Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find an
engine control system fault.
1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Find the malfunction by following the Symptom

Chart.

4. Verify that the malfunction is eliminated.

SYMPTOM CHART

M1171002200270

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Throttle Valve will not Fully Open or Close

DIAGNOSIS

STEP 1. Check the accelerator cable adjustment.

Q: Is the accelerator cable properly adjusted?

YES :

Go to Step 2.

NO :

Adjust the accelerator cable by referring to

P.17-4

, and then go to Step 4.

STEP 2. Check the return spring.

Q: Is the return spring damaged or deformed?

YES :

Go to Step 3.

NO :

Replace, then go to Step 4.

STEP 3. Check the throttle lever.

Q: Is the throttle lever damaged or deformed?

YES :

Replace, then go to Step 4.

NO :

There is no action to be taken.

STEP 4. Check symptom.

Q: Does the throttle valve fully open and close?

YES :

This diagnosis is complete.

NO :

Return to Step 1.

SYMPTOM

INSPECTION PROCEDURE

REFERENCE PAGE

Throttle valve will not fully open or close

P.17-3

Accelerator pedal operation is not smooth
(over acceleration)

P.17-4

ENGINE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-4

INSPECTION PROCEDURE 2: Accelerator Pedal Operation is not Smooth (Over Acceleration)

DIAGNOSIS

STEP 1. Check the accelerator pedal.

Q: Is the accelerator pedal loose?

YES :

Tighten, then go to Step 4.

NO :

Go to Step 2.

STEP 2. Check the accelerator cable wiring.

Q: Is the accelerator cable routing bent sharply?

YES :

Repair, then go to Step 4.

NO :

Go to Step 3.

STEP 3. Check the accelerator cable lubricant.

Q: Is the accelerator cable lubricated sufficiently?

YES :

There is no action to be taken.

NO :

Refill or replace the lubricant, then go to
Step 4.

STEP 4. Check symptom.

Q: Does the accelerator pedal work normally?

YES :

This diagnosis is complete.

NO :

Return to Step 1.

ON-VEHICLE SERVICE

ACCELERATOR CABLE CHECK AND
ADJUSTMENT

M1171000900295

1. Turn A/C and lamps OFF. Inspect and adjust at no load.
2. Warm engine until stabilized at idle.
3. Confirm idle speed is at standard value.

Standard value: 700

± 100 r/min

4. Stop engine. [ignition switch: "LOCK" (OFF) position.]
5. Confirm there are no sharp bends in the accelerator cable.
6. Check the inner cable for correct slack.

Standard value: 1.0

− 2.0 mm (0.04 − 0.08 inch)

7. If there is too much slack or no slack, adjust play by the

following procedures.

(1) Loosen the adjusting bolt to release the cable.
(2) Move the plate until the inner cable play is at the standard

value, and then tighten the adjusting bolt.

(3) After adjusting, check that the throttle lever is touching

the stopper.

AC001444

ADJUSTING BOLTS

PLATE

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