present at Brown/Black wire of 3-pin power stage connector and at Black wire of 2-pin power stage connector. Using a self-powered test light or buzzer, check for continuity between Orange wire of 2-pin power stage connector and ignition ECU terminal No. 16.
If no defects are found after performing all previous steps, or if engine still malfunctions after repairs, install a new ignition ECU. Recheck system as necessary. Reinstall ignition coil. Reassemble ignition ECU connector and reconnect to ECU. Reconnect ignition coil/power stage connectors.