Mitsubishi 380. Manual — part 341

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-32

STEP 16. Check the auto-cruise control switch.
(1) Remove auto-cruise control switch. (Refer to

P.17-75

).

(2) Measure the resistance between terminal 2 and terminal 3

when each of the "CRUISE" (MAIN), "COAST/SET",
"ACC/RES" and "CANCEL" switch is pressed.

Q: Is the resistance within specifications?

YES : Install the air bag module (driver’s side). (Refer to

GROUP 52B, Air Bag Modules and Clock Spring

P.52B-237

). Then go to Step 17.

NO : Replace the auto-cruise control switch. (Refer to

P.17-75

). Install the air bag module (driver’s side).

(Refer to GROUP 52B, Air Bag Modules and Clock
Spring

P.52B-237

). Then go to Step 18.

STEP 17. Using Diagnostic Tool MB991958, read the
diagnostic trouble code.

CAUTION

To prevent damage to Diagnostic Tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting Diagnostic Tool
MB991958.
(1) Connect Diagnostic Tool MB991958 to the data link

connector. (Refer to

P.17-11

).

(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to read the diagnostic

trouble codes. (Refer to

P.17-11

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.

Q: Is DTC 1564 set?

YES : Replace the Engine ECU.[Refer to GROUP 13A,

Engine ECU

13A-675

] . Then go to Step 18.

NO : It can be assumed that this malfunction is intermittent.

(Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunction

P.00-14

).

SWITCH POSITION

SPECIFIED CONDITION

"CRUISE" (MAIN) switch
"OFF"

Open circuit

"CRUISE" (MAIN) switch
"ON"

Less than 2 ohms

"CANCEL" switch ON

Approximately 100

Ω

"ACC/RES" switch ON

Approximately 887

Ω

"COAST/SET" switch ON

Approximately 300

Ω

1 2 3

AC203822AB

OFF

OFF

OFF

OFF

ON

ON

ON

ON

CAN

MAIN

RES

SET

2

3

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-33

STEP 18. Using Diagnostic Tool MB991958, read the
diagnostic trouble code.

CAUTION

To prevent damage to Diagnostic Tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting Diagnostic Tool
MB991958.
(1) Connect Diagnostic Tool MB991958 to the data link

connector. (Refer to

P.17-11

).

(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to read the diagnostic

trouble codes. (Refer to

P.17-11

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.

Q: Is DTC 1564 set?

YES : Return to Step 1.
NO : The procedure is complete.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-34

DTC 1575: Cancel Latch Signal System

.

DTC SET CONDITIONS

The Engine ECU communicates cancellation reten-
tion information between the two microprocessors.
This DTC is set when cancellation retention informa-
tion contains inconsistency.

.

TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CODE TO BE
SET ARE:)

Malfunction of the Engine ECU.

Circuit drawings

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• Refer to component locations GROUP-

70

DIAGNOSIS

Replace the Engine ECU.[Refer to GROUP 13A, Engine ECU

13A-675

] . Then check that diagnostic trouble code P1575 is

not set.

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-35

DTC 1571: Stoplamp Switch System

.

CIRCUIT OPERATION

• Battery positive voltage is supplied to the

stoplamp switch (terminal 2).

• When the brake pedal is depressed, battery posi-

tive voltage is applied to the ENGINE-ECU (B-21)
(terminal 18).

.

DTC SET CONDITIONS

Check Condition

• The "CRUISE" indicator lamp illuminates.

Judgement Criteria

• Short in stop lamp switch circuit.

• Open circuit in the brake switch circuit between

ENGINE-ECU(terminal 18) and ground.

.

TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CASE:)

• Malfunction of the stoplamp switch.

• Damaged harness or connector.

• Malfunction of the ENGINE-ECU.

Circuit drawings

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• Refer to component locations GROUP-

70

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

17DB043A

C-30 HARNESS
CONNECTOR:
COMPONENT SIDE

C-30

CONNECTOR: C-30