Opel Frontera UE. Manual - part 1610

 

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Opel Frontera UE. Manual - part 1610

 

 

7A1–62 TRANSMISSION CONTROL SYSTEM (4L30–E)

DTC P1850/Flashing Code 88 Brake Band Apply Solenoid Malfunction

D07RY00035

Circuit Description

D

The brake band apply solenoid is a normally open
solenoid which controls the flow of fluid for brake band
application.  The Powertrain Control Module (PCM)
uses Pulse Width Modulation (PWM) and changes
the duty cycle to control the solenoid.  The PCM turns
the solenoid on (energized) and off (deenergized) at a
constant frequency.  The length of time the solenoid is
energized during each on/off cycle is called the pulse
width.  By varying or “modulating” the pulse width, the
solenoid output pressure is changed.  Since the
solenoid is normally open, increasing the pulse width
increases the duty cycle and decreases the output
pressure.  PWM control provides smooth band
application without an accumulator.  The band is only
applied in first and second gears.

D

In the event of an electrical failure (open), the
solenoid regulates at the maximum oil flow (0% duty
cycle).

D

The solenoid is activated by a current.  This current is
produced by applying a voltage to one side (the High
side) and a ground to the other side (Low side).

D

The High Side Driver (HSD) is a circuit of the PCM
that acts as a switch between the solenoids and the
supply voltage.  The High side of the solenoid is
permanently supplied with voltage. When the ignition
is off, the HSD is turned off.

This DTC detects a continuous open or short to ground in
the brake band apply solenoid circuit or the brake band
apply solenoid.  This is a type “D” DTC.

Conditions For Setting The DTC

D

Battery voltage is between 10 and 16 volts.

D

Ignition is “on”, Engine “run”.

D

The PCM commands the solenoid “on” and the
voltage remains high (B+), or the PCM commands
the solenoid “off” and the voltage remains low (zero
volts).

D

All conditions met in 1.34

1.56 seconds.

Action Taken When The DTC Sets

D

Inhibit brake band apply solenoid.

D

The PCM will not illuminate the CHECK TRANS
Lamp.

Conditions For Clearing The DTC

D

The DTC can be cleared from the PCM history by
using a scan tool.

D

The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.

D

The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled “off”
long enough to power down the PCM.

SECTION

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–63

Diagnostic Aids

D

Inspect the wiring for poor electrical connection at the
PCM and at the transmission 7–way connector.  Look
for possible bent, backed out, deformed or damaged
terminals.  Check for weak terminal tension as well.
Also check for a chafed wire that could short to bare
metal or other wiring.  Inspect for a broken wire inside
the insulation.

D

When diagnosing for a possible intermittent short or
open condition, move the wiring harness while
observing test equipment for a change.

Test Description

The numbers below refer to the step numbers on the
diagnostic chart:
2. This test checks for power to the brake band apply

solenoid from the ignition through the PCM.

3. This test checks the resistance of the transmission

internal wiring harness and brake band apply
solenoid.

4. This test checks the ability of the PCM and wiring to

control the ground circuit.

DTC P1850/Flashing Code 88 Brake Band Apply Solenoid Malfunction 

Step

Action

Yes

No

1

1. Install the scan tool.
2. With the engine “on”, turn the ignition switch “on”.

NOTE: Before clearing DTC(s), use the scan tool to record “Failure
Records” for reference, as data will be lost when the “Clear Info”
function is used.

3. Record the DTC “Failure Records”.

Were DTCs P0753, P0758 set?

Go to 

Step 1

Go to 

Step 3

2

Using the J39200 DVOM, back probe between PCM connector
terminals E22–43 and E22–1.

Is the voltage between 10 to 12 volts?

Go to 

Step 4

Go to 

Step 5

3

1. Turn the ignition “off”.
2. Disconnect the E–21 (J1, BLUE) and E–22 (J2, RED) PCM

connector.

3. Using the J39200 DVOM, measure the resistance between

PCM connector terminals E22–43 and E22–10.

Is the resistance within 10–12 ohms?

Go to 

Step 9

Go to 

Step 10

4

Using the J39200 DVOM, back probe between PCM connector
terminals E22–10 and E22–1.

Is the voltage between 10 to 12 volts?

Go to 

Step 18

Go to 

Step 3

5

1. Turn the ignition “off”.
2. Disconnect the E–21 (J1, BLUE) and E–22 (J2, RED) PCM

connector.

3. Using the J39200 DVOM, check continuity between PCM

terminal E22–43 and ground.

Is there a continuity?

Go to 

Step 6

Go to 

Step 7

6

1. Disconnect the transmission main case connector E–54.
2. Using the J39200 DVOM, check continuity between the

terminal E54–7(B) and ground.

Is there continuity?

Go to 

Step 12

Go to 

Step 13

7

1. Disconnect the E–21 (J1, BLUE) and E–22 (J2, RED) PCM

Connector.

2. Using the J39200 DVOM, measure the resistance between

the PCM connector terminals E22–43 and E22–10.

Is the resistance within 10–12 ohms?

Go to 

Step 18

Go to 

Step 8

8

1. Disconnect the transmission main case connector E–54.
2. Using the J39200 DVOM, measure the resistance between

the terminals E54–7(B) and E54–2(D).

