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Isuzu Rodeo UE. Manual - part 339

6E2–111

RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Evaporative (EVAP) Emissions Canister Purge Valve Check

(Cont'd)

Step

Yes

Value(s)

Action

1. Turn the ignition “OFF.”
2. At the throttle body, install a vacuum gauge where

the hose from the purge solenoid was disconnected
for testing.

3. Start the engine.
4. Stabilize the engine speed at about 2500 RPM.
5. Momentarily snap the throttle open and let it return

to idle.

Is there approximately 10” Hg (34 kPa) of vacuum
available at the EVAP emission canister purge
solenoid?

—

No problem
found in the

EVAP

emission

canister

purge valve

check

Refer to

Diagnostic

Aids

1. Disconnect the solenoid electrical connector.
2. Connect a test lamp between the harness

terminals.

Does the test lamp light?

—

Go to

Step 7

Go to

Step 10

Probe terminal A and terminal B with a test lamp to
ground.

Does the test lamp light on both terminals?

—

Go to

Step 11

Go to

Step 12

Repair the short to voltage in the RED/BLUE wire.

Is the action complete?

—

Verify repair

—

Does on of the terminals light the test lamp?

—

Go to

Step 13

Go to

Step 14

Check for an open in the RED/BLU wire between the
purge solenoid and the PCM.

Was there an open circuit?

—

Go to

Step 15

Go to

Step 6

Repair the open in the BLK/YEL wire.

Is the action complete?

—

Verify repair

—

Repair the open in the RED/BLU wire.

Is the action complete?

—

Verify repair

—

6E2–112

RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Up-Shift Lamp System Check

D06RX007

6E2–113

RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Circuit Description

The shift lamp indicates the best transmission shift point
for maximum fuel economy.
The lamp is controlled by the Power Train Control Module
(PCM) and is turned “ON” by grounding the BLK wire.
The PCM is used information from the following inputs to
control the upshift lamp.

Engine Coolant temperature (ECT) Sensor

Throttle Position Sensor

Vehicle Speed Sensor

Engine Speed

The PCM uses the measured RPM and the vehicle speed
to calculate what gear the vehicle is in.
It’s this calculation that determines when the upshift lamp
should be turned “ON”.

Diagnostic Aids

An intermittent may be caused by a poor connection,
rubbed-through wire insulation. Check for poor
connections or a damaged harness.

Inspect the PCM harness and connector for proper
mating, broken locks, improperly formed or damaged
terminals, poor terminal-to-wire connection and
damaged harness.

Test Description

1. This should not turn “ON” the up-shift lamp. If the

lamp is “ON”, there is a short to ground in BLK or a
fault PCM.

2. This checks the upshift lamp circuit up to the PCM

connector.
If the up-shift lamp illuminates, then the PCM
connector is faulty or PCM does not have the ability
to ground the circuit.

Up-Shift Lamp System Check

Step

Action

Value(s)

Yes

1. Verify the customer complaints in accordance with

mentioned below: Go to the adequate Step Chart
first.

At the 1

gear position, the lamp doesn’t

illuminate: Go to Step Chart

At the 3

gear position, the lamp doesn’t

illuminate: Go to Step Chart

Upshift Lamp doesn’t illuminate always.

2. Ignition “ON”, engine “OFF”.
3. Using the Tech 2, check to see if the upshift lamp

turn “ON” or “OFF”.

Does the upshift lamp stay “OFF”?

—

Go to

Step 2

Go to

Step 12

Check for an open of 15A Turn Backup Fuse.

Was a problem found?

—

Go to

Step 3

Go to

Step 4

Refer to Sec-

tion 8

Replace the fuse.

Is the action complete?

Verify Repair

—

Check for an burned out the Upshift Lamp.

Was a problem found?

—

Go to

Step 5

Go to

Step 6

Replace the Upshift Lamp.

Is the action complete?

Verify Repair

—

1. Check for an Clutch Switch operation and the fixing

condition.

2. Check for an open or short of clutch switch.
3. Check for an open or short of WHT/GRN wiring

harness between Turn Backup Fuse and Clutch
Switch.

Was a problem found?

—

Go to

Step 7

Go to

Step 8

6E2–114

RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS

Up-Shift Lamp System Check

(Cont'd)

Step

Yes

Value(s)

Action

1. Replace the Clutch Switch. Or,
2. Repair for an open or short of WHT/GRN wiring

harness.

Is the action complete?

Verify Repair

—

1. Check for an open or short of 1-2 Transmission

Switch.

2. Check for an open or short of 3-4 Transmission

Switch.

3. Check for an open or short of GRN wiring harness

between Clutch Switch and Transmission
Switches.

Was a problem found?

—

Go to

Step 9

Go to

Step 10

1. Replace the applicable Transmission Switch. or,
2. Repair for an open or short of GRN wiring harness.

Is the action complete?

Verify Repair

—

1. Check for an open or short in the Alarmer and Relay

Control Unit.

2. Check for an open of BLU/ORN wiring harness

between Transmission Switches and Alarmer Relay
Control Unit.

Was a problem found?

—

Go to

Step 11

Go to

Step 12

1. Replace the Alarmer and Relay Control Unit. Or,
2. Repair for an open of BLU/ORN wiring harness

between Alarmer and Relay Control Unit and PCM
connector.

Is the action complete?

Verify Repair

—

Go to

Step 15

1. Ignition “OFF”.
2. Disconnect the PCM connectors.
3. Shift the gear to 1

or 4

gear position.

4. Turn ignition “ON”, but

don’t start the engine.

Does the Upshift Lamp Stay “ON”?

—

Go to

Step 13

Go to

Step 15

Check for an short to ground of YEL/GRN wiring
harness between Alarmer and PCM connector.

Was a problem found?

—

Go to

Step 14

Go to

Step 15

Repair for an open YEL/GRN wiring harness.

Is the action complete?

Verify Repair

—

Replace the PCM.

IMPORTANT: The replacement PCM must be
programmed refer to

ON-Vehicle Service in Power

Train Control Module and Sensor for procedure.

And also refer to latest Service Bulletin.

Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.

Is the action complete?

—

Content .. 337 338 339 340 ..