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Starter System Circuit Troubleshooting

i-SHIFT model
NOTE:
  • Air temperature must be between 15 and 38 °C (59 and 100 °F) during this procedure.
  • After this inspection, you must reset engine control module (ECM), otherwise the ECM will continue to stop the fuel injectors from functioning. Select ECM reset using the Honda Diagnostic System (HDS).
  • The battery must be in good condition and fully charged.
  1. Check the No. 24 (10 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES -
Go to Step 2 .
NO -
Replace the fuse and recheck.■
  1. Turn the ignition switch to ON (II).
  1. Check the BRAKE SWITCH in the DATA LIST with the HDS.
Dose it indicate OFF?
YES -
Go to Step 6 .
NO -
  1. Press the brake pedal, and check the BRAKE SWITCH in the DATA LIST with the HDS.
Dose it indicate ON?
YES -
Go to Step 13 .
NO -
Go to Step 7 .
  1. Turn the ignition switch OFF.
  1. Disconnect the brake pedal position switch 4P connector.
  1. Measure the voltage between brake pedal position switch 4P connector terminal No. 1 and body ground.
Is there battery voltage?
YES -
Go to Step 10 .
NO -
Repair open in the wire between the brake pedal position switch 4P connector terminal No. 1 and under-hood fuse/relay box.■
  1. Turn the ignition switch to ON (II).
  1. Jump the SCS line with the HDS, then turn the ignition switch OFF.
    NOTE: This step must be done to protect the ECM from damage.

  1. Check for continuity between ECM connector terminal A42 and the brake pedal position switch 4P connector terminal No. 2.
Is there continuity?
YES -
NO -
Repair open in the wire between ECM (A42) and the brake pedal position switch 4P connector terminal No. 2.■

  1. Hook up the following equipment:
    • Ammeter, 0−400 A
    • Voltmeter, 0−20 V (accurate within 0.1 V)
  1. Turn the ignition switch to ON (II).
  1. Select PGM-FI, INSPECTION, then ALL INJECTORS OFF on the HDS.
  1. With the shift lever in N position, the brake pedal pressed, turn the ignition switch ON (II), and press the engine start switch.
Did the starter crank the engine normally?
YES -
The starting system is OK. Go to Step 21 .
NO -
Go to Step 17 .
  1. Check the battery condition. Check electrical connections at the battery, the negative battery cable to body, the engine ground cables, and the starter for looseness and corrosion. Then try cranking the engine again.
Did the starter crank the engine?
YES -
Repairing the loose connection corrected the problem. The starting system is OK. Go to Step 23 .
NO -
Check the following:
  • If the starter will not crank the engine at all, go to Step 18 .
  • If the starter cranks the engine erratically or too slowly, go to Step 20 .
  • If the starter does not disengage from the flywheel ring gear when you release the switch, replace the starter, or remove and disassemble it and check for the following:
  • -
    Solenoid plunger and switch malfunction
    -
    Dirty drive gear or damaged overrunning clutch

  1. Make sure the transmission is in Neutral, and set the parking brake. Disconnect the connector (A) from the starter solenoid S terminal. Connect a jumper wire from the battery positive terminal to the solenoid terminal.
Did the starter crank the engine?
YES -
Go to Step 19 .
NO -
Remove the starter, and repair or replace as necessary.■
  1. Check the following items in the order listed until you find the open circuit:
    • The BLK wire and connectors between the under-dash fuse/relay box and the starter cut relay 2.
    • The BLU wire and connectors between the starter cut relay 2 and the starter.
  1. While cranking the engine, check the cranking voltage and the current draw.
Is the cranking voltage greater than or equal to 8.0 V (KQ, KZ models), 9.0 V (Except KQ, KZ models) and the current draw less than or equal to 200 A (KQ, KZ models), 150 A (Except KQ, KZ models)?
YES -
Go to Step 21 .
NO -
Replace the starter, or remove and disassemble it, and check for the following:
  • Drag in the starter armature
  • Shorted armature winding
  • Excessive drag in the engine
  1. Check the engine speed while cranking the engine.
Is the engine speed above 100 rpm (min −1 )?
YES -
Go to Step 22 .
NO -
Replace the starter, or remove and disassemble it, and check for the following:
  • Open circuit in the starter armature commutator segments
  • Excessively worn starter brushes
  • Open circuit in the commutator brushes
  • Dirty or damaged helical splines or drive gear
  • Faulty drive gear clutch
  1. Remove the starter, and inspect its drive gear and the flywheel ring gear for damage. Replace any damaged parts.
  1. Select ECM reset to cancel ALL INJECTORS OFF on the HDS.