Mitsubishi Outlander XL. Manual - part 497

DTC P0988: Low-Reverse Brake Pressure Switch System

M12301000423USA0000010000

PRESSURE SWITCH SYSTEM CIRCUIT
Refer to P.23A-91.

DESCRIPTIONS OF MONITOR METHODS

｠

During  reverse  driving,  the  switch  OFF  status
continues for 2 seconds. (The detection is achieved
twice during 1 driving cycle*1, and it continues for 2
driving cycles.)
*1: Indicates the series of driving cycle "ignition key
OFF → ON → drive → OFF." The "1 driving cycle,"
"2  driving  cycle,"  and  so  on  indicates  how  many
cycles are required to detect a failure.

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

｠

Malfunction  of  the  low-reverse  brake  pressure
switch system circuit

｠

Damaged harness or connector

｠

Malfunction of the TCM

｠

Malfunction  of  the  low-reverse  brake  pressure
switch system (valve body assembly)

｠

Malfunction of the valve body assembly, abnormal
hydraulic circuit valve.

For  the  incomplete  gear  shifting  and  slippage,
first refer to the SYMPTOM CHART P.23A-23.

 

DIAGNOSIS

STEP 1. Check the DTC.

Q:Is  the  DTC  other  than  the  pressure  switch  set?  (Is  the

code other than P0841, P0846, P0871, P0876, and P0988

set?)

YES:

 Check and repair the relevant DTC system.

NO:

 Go to Step 2.

STEP 2. Check the TCM terminal voltage.
[C-37 TCM connector (vehicle side, connected)]
Measure the voltage between C-37 terminal No. 43 and body
ground.

｠

Low-reverse brake engaged: 0 V

｠

Other than above: Battery positive voltage

Q:Is the check result normal?

YES:

 Go to Step 3.

NO:

 Go to Step 7.

STEP 3. Check between the TCM connector and A/T control
solenoid valve assembly.
Check for continuity between C-37 TCM connector and B-111
A/T control solenoid valve assembly connector.

｠

Between  C-37  terminal  No.  43  and  B-111  terminal  No.  7:
Continuity exists.

When the continuity check result is OK, check that the wiring
harness is not shorted to the body and other wiring harness.

Q:Is the check result normal?

YES:

 Go to Step 4.

NO:

 Repair or replace the failure section.

AUTOMATIC TRANSAXLE MECHANICAL

23A-103

AUTOMATIC TRANSAXLE DIAGNOSIS

STEP 4. Check the TCM, A/T control solenoid valve
assembly connector pin terminals, and the connection
status.

Q:Is the check result normal?

YES:

 Go to Step 5.

NO:

 Repair or replace the failure section.

STEP 5. Check between the A/T control solenoid valve
assembly connector and low-reverse brake pressure
switch.
Check  for  continuity  between  the  B-111  A/T  control  solenoid
valve assembly connector terminals and the low-reverse brake
pressure switch connector terminals.

｠

Between  B-111  terminal  No.  7  and  low-reverse  brake
pressure switch: Continuity exists.

When the continuity check result is OK, check that the wiring
harness is not shorted to the body and other wiring harness.

Q:Is the check result normal?

YES:

 Go to Step 6.

NO:

 Repair or replace the failure section.

STEP 6. Check the low-reverse brake pressure switch body
ground.
Check  for  continuity  between  the  low-reverse  brake  pressure
switch body and ground.

｠

Between  the  low-reverse  brake  pressure  switch  body  and
body ground: Continuity exists.

Q:Is the check result normal?

YES:

 Replace the valve body assembly, and then go to Step

8.

NO:

 Repair or replace the failure section.

STEP 7. Check the TCM, A/T control solenoid valve
assembly connector pin terminals, and the connection
status.

Q:Is the check result normal?

YES:

 Go to Step 9.

NO:

 Repair or replace the failure section.

STEP 8. Erase the DTC code, and drive the vehicle for a
while.
Check that the normal code is displayed.

Q:Is the check result normal?

YES:

 The procedure is complete.

NO:

 Replace the TCM.

STEP 9. Erase the DTC code, and drive the vehicle for a
while.
Check that the normal code is displayed.

Q:Is the check result normal?

YES:

 The procedure is complete.

NO:

 Return to START.

23A-104

AUTOMATIC TRANSAXLE MECHANICAL

AUTOMATIC TRANSAXLE DIAGNOSIS

DTC P1705: Throttle Position Sensor Information (Engine)

M12301000424USA0000010000

DESCRIPTIONS OF MONITOR METHODS

｠

With the vehicle speed more than 5 km/h (3 mph),
and  with  the  output  shaft  speed  sensor  detected
normal or abnormal, the TPS fail signal is received
from ECM for 5.5 seconds.

MONITOR EXECUTION

｠

Continuous

MONITOR EXECUTION CONDITIONS (OTHER
MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored in
memory for the item monitored below)

｠

Not applicable

Sensor (The sensor below is determined to be
normal)

｠

Not applicable

AUTOMATIC TRANSAXLE MECHANICAL

23A-105

AUTOMATIC TRANSAXLE DIAGNOSIS

LOGIC FLOW CHARTS (Monitor Sequence)

ZC604082

V

PG-B

 : Calculated vehicle speed

          by output shaft speed sensor

Good

Malfunction

END

START

Yes

No

Output shaft speed sensor

in normal

Accelerator pedal position

frozen

V

PG-B 

≧ 

5 km/h

TPS fail signal

reception

Continuous failure  
      for 5.5 secs.

Continuous failure  
      for 3 secs.

Yes

Yes

Yes

No

No

No

No

Yes

Yes

No

0000

DTC SET CONDITIONS

Check Conditions <Throttle position sensor>

｠

Vehicle speed: 5 km/h(3 mph) or more.

Judgement Criteria <Throttle position sensor>

｠

Communication status: fail. (5.5 seconds)

Check Conditions <Accelerator pedal position
sensor>

｠

Vehicle  speed:  5  km/h  or  more  throttle  position
sensor  communication  status:  fail.  (Less  than  5.5
seconds)

23A-106

AUTOMATIC TRANSAXLE MECHANICAL

AUTOMATIC TRANSAXLE DIAGNOSIS