Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 157
6E–232
4JH1 ENGINE DRIVEABILITY AND EMISSIONS
9
Using the DVM and check the TPS signal circuit.
1. Ignition “On”, engine “Off”.
2. Disconnect the TPS connector.
3. Check the circuit for short to power supply circuit.
Was the DVM indicated specified value?
Less than 1V
Go to Step 10
Repair faulty
harness and
verify repair
10
Using the DVM and check the TPS ground circuit.
1. Ignition “On”, engine “Off”.
2. Disconnect the TPS connector .
3. Check the circuit for short to power supply circuit.
Was the DVM indicated specified value?
Less than 1V
Go to Step 11
Repair faulty
harness and
verify repair
Step
Action
Value(s)
Yes
No
V
2
E-22
V
1
E-22
4JH1 ENGINE DRIVEABILITY AND EMISSIONS
6E–233
11
Using the DVM and check the TPS ground circuit.
Breaker box is available:
1. Ignition “Off”, engine “Off”.
2. Install the breaker box as type A. (ECM
disconnected) Ref. Page 6E-73
3. Disconnect the TPS connector.
4. Check the circuit for open circuit.
Was the problem found?
Breaker box is not available:
1. Ignition “Off”, engine “Off”.
2. Disconnect the TPS connector and ECM
connector.
3. Check the circuit for open circuit.
Was the problem found?
—
Repair faulty
harness and
verify repair
Go to Step 14
12
Substitute a known good TPS and recheck.
Was the problem solved?
—
Go to Step 13
Go to Step 14
13
Replace the TPS.
Is the action complete?
—
Verify repair
—
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 14
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 immobiliser system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobiliser System-ECM replacement” for
the ECM/Immobiliser linking procedure.
—
Verify repair
—
Step
Action
Value(s)
Yes
No
49
1
E-22
49
1
C-56
E-22
6E–234
4JH1 ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1120 (Symptom Code 7) (Flash Code 21)
Pedal/Throttle Position Sensor Voltage Supply Circuit High Input
Step
Action
Value(s)
Yes
No
1
Was the “On-Board Diagnostic (OBD) System Check”
performed?
—
Go to Step 2
Go to On Board
Diagnostic
(OBD) System
Check
2
1. Connect the Tech 2.
2. Review and record the failure information.
3. Select “F0: Read DTC Infor As Stored By ECU” in
“F0: Diagnostic Trouble Codes”.
Is the DTC P1120 (Symptom Code 7) stored as
“Present Failure”?
—
Go to Step 3
Refer to
Diagnostic Aids
and Go to Step
3
3
1. Using the Tech 2, ignition “On” and engine “Off”.
2. Select “F1: Clear DTC Information” in “F0:
Diagnostic Trouble Codes” with the Tech 2 and
clear the DTC information.
3. Operate the vehicle and monitor the “F0: Read
DTC Infor As Stored By ECU” in the “F0:
Diagnostic Trouble Codes”.
Was the DTC P1120 (Symptom Code 7) stored in this
ignition cycle?
—
Go to Step 4
Refer to
Diagnostic Aids
and Go to Step
4
4
Check for poor/faulty connection at the TPS or ECM
connector. If a poor/faulty connection is found, repair
as necessary.
Was the problem found?
—
Verify repair
Go to Step 5
5
Visually check the TPS.
Was the problem found?
—
Go to Step 8
Go to Step 6
49
39
57
2 3
1
C-56
E-22
4JH1 ENGINE DRIVEABILITY AND EMISSIONS
6E–235
6
Using the DVM and check the TPS power supply
circuit.
1. Ignition “On”, engine “Off”.
2. Disconnect the TPS connector.
3. Check the circuit for short to ground circuit.
Was the DVM indicated specified value?
Approximately
5.0V
Go to Step 12
Go to Step 7
7
Repair the short to battery voltage circuit between the
ECM and TPS.
Was the problem solved?
—
Verify repair
Go to Step 8
8
Substitute a known good TPS and recheck.
Was the problem solved?
—
Go to Step 9
Go to Step 10
9
Replace the TPS.
Is the action complete?
—
Verify repair
—
10
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 11
11
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 immobiliser system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobiliser System-ECM replacement” for
the ECM/Immobiliser linking procedure.
—
Verify repair
—
Step
Action
Value(s)
Yes
No
V
3
E-22
57
3
C-56
E-22
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