Mitsubishi Grandis. Manual — part 349

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-15

Step 2. Check the harness wires between key
reminder switch connector C-308 (terminal 7) and
engine-ECU <M/T> or engine-A/T-ECU <A/T>
connector C-112 (terminal 65).

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-16

NOTE: Prior to the wiring harness inspection, check
intermediate connector C-17, and repair if necessary.

Q: Are the harness wires between key reminder

switch connector C-308 (terminal 7) and
engine-ECU <M/T> or engine-A/T-ECU <A/T>
connector C-112 (terminal 65) in good condition?

YES :

Go to Step 3.

NO :

Repair the wiring harness.

Step 3. Check the immoblizer ECU power supply
circuit and earth circuit (Refer to Inspection
Procedure 4 "Check the immoblizer ECU power

supply circuit and earth circuit"

P.54A-21

.)

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the power supply and earth circuit to
the immobilizer ECU.

STEP 4. Check the trouble symptom

Check that immobilizer ECU communicates with the
MUT-III.

Q: Is the check result normal?

YES :

Intermittent Malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunctions

P.00-5

.)

NO :

Replace the immobilizer ECU, and then go
to Step 5.

AC310616

AF

Harness side

Connectors: C-17, C-112 <LHD>

C-112 (GR)

61

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64

65

66

67

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88

89

C-112

C-17

C-17

AC310629AD

Harness side

Connectors: C-17, C-112 <RHD>

C-112 (GR)

61

62

63

64

65

66

67

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C-112

C-17

C-17

AC310153AE

Connector: C-308 <LHD>

Harness side

AC310183

AE

Connector: C-308 <RHD>

Harness side

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-17

STEP 5. Check the trouble symptom

Check that immobilizer ECU communicates with the
MUT-III.

Q: Is the check result normal?

YES :

The procedure is complete.

NO :

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

INSPECTION PROCEDURE 2: The ignition key cannot be registered with the MUT-III.

CIRCUIT OPERATION

Refer to

P.54A-13

.

COMMENTS ON TROUBLE SYMPTOM

If only some ignition key cannot be registered, the
ignition key itself may be defective. If no ignition key
can be registered, the immobilizer ECU may be
defective.

POSSIBLE CAUSES

• Malfunction of ignition key

• Damaged harness wires and connectors

• Malfunction of immobilizer ECU

• Malfunction of engine-ECU <M/T> or

engine-A/T-ECU <A/T>

DIAGNOSTIC PROCEDURE

Step 1. Check that no ignition key can be
registered.

Q: Can any of the ignition keys be registered?

YES :

Replace the ignition key that cannot be

registered with new registered ignition key.

NO :

Go to Step 2.

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-18

Step 2. Connector check: Key reminder switch
connector C-308 and engine-ECU <M/T> or
engine-A/T-ECU <A/T> connector C-112

Q: Are key reminder switch connector C-308 and

engine-ECU <M/T> or engine-A/T-ECU <A/T>
connector C-112 in good condition?

YES :

Go to Step 3.

NO :

Repair the defective connector.

AC310615

AS

Harness side

Connector: C-112 <LHD>

C-112 (GR)

61

62

63

64

65

66

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AC310628AW

Harness side

Connector: C-112 <RHD>

C-112 (GR)

61

62

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64

65

66

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89

AC310153AE

Connector: C-308 <LHD>

Harness side

AC310183

AE

Connector: C-308 <RHD>

Harness side