Isuzu 1999 RODEO Workshop Manual page 1964

DTC P1860 TCC Solenoid Electrical (Cont'd)
Step
11 1. Disconnect the transmission 16–way connector H–10.
2. Using the J39200 DVOM, measure the resistance between
terminal H10–4 and ground.
Is the resistance within 18–20 ohms?
12 1. Disconnect the transmission adapter case connector M–6.
2. Using the J39200 DVOM, measure the resistance between
terminal M6–4(A) and ground.
Is the resistance within 18–20 ohms?
13 The wiring harness between PCM connector terminal C2–D2 and
transmission 16–way connector terminal H10–4 is shorted to
ground.
Was a problem found and corrected?
14 The wiring harness between transmission 16–way connector
H–10 and adapter case connector M–6 is shorted to ground.
Was a problem found and corrected?
15 The TCC solenoid is faulty, or the internal wiring harness from the
TCC solenoid is shorted to ground.
Was a problem found and corrected?
16 The wiring harness between PCM connector terminal C2–D2 and
transmission 16–way connector terminal H10–4 is open.
Was a problem found and corrected?
17 The wiring harness between transmission 16–way connector
terminal H10–4 and adapter case terminal M6–4(A) is open.
Was a problem found and corrected?
18 The TCC solenoid is faulty, or the internal wiring harness from the
TCC solenoid is open.
Was a problem found and corrected?
19 Check every connection at the PCM.
If OK, replace the PCM. Refer to Powertrain Control Module
(PCM) in Automatic Transmission (4L30–E) section.
Is the replacement complete?
20 Check the PCM connector terminal C2–D2, transmission 16–way
connector terminal H10–4 and transmission adapter case
connector terminal M6–4(A).
Was a problem found and corrected?
21 1. After the repair is complete, use the scan tool to select "DTC",
then "Clear Info" function and ensure the following conditions
are met:
f The TCC solenoid is commanded "on" and the volts increase
to B+.
f The TCC solenoid is commanded "off" and the volts drop to
zero.
2. Review the scan tool "DTC Info".
Has the last test failed or is the current DTC displayed?
TRANSMISSION CONTROL SYSTEM (4L30–E)
Action Yes
Go to Step 13 Go to Step 12
Go to Step 14 Go to Step 15
Go to Step 21
Go to Step 21
Go to Step 21
Go to Step 21
Go to Step 21
Go to Step 21
Go to Step 21
Go to Step 21
Begin diagnosis
again Repair verified
Go to Step 1 Exit DTC table
7A1–85
No
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