TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-601
.
CIRCUIT OPERATION
• A 5-volt power supply is applied on the APS
(main) power terminal (terminal No. 2) from the
PCM (terminal No. 92).
The ground terminal (terminal No. 1) is grounded
with PCM (terminal No. 91).
• When the accelerator pedal is moved from the
idle position to the fully opened position, the
resister between the APS (main) output terminal
(terminal No. 3) and ground terminal will increase
according to the rotation.
.
TECHNICAL DESCRIPTION
• The APS (main) outputs voltage which corre-
sponds to the accelerator pedal depression.
• The PCM checks whether the voltage is within a
specified range.
.
DTC SET CONDITIONS
Check Conditions
• Ignition switch "ON" position.
Judgement Criteria
• APS (main) output voltage is 0.2 volts or less for
1 second.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• APS failed or maladjusted.
• Open or shorted APS (main) circuit, or loose con-
nector.
• PCM failed.
DIAGNOSIS
Required Special Tool:
• MB991502: Scan Tool (MUT-II)
STEP 1. Using scan tool MB991502, check data list item 78:
Accelerator Pedal Position Sensor (main).
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item
78, Accelerator Pedal Position Sensor (main).
• Output voltage is between 0.905 and 1.165 volts when
foot is released from accelerator pedal.
• Output voltage is 4.035 volts or higher when accelerator
pedal is fully depressed.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use Troubleshooting/
Inspection. Service Points
P.00-6
.
NO : Go to Step 2.
AK200944
ACCELERATOR
PEDAL
POSITION
SENSOR
AB
D-138(GR)
CONNECTOR: D-138
AK201038AF
CONNECTOR: D-135
PCM
D-135(GR)
ACX01539
16-PIN
MB991502
AC