Isuzu 2000 Trooper Workshop Manual page 1650

7A1–66 TRANSMISSION CONTROL SYSTEM (4L30–E)
DTC P0753 Shift Solenoid A Electrical (Cont'd)
Step
8 Using the J39200 DVOM, check a continuity between J2 (RED)
PCM terminal 43 and ground.
Is there a continuity?
9 1. Disconnect the transmission main case 7 pin connector M–7.
2. Using the J39200 DVOM, measure the resistance between
terminals M7–2(D) and M7–3(C).
Is the resistance within 18–20 ohms?
10 Check every connection at the PCM connector.
Was a problem found?
11 The wiring harness between PCM connector terminals J1–5 and
transmission harness terminal M7–3(C) is shorted to voltage.
Was a problem found and corrected?
12 The wiring harness between PCM connector terminal
J1–5 and transmission harness terminal M7–3(C) is shorted to
ground.
Was a problem found and corrected?
13 The wiring harness between PCM connector terminals J2–43 and
transmission harness terminal M7–2(D) is shorted to ground.
Was a problem found and corrected?
14 The wiring harness between PCM connector J1 or J2 and
transmission 16–way connector H–56 is open or poor connection.
Was a problem found and corrected?
15 The wiring harness between transmission 16–way connector
H–56 and transmission main case connector M–7 is open or has a
poor connection.
Was a problem found and corrected?
16 The shift solenoid A is faulty.
Replace the shift solenoid A. Refer to Solenoid (Main Case Valve
Body) in Automatic Transmission (4L30–E) section.
Is the replacement complete?
17 The PCM may be faulty.
Replace the PCM. Refer to Powertrain Control Module (PCM) in
Automatic Transmission (4L30–E) section.
Is the replacement complete?
18 Repair the PCM connector connection.
Was a problem found and corrected?
19 1. After the repair is complete, use the scan tool to select "DTC",
then "Clear Info" function and operate the vehicle under the
following conditions:
D The shift solenoid A is commanded "on" and voltage drops to
zero.
D The shift solenoid A is commanded "off" and voltage
increases to B+.
2. Review the scan tool "DTC Info".
Has the last test failed or is the current DTC displayed?
Action Yes
Go to Step 13 Go to Step 10
Go to Step 15 Go to Step 16
Go to Step 18 Go to Step 17
Go to Step 19
Go to Step 19
Go to Step 19
Go to Step 19
Go to Step 19
Go to Step 19
Go to Step 19
Go to Step 19
Begin diagnosis
again
Repair verified
Go to Step 1
Exit DTC table
No
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