Diagnostic Notes - Read Before Proceeding
Before starting TEST 1 check the following.^ Verify proper Fuel Delivery (Fuel System).
^ Verify engine is functioning properly i.e. compression test, rotor rotation and timing belt or chain routing.
^ Move all primary wires, connectors and battery cables by pushing, pulling and twisting by hand. If any bad connectors or corroded connections are found, make necessary repairs to wire or connector.
^ Disconnect secondary wire from ignition coil. Inspect the coil, distributor cap, rotor and ignition wires for cracks or carbon tracking. Replace components as needed. Check vehicle's maintenance schedule to ensure spark plugs and wires have been properly maintained.
^ START TESTING with TEST 1 - This will indicate proper testing sequence. The following is a description of the testing procedures.
TEST 1 - CHECK FIRING ORDER
TEST 2 - SPARK TEST AT PLUGS
TEST 3 - SECONDARY DISPLAYS
TEST 4 - SPARK AT COIL
TEST 5 - DISTRIBUTOR ASSEMBLY
TEST 6 - SPARK PLUG WIRE RESISTANCE
TEST 7 - PRIMARY CIRCUIT
STEP 1- Coil voltage check, ignition switch in NO position.
STEP 2- Coil voltage check, ignition switch in START position.
STEP 3- Starter solenoid and wiring check
STEP 4- Coil voltage drop
STEP 5- Wiring continuity check
STEP 6- Resistor wire resistance check
STEP 7- Ignition switch resistance check
TEST 8 - IGNITION COIL
STEP 1- Coil visual check
STEP 2- Coil primary resistance check
STEP 3- Coil secondary resistance check
TEST 9 - SPARK PLUG CHECK
TEST 10 - MICRO COMPUTER UNIT INPUTS
STEP 1- Coil secondary output check
STEP 2- Pickup coil resistance at Micro Computer Unit (MCU)
STEP 3- Pickup coil three wire connector continuity check
STEP 4- Pickup coil resistance at distributor
STEP 5- Electronic Ignition Control Unit (EICU) ground circuit check
STEP 6- Pickup coil signal check
TEST 11 - ELECTRONIC IGNITION CONTROL UNIT
STEP 1- Electronic Ignition Control Unit (EICU) voltage supply check.
STEP 2- Electronic Ignition Control Unit (EICU) voltage supply diagnosis
STEP 3- Electronic Ignition Control Unit (EICU) current draw check.