Terminal and Connector Inspection
1.

Many malfunctions in the electrical system are caused by poor harness(s) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

2.

Check the following conditions:

(1)

Check for damaged harness and terminals: contact resistance, oxidation, bent or broken terminals.

(2)

Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection

note

Use a suitable male pin to ensure that contact in sockets is good. The pin should remain in position when pulled gently.

3.

Has a problem been found?

YES

a.

Repair as necessary and go to "Verification of Vehicle Repair" procedure

NO

a.

Go to "Power Circuit Inspection" procedure.

Power Supply Circuit Inspection
Check Power to Ignition Coil
1.

IG KEY : OFF , Engine : OFF

2.

Disconnect ignition coil connectorC52/C53.

3.

IG KEY : ON , Engine : OFF

4.

Measure voltage between terminal 1 of the ignition coil harness connector C52,C53 and chassis ground.

1)

[Specification] Approx.B+

5.

Is the voltage near the specified value?

YES

a.

Go to "Ground Circuit Inspection" procedure.

NO

a.

Repair open or short to ground in harness, Go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection
Check for Open in Harness
1.

IG KEY : OFF , Engine : OFF

2.

Disconnect ignition coil connectorC52/C53.

3.

Measure resistance between terminal 2 of the ignition coil harness connectorC52/C53 and chassis ground.

1)

[Specification] Approx.0Ω

4.

Is the resistance near the specified value?

YES

a.

Go to "Control Circuit Inspection" procedure.

NO

a.

Check for an open or short to battery in the ground circuit.

b.

Repair open in harness, Go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection
Check for Open in Harness
1.

IG KEY : OFF , Engine : OFF

2.

Disconnect ignition coil connectorC52,C53 and ECM connector.

3.

Measure resistance between terminal 3 of the ignition coil harness connectorC52,C53 and 11, 12 of the ECM harness connectorC21-1.

1)

[Specification] Approx.0Ω

4.

Is the resistance near the specified value?

YES

a.

Go to "Check for Short to Ground in Harness"

NO

a.

Repair open in harness, Go to "Verification of Vehicle Repair" procedure.

Check for Short to Ground in Harness
5.

IG KEY : OFF , Engine : OFF

6.

Disconnect ignition coil connectorC52/ C53.

7.

Measure resistance between terminal 3 of the ignition coil harness connectorC52/C53 and chassis ground.

1)

[Specification] infinite(∞Ω)

8.

Does the resistance indicate open?

YES

a.

Go to "Component Inspection" procedure.

NO

a.

Repair short to chassis ground in harness, Go to "Verification of Vehicle Repair" procedure.

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