Is the resistance within 10–12 ohms?

Go to 

Step 14

Go to 

Step 15

SECTION

7A1–64 TRANSMISSION CONTROL SYSTEM (4L30–E)

DTC P1850/Flashing Code 88 Brake Band Apply Solenoid Malfunction  (Cont’d)

Step

No

Yes

Action

9

Using the J39200 DVOM, check continuity between PCM
terminal E22–10 and ground.

Is there continuity?

Go to 

Step 11

Go to 

Step 18

10

1. Disconnect the transmission main case connector E–54.
2. Using the J39200 DVOM, measure the resistance between

the terminals E54–7(B) and E54–2(D).

Is the resistance within 10–12 ohms?

Go to 

Step 17

Go to 

Step 15

11

1. Disconnect the transmission main case connector E–54.
2. Using the J39200 DVOM, check continuity between the

terminals E54–7(B) and ground.

Is there a continuity?

Go to 

Step 12

Go to 

Step 16

12

The brake band apply solenoid is faulty, or the internal wiring
harness from the brake band apply solenoid is shorted to ground.

Was a problem found and corrected?

Go to 

Step 19

13

The wiring harness between the PCM connector terminal E22–43
and the transmission main case connector terminal E54–2(D) is
shorted to ground.

Was a problem found and corrected?

Go to 

Step 19

14

The wiring harness between the PCM connector terminal E22–43
and the transmission main case connector terminal E54–2(D) is
open.

Was a problem found and corrected?

Go to 

Step 19

15

The brake band apply solenoid is faulty, or the internal wiring
harness from the brake band apply solenoid is open.

Was a problem found and corrected?

Go to 

Step 19

16

The wiring harness between the PCM connector terminal E22–10
and the transmission main case connector terminal E54–7(B) is
shorted ground.

Was a problem found and corrected?

Go to 

Step 19

17

The wiring harness between the PCM connector terminal E22–10
and the transmission main case connector terminal E54–7(B) is
open.

Was a problem found and corrected?

Go to 

Step 19

18

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?

Go to 

Step 19

19

1. After the repair is complete, use the scan tool to select “DTC”,

then “Clear Info” function and ensure the following conditions
are met:

D

The brake band apply solenoid is commanded “on” and the
volts drop to zero.

D

The brake band apply solenoid is commanded “off” and the
volts increase to B+.

2. Review the scan tool “DTC Info”.

Has the last test failed or is the current DTC displayed?

Begin diagnosis

again

Go to 

Step 1

Repair verified
Exit DTC table

SECTION

TRANSMISSION CONTROL SYSTEM (4L30–E)

7A1–65

DTC P1860/Flashing Code 89 TCC Solenoid Electrical

D07RY00036

Circuit Description

The PCM allows current to flow through the solenoid (0 or
12 volts).  This current flow through the solenoid coil
creates a magnetic field that magnetizes the solid core.
The magnetized core attracts the check ball to seat
against spring pressure.  This blocks the exhaust for the
TCC signal fluid and allows solenoid feed drive fluid to
feed to TCC signal circuit.  The TCC signal fluid pressure
acts on the torque converter clutch control valve.  When
the TCC control valve is in the apply position, line
pressure is directed through the TCC valve to apply the
torque converter clutch. The TCC solenoid is attached to
the valve body within the transmission.
This DTC detects a continuous open or short to ground or
ignition in the TCC circuit or the TCC solenoid.  This is a
type “C” DTC.

Conditions For Setting The DTC

D

Battery voltage is between 10 and 16 volts.

D

No shift solenoid A DTCs P0753 (Flashing Code 83).

D

No shift solenoid B DTCs P0758 (Flashing Code 84).

D

Ignition “on”. Engine “run”.

D

The PCM commands the solenoid “on” and the
voltage remains low (zero volts).

D

The PCM commands the solenoid “off” and the
voltage remains high (B+).

D

All conditions met for 0.875 

 1.25 seconds.

Action Taken When The DTC Sets

D

Inhibit TCC engagement.

D

The PCM will illuminate the CHECK TRANS Lamp.

Conditions For Clearing The DTC

D

The PCM will turn off the CHECK TRANS Lamp after
three consecutive ignition cycles without a failure
reported.

D

The DTC can be cleared from the PCM history by
using a scan tool.

D

The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.

D

The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled “off”
long enough to power down the PCM.

Diagnostic Aids

D

Inspect the wiring for poor electrical connections at
the PCM and at the transmission 4–way connector.
Look for possible bent, backed out, deformed or
damaged terminals.  Check for weak terminal tension
as well.  Also check for a chafed wire that could short
to bare metal or other wiring.  Inspect for a broken wire
inside the insulation.

D

When diagnosing for a possible intermittent short or
open condition, move the wiring harness while
observing test equipment for a change.

Test Description

The numbers below refer to the step numbers on the
diagnostic chart:
2. This test checks for voltage to the solenoid.
3. This test checks the ability of the PCM and wiring to

control the ignition circuit.

7. This test checks the resistance of the TCC solenoid

and the internal wiring harness.

SECTION

 

 

 

 

 

 

 

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