Mitsubishi L200. Manual — part 285

AC510056AD

Harness side

B-10 (B)

Connector: B-10

AC510056AG

B-14 (B)

Connector: B-14

Harness side

AC510057

Harness side

A/T-ECU

C-20

AC

Connector: C-20

A/T-ECU

<RHD>

<LHD>

AC509613AG

Connector: C-52 <LHD>

C-52

Harness side

AC509934

Connectors: C-207, C-208 <LHD>

Junction block (Front view)

C-208

CX

Harness side

C-207

AC509936

Connectors: C-207, C-208 <RHD>

Harness side

C-208

C-207

BZ

Junction block
(Front view)

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-47

OPERATION
The inhibitor switch detects the selector lever posi-
tion (P, R, N,D, 2 or L) which the driver has selected,
and sends the information to the A/T-ECU.

DIAGNOSIS CODE SET CONDITIONS
If the inhibitor switch has not been sending any sig-
nal for at least 30 seconds, an open circuit may be
present and diagnosis code No.P1770 (P0705) is
set.

PROBABLE CAUSES

• Malfunction of the inhibitor switch

• Damaged harness wires and connectors

• Malfunction of the A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list
Item 34: Inhibitor switch

P.23A-103

(Refer to data list

reference table).

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Cope with Intermittent

Malfunction ).

NO <none of the selector lever positions are
displayed on M.U.T.-III> :

Go to Step 2.

NO <only one of the selector lever positions is not
displayed on M.U.T.-III> :

Go to Step 6.

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-48

STEP 2. Check the inhibitor switch.
Refer to

P.23A-113

.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Replace the inhibitor switch.

STEP 3. Connector check: B-14 Inhibitor switch
connector, C-208 J/B connector, B-10 and C-52
intermediate connector
Check for the contact with terminals.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

STEP 4. Check the harness between inhibitor
switch connector B-14 terminal No.7 and J/B
connector C-208 terminal No.2.
Check the power supply line for open circuit.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the wiring harness.

STEP 5. M.U.T.-III data list
Item 34: Inhibitor switch

P.23A-103

(Refer to data list

reference table).

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Cope with Intermittent

Malfunction ).

NO :

Replace the A/T-ECU.

STEP 6. Check the inhibitor switch.
Refer to

P.23A-118

.

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Replace the inhibitor switch.

STEP 7. Connector check: B-14 inhibitor switch
connector, C-20 A/T-ECU connector, B-10
intermediate connector.
Check for the contact with terminals.

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Repair the defective connector.

STEP 8. Check the harness between inhibitor
switch connector B-14 terminal No.1, 8, 2, 3, 4, 5
and A/T-ECU connector C-20 terminal No.55, 66,
56, 67, 68, 58.
Check the output line for open circuit.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the wiring harness.

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-49

Code No.P1770 (P0705): Inhibitor switch system <5A/T>

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple

AC903907

INHIBITOR
SWITCH

IGNITION
SWITCH (IG1)

Inhibitor switch system circuit

A/T-ECU

<LHD>
<RHD>

AC510056AD

Harness side

B-10 (B)

Connector: B-10

AC510056AG

B-14 (B)

Connector: B-14

Harness side

AC510057

Harness side

A/T-ECU

C-20

AC

Connector: C-20

A/T-ECU

<RHD>

<LHD>

AC509930AG

Connector: C-34 <RHD>

C-34

Harness side

AC509613AG

Connector: C-52 <LHD>

C-52

Harness side

AC509934

Connectors: C-207, C-208 <LHD>

Junction block (Front view)

C-208

CX

Harness side

C-207

AC509936

Connectors: C-207, C-208 <RHD>

Harness side

C-208

C-207

BZ

Junction block
(Front view)

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-50

OPERATION
The inhibitor switch detects the selector lever posi-
tion (P, R, N, D) which the driver has selected, and
sends the information to the ECU.

DIAGNOSIS CODE SET CONDITIONS
If the inhibitor switch has not been sending any sig-
nal for at least 30 seconds, an open circuit may be
present and diagnosis code No.P1770 (P0705) is
set.

PROBABLE CAUSES

• Malfunction of the inhibitor switch

• Damaged harness wires and connectors

• Malfunction of the A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list
Item 34: Inhibitor switch (Refer to Data List Refer-
ence Table

P.23A-103

).

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Cope with Intermittent

Malfunction ).

NO none of the selector lever positions are
displayed on M.U.T.-III :

Go to Step 2.

NO only one of the selector lever positions is not
displayed on M.U.T.-III :

Go to Step 6.

STEP 2. Check the inhibitor switch.
Refer to

P.23A-118

.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Replace the inhibitor switch.