NO.1 KEYLESS CONTROL MODULE DOES NOT OPERATE NORMALLY

id0903d2832200

Applied VIN (assumed):
• JMZ NC1882*# 100001-103859
• JMZ NC18820# 100001-103859
• JMZ NC18F2*# 100001-103859
• JMZ NC18F20# 100001-103859
• JMZ NC18F6*# 100001-103859
• JMZ NC18F60# 100001-103859
• JM0 NC30F100 100001-100545

1

One or more on-board diagnostic functions inoperative

DESCRIPTION

• Malfunction in trunk lid opener system, horn system, hazard warning light system, or door lock linkage system

POSSIBLE CAUSE

• Malfunction in keyless control module power supply
- Open circuit in IG1 and/or B+ power supply circuit
- Open or short circuit in ground circuit
- Keyless control module malfunction
• Malfunction in keyless switch related circuit
- Keyless switch malfunction
• Malfunction in door switch signal circuit
- Open or short circuit in wiring between keyless control module and door switch
- Door switch malfunction
• Malfunction in door lock/unlock signal circuit
- Door lock actuator malfunction
- Open or short circuit in wiring between keyless control module and door lock actuator
• Malfunction in turn light signal circuit
- Flasher unit malfunction
- Open or short circuit in wiring between flasher unit and each turn signal light

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT FOR MALFUNCTION IN KEYLESS UNIT POWER SUPPLY CIRCUIT OR ELSEWHERE

• Did any of the following operate during the malfunction diagnosis?
- All doors lock/unlock.
- Hazard warning light flashes.
Yes
Go to the next step.
No
Inspect the connection of the keyless control module connectors, and then go to Step 4.
2

INSPECT FOR MALFUNCTION IN KEYLESS SWITCH OR ELSEWHERE

• Did the following operate during the malfunction diagnosis?
- All doors lock/unlock.
Yes
Go to the next step.
No
Go to step 7.
3

INSPECT FOR MALFUNCTION IN DOOR LOCK ACTUATOR OR ELSEWHERE

• Did the following operate during the malfunction diagnosis?
- Hazard warning light flashes.
Yes
Go to the next step.
No
Go to step 8.
4

INSPECT KEYLESS UNIT POWER SUPPLY CIRCUIT

• Are the keyless control module power supply and voltage normal?

- IG1 signal (terminal 3B)

- B+ signal (terminal 1E, 1F)

Yes
Go to the next step.
No
• Inspect for a burnt fuse.
• Inspect the power supply system wiring harness for an open or short circuit.
5

INSPECT KEYLESS UNIT GROUND CIRCUIT

• Is the keyless control module ground voltage normal?

- 0V (terminal 1B, 3C)

Yes
Go to the next step.
No
Inspect the ground system wiring harness for an open circuit.
6

INSPECT LATCH SWITCH SIGNAL VOLTAGE

•  Are the wiring harnesses between the keyless control module and each door switch normal?
- Inspect each terminal (4O and 4T) under the following conditions.
• Door closed: B+
• Door open: 2.0V or less
Yes
Go to the next step.
No
• Inspect the door switch.
• Inspect the door switch system wiring harness for a short circuit.
7

INSPECT KEYLESS SWITCH

• Is the keyless switch normal?
Yes
Replace the keyless control module.
No
Replace the keyless switch.
8

INSPECT DOOR LOCK ACTUATOR OPERATION SIGNAL

• Is the signal voltage transmitted to the door lock actuator normal?
• Does the signal voltage transmitted to the door lock actuator change as follows when the malfunction diagnosis inspection procedure is performed.
- All doors locked: Cycles 1.0 V or less →B+→1.0 V or less (terminal 1A)
- All doors unlocked: Cycles B+→1.0 V or less→B+ (terminal 1C)
Yes
Go to the next step.
No
• Inspect the wiring harness between the keyless control module and the door lock actuator for an open or short circuit.
• Inspect the door lock actuator.
9

INSPECT TURN LIGHT SIGNAL VOLTAGE

• Is the signal voltage transmitted to each turn light normal?
• Does the signal voltage transmitted to each turn light change as follows when the malfunction diagnosis inspection procedure is performed.
- Alternates between 1.0 or less and B+ (terminal 4N)
Yes
Verify the malfunction symptom again.
No
• Inspect the wiring harnesses between the keyless entry module and each turn light for a short circuit.
• Inspect each turn light.