3.
ARE THE WIRES O.K ? & ARE THE CONNECTIONS O.K ?
YES
a.
Go to "Signal Circuit Inspection" procedure
NO
a.
Repair as necessary and go to " Verification of Vehicle Repair " procedure
Check for damaged harness and terminals including rubber seals :
-. contact resistance, oxidation, corrosion, bent or broken terminals
-. harness connector connection, loose wires etc.
Check for poor connection between ECM and component :
-. backed out terminal, improper mating, broken locks and poor terminal to wire connection
ARE THE WIRES O.K ? & ARE THE CONNECTIONS O.K ?
YES
Go to "Signal Circuit Inspection" procedure
NO
Repair as necessary and go to " Verification of Vehicle Repair " procedure
DTCs listed below are stored in the scan tool
P1616
Check items with the scan tool and the multimeter
① Wiring harness inspection
② Check the fuse
③ Check the relay resistance
Specification
Resitance : below 1 Ω for open in the wire
Resitance : infinite for short to ground in the wire
Voltage : below 0.5V for short to power in the wire
Refer to the component and full circuit for connector configrations details
Disconnect the main relay after turning the ignition switch ON, measure the voltage at the main relay terminal 2 and the main relay terminal 5 individually
ARE THERE THE BATTERY VOLTAGE ?
YES
Go to step 4
NO
Go to step 3
ARE THE FUSES BLOWN ?
YES
Repair open or short in the wire between the main relay terminal 4 and the ECM terminal 13/C230-1
Repair open or short in the wire between the main relay terminal 5 with the terminal 2 and ECM fuse(40A)
Replace the fuse if the fuse is broken.
Replace the relay if the relay is defective after checking continuity between the relay terminal 2 and terminal 4. For more detailed information, Go to "Component Inspection" procedure
Go to step 4
NO
Go to step 4
Turn the ignition switch from OFF to ON for the relay operation.
IS THERE A MAIN RELAY ON ?
YES
Go to "Verification of Vehicle Repair" procedure
NO
Go to step 6
Connect the CH A,B probe of scan tool to the ECM terminal 4 or 5/C230-1 and the ECM terminal 13/C230-1 in order to check the signal waveform.
Check the signal waveform when when turn the ignition switch from OFF to ON several times.
IS THERE THE SIGNAL WAVEFORM PROPERLY DISPLAYED ?
YES
Go to "Verification of Vehicle Repair" procedure
NO
Recheck open or short in the wire between the fuse No.21(10A) and the ECM terminal 58/C230-1.
Recheck open or short in the wire between the main relay terminal 1 and the ECM terminal 4 or 5 /C230-1
Replace the ECM fuse No.1(20A), ECM No.2(20A) and the fuse No.21(10A) if the fuses are broken.
Replace a known - good ECM and recheck. If the problem is verified, replace the ECM.
WAVEFORM ANALYSIS
This test should be inspected after depressing the HOLD mode after turning the ignition switch ON and OFF. When the ignition switch is turned ON, the battery voltage is supplied to the terminal 58/C230-1. And then, the battery voltage is output from the main relay terminal 4 and 5. If the signal waveform pattern is not indicated as above waveform, replace the relay.
YES
Go to "Verification of Vehicle Repair" procedure.
