2004 ISUZU TF SERIES service

6E-220 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
15
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

6E-224 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
6
1. Using the Tech 2, ignition "On" and engine "Off".
2. Monitor the "Throttle Position" in the data display.
Does the Tech 2 indicate correct "Throttle Position"
from 0% to 100% depending on accelerator pedal
operation?
- Go to Step 8 Go to Step 7
7
1. Using the Tech 2, ignition "On" and engine "Off".
2. Monitor the "Throttle Position" in the data display.
3. Adjust the TPS within 0% to 100%.
Is the action complete?
- Verify repair -
8
Check for the following conditions.

Objects blocking the throttle valve.

Vacuum leaking at throttle body.
If a problem is found, repair as necessary.
Was the problem found?
- Verify repair Refer to DTC
P0121 and Go to
Step 9
9
1. Using the Tech 2, ignition "On" and engine "On".
2. Select the "Miscellaneous Test" and perform the
"IAC Control" in the "IAC System".
3. Operate the Tech 2 in accrodance with procedure.
Was the engine speed changed, when the IAC Valve
is operating step by step?
-
Go to Step 10
Go to Step 10
10
Check for the following conditions.

Objects blocking the IAC Valve.

Objects blocking the throttle valve.

Vacuum leaking at throttle body.
If a problem is found, repair as necessary.
Was the problem found?
- Verify repair Refer to DTC
P1508/P1509
and Go to Step
11
11
Check for injector for the affected bank.
Refer to 6E-106 "Injector Coil Test & Injector Balance
Test Procedure".
Was the injector operation correct?
- Go to Step 12 Refer to Injector
Coil Test &
Injector Balance
Test Procedure
12
Check for fuel pressure.
Refer to 6E-116 "Fuel System Diagnosis".
Was the fuel pressure correct?
- Go to Step 13 Refer to Fuel
System
Diagnosis
13
Replace the O2 sensor for the affected bank.
Was the problem solved?
- Verify repair Go to Step 14
14
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 15

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-225
Step Action Value (s) Yes No
15
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-233
Step Action Value (s) Yes No
10 Using the DVM and check the injector signal circuit.
1. Ignition "On", engine "Off".
2. Disconnect the injector connector for the affected
cylinder.
3. Check the circuit for short to battery voltage circuit.
Was the DVM indicated battery voltage?
E-6/E-7/E-8/E-9/
E-51/E-52
V



- Repair faulty
harness and
verify repair Go to Step 12
11
Replace the injector for the affected cylinder.
Was the problem solved?
- Verify repair Go to Step 12
12
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 13
13
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

6E-242 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
19
Using the DVM and check the TPS or CMP sensor
power supply circuit.
1. Ignition "On", engine "Off".
2. Disconnect the TPS or CMP sensor connector.
3. Check the circuit for open or short to ground circuit.
Was the DVM indicated specified value?
E-62
E-68
VV




Approximately
5.0V
Go to Step 23
Go to Step 20
20
Repair the short to ground circuit between the ECM
and TPS or CMP sensor.
Was the problem solved?
- Verify repair Go to Step 23
21
Substitute a known good CKP sensor and recheck.
Was the problem solved?
- Go to Step 21 Go to Step 23
22
Replace the CKP sensor.
Was the problem solved?
- Verify repair Go to Step 23
23
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 24
24
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

6E-248 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
13
Using the DVM and check the CMP sensor ground
circuit.
1. Ignition "On", engine "Off".
2. Disconnect the CMP sensor connector .
3. Check the circuit for short to power supply circuit.
Was the DVM indicated specified value?
E-62
V




Less than 1V
Go to Step 14
Repair faulty
harness and
verify repair
14
Check the shield wire for open or short circuit.
Was the problem found?
- Verify repair Go to Step 15
15
Substitute a known good CMP sensor and recheck.
Was the problem solved?
- Go to Step 16 Go to Step 17
16
Replace the CMP sensor.
Was the problem solved?
- Verify repair Go to Step 17
17
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 18
18
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-257
Step Action Value (s) Yes No
11
Using the DVM and check the ignition coil ground
circuit.
1. Ignition "Off", engine "Off".
2. Disconnect the ignition coil connector for the
affected cylinder and ECM connector.
3. Check the circuit for open circuit.
Was the problem found?
E-53/E-54/E-55/
E-56/E-57/E-58




- Repair faulty
harness and
verify repair Go to Step 12
12
Replace the ignition coil for the affected cylinder.
Was the problem solved?
- Verify repair Go to Step 13
13
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 14
14
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

6E-262 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
10
Using the DVM and check the EGR valve solenoid
signal circuit.
1. Ignition "Off", engine "Off".
2. Disconnect the EGR valve connector.
3. Check the circuit for short to battery voltage circuit.
Was the DVM indicated battery voltage?
E-76
V




-
Repair faulty
harness and
verify repair
Go to Step 11
11
Substitute a known good EGR valve and recheck.
Was the problem solved?
- Go to Step 12 Go to Step 13
12
Replace the EGR valve.
Was the problem solved?
- Verify repair Go to Step 13
13
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 14
14
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -