NO.4 ADVANCED KEYLESS START FUNCTION INOPERATIVE[ADVANCED KEYLESS SYSTEM]

STEP	INSPECTION	ACTION
1	• Retrieve the advanced keyless system DTC using the M-MDS. • Are there DTC displayed?	Yes	Perform the applicable DTC diagnostic procedures.
No	Go to the next step.
2	• Attempt to start the engine using the key. • Does engine start?	Yes	Go to the next step.
No	Go to symptom troubleshooting flow No.3 in 01-03 section.
3	• Does the keyless indicator light (green) turn ON when pressing the start knob?	Yes	Go to Step 11.
No	If the keyless indicator light (green) does not illuminate: • Go to the next step. If the keyless warning light (red) is flushing: • Go to Step 6. If the keyless warning light (red) illuminates: • Go to Step 9.
4	• Bring the transmitter (card key) inside the passenger compartment. • Measure the voltage at the following keyless control module terminal while pushing the start knob. ― Terminal 3E for push switch: B+ ― Terminal 3F for key reminder switch: below 1.0 V • Is the signal voltage properly?	Yes	Go to the next step.
No	• Inspect the wiring harness between the steering lock unit and keyless control. ― If the harness is normal, replace the steering lock unit. ― If the harness is malfunctioning, repair the wiring harness. • Go to the next step.
5	• Replace with a transmitter (card key) battery known to be good. • Bring the transmitter (card key) inside the passenger compartment. • Does the keyless entry system operate properly?	Yes	Replace the transmitter (card key). Then go to the next step.
No	Go to the next step.
6	• Measure the pulse profile using an oscilloscope at following keyless control module terminal (52-pin). ― Terminal 1A for exterior, right front keyless antenna ― Terminal 1C for exterior, left front keyless antenna ― Terminal 1E for exterior, rear keyless antenna ― Terminal 1I for interior, rear keyless antenna ― Terminal 1M for interior, front keyless antenna ― Terminal 1O for interior, instrument panel keyless antenna • Compare the pulse signal generating frequency between card key in communication areas and out of it. • Is the pulse signal generating frequency at card key in communication areas become longer than out of it? Note • The pulse signal generating frequency at card key in communication areas twice as longer than out of it.	Yes	Go to the next step.
No	• Inspect for open or short circuit between suspect keyless antenna and keyless control module. ― If the wiring harness normal, replace suspect keyless antenna, then go to the next step. ― If the wiring harness is not normal, repair or replace for open or short circuit, then go to the next step.
7	• Measure the pulse profile using an oscilloscope at the keyless control module terminal 3C while operating the transmitter (card key). • Is the pulse profile become long at moment of transmitter operation?	Yes	Go to the next step.
No	• Inspect the wiring harness between the keyless receiver and the keyless control module. ― If the harness is normal, replace the keyless receiver. ― If the harness is malfunctioning, repair the wiring harness. • Go to the next step.
8	• Inspect the keyless receiver. (See KEYLESS RECEIVER INSPECTION[ADVANCED KEYLESS SYSTEM].) • Is the keyless receiver normal?	Yes	Go to the next step.
No	Repair or replace malfunctioning part according to inspection result.
9	• Measure the keyless control module terminal 3H voltage. • Is the voltage approx. 5.0 V?	Yes	Go to the next step.
No	• Inspect for open or short circuit between keyless control module terminal 3H (52-pin) and keyless receiver unit terminal B (4-pin). ― If the wiring harness is not normal, repair or replace for open or short circuit, then go to the next step. ― If the wiring harness is normal, go to the next step.
10	• Replace steering lock unit. • Turn the start knob to START position. • Does the advanced keyless start operate properly?	Yes	Troubleshooting completed. Explain repairs to the customers.
No	Replace the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION[ADVANCED KEYLESS SYSTEM].) Then go to the next step.
11	• Does the keyless entry system operate properly?	Yes	Troubleshooting completed. Explain repairs to the customers
No	Re-inspect the malfunction symptoms, then repeat form Step 1 if malfunction recurs.

STEP

INSPECTION

ACTION

• Retrieve the advanced keyless system DTC using the M-MDS.

• Are there DTC displayed?

Yes

Perform the applicable DTC diagnostic procedures.

Go to the next step.

• Attempt to start the engine using the key.

• Does engine start?

Yes

Go to the next step.

Go to symptom troubleshooting flow No.3 in 01-03 section.

• Does the keyless indicator light (green) turn ON when pressing the start knob?

Yes

Go to Step 11.

If the keyless indicator light (green) does not illuminate:

• Go to the next step.

If the keyless warning light (red) is flushing:

• Go to Step 6.

If the keyless warning light (red) illuminates:

• Go to Step 9.

• Bring the transmitter (card key) inside the passenger compartment.

• Measure the voltage at the following keyless control module terminal while pushing the start knob.

― Terminal 3E for push switch: B+

― Terminal 3F for key reminder switch: below 1.0 V

• Is the signal voltage properly?

Yes

Go to the next step.

• Inspect the wiring harness between the steering lock unit and keyless control.

― If the harness is normal, replace the steering lock unit.

― If the harness is malfunctioning, repair the wiring harness.

• Go to the next step.

• Replace with a transmitter (card key) battery known to be good.

• Bring the transmitter (card key) inside the passenger compartment.

• Does the keyless entry system operate properly?

Yes

Replace the transmitter (card key). Then go to the next step.

Go to the next step.

• Measure the pulse profile using an oscilloscope at following keyless control module terminal (52-pin).

― Terminal 1A for exterior, right front keyless antenna

― Terminal 1C for exterior, left front keyless antenna

― Terminal 1E for exterior, rear keyless antenna

― Terminal 1I for interior, rear keyless antenna

― Terminal 1M for interior, front keyless antenna

― Terminal 1O for interior, instrument panel keyless antenna

• Compare the pulse signal generating frequency between card key in communication areas and out of it.

• Is the pulse signal generating frequency at card key in communication areas become longer than out of it?

Note

• The pulse signal generating frequency at card key in communication areas twice as longer than out of it.

Yes

Go to the next step.

• Inspect for open or short circuit between suspect keyless antenna and keyless control module.

― If the wiring harness normal, replace suspect keyless antenna, then go to the next step.

― If the wiring harness is not normal, repair or replace for open or short circuit, then go to the next step.

• Measure the pulse profile using an oscilloscope at the keyless control module terminal 3C while operating the transmitter (card key).

• Is the pulse profile become long at moment of transmitter operation?

Yes

Go to the next step.

• Inspect the wiring harness between the keyless receiver and the keyless control module.

― If the harness is normal, replace the keyless receiver.

― If the harness is malfunctioning, repair the wiring harness.

• Go to the next step.

• Inspect the keyless receiver.

(See KEYLESS RECEIVER INSPECTION[ADVANCED KEYLESS SYSTEM].)

• Is the keyless receiver normal?

Yes

Go to the next step.

Repair or replace malfunctioning part according to inspection result.

• Measure the keyless control module terminal 3H voltage.

• Is the voltage approx. 5.0 V?

Yes

Go to the next step.

• Inspect for open or short circuit between keyless control module terminal 3H (52-pin) and keyless receiver unit terminal B (4-pin).

― If the wiring harness is not normal, repair or replace for open or short circuit, then go to the next step.

― If the wiring harness is normal, go to the next step.

• Replace steering lock unit.

• Turn the start knob to START position.

• Does the advanced keyless start operate properly?

Yes

Troubleshooting completed.

Explain repairs to the customers.

Replace the keyless control module.

(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION[ADVANCED KEYLESS SYSTEM].)

Then go to the next step.

• Does the keyless entry system operate properly?

Yes

Troubleshooting completed. Explain repairs to the customers

Re-inspect the malfunction symptoms, then repeat form Step 1 if malfunction recurs.

4	Advanced keyless start function inoperative
POSSIBLE CAUSE	• Malfunction in the transmitter (card key). • Malfunction in the keyless control module. • Malfunction in the keyless receiver. • Malfunction in the keyless antenna. • Malfunction in the PCM